Vulnerabilities > CVE-2018-6789 - Classic Buffer Overflow vulnerability in multiple products

047910
CVSS 9.8 - CRITICAL
Attack vector
NETWORK
Attack complexity
LOW
Privileges required
NONE
Confidentiality impact
HIGH
Integrity impact
HIGH
Availability impact
HIGH
network
low complexity
exim
debian
canonical
CWE-120
critical
nessus
exploit available

Summary

An issue was discovered in the base64d function in the SMTP listener in Exim before 4.90.1. By sending a handcrafted message, a buffer overflow may happen. This can be used to execute code remotely.

Vulnerable Configurations

Part Description Count
Application
Exim
122
OS
Debian
3
OS
Canonical
3

Common Attack Pattern Enumeration and Classification (CAPEC)

  • Buffer Overflow via Environment Variables
    This attack pattern involves causing a buffer overflow through manipulation of environment variables. Once the attacker finds that they can modify an environment variable, they may try to overflow associated buffers. This attack leverages implicit trust often placed in environment variables.
  • Overflow Buffers
    Buffer Overflow attacks target improper or missing bounds checking on buffer operations, typically triggered by input injected by an attacker. As a consequence, an attacker is able to write past the boundaries of allocated buffer regions in memory, causing a program crash or potentially redirection of execution as per the attackers' choice.
  • Client-side Injection-induced Buffer Overflow
    This type of attack exploits a buffer overflow vulnerability in targeted client software through injection of malicious content from a custom-built hostile service.
  • Filter Failure through Buffer Overflow
    In this attack, the idea is to cause an active filter to fail by causing an oversized transaction. An attacker may try to feed overly long input strings to the program in an attempt to overwhelm the filter (by causing a buffer overflow) and hoping that the filter does not fail securely (i.e. the user input is let into the system unfiltered).
  • MIME Conversion
    An attacker exploits a weakness in the MIME conversion routine to cause a buffer overflow and gain control over the mail server machine. The MIME system is designed to allow various different information formats to be interpreted and sent via e-mail. Attack points exist when data are converted to MIME compatible format and back.

Exploit-Db

  • descriptionExim < 4.90.1 - 'base64d' Remote Code Execution. CVE-2018-6789. Remote exploit for Linux platform. Tags: Remote
    fileexploits/linux/remote/44571.py
    idEDB-ID:44571
    last seen2018-05-24
    modified2018-05-02
    platformlinux
    port25
    published2018-05-02
    reporterExploit-DB
    sourcehttps://www.exploit-db.com/download/44571/
    titleExim < 4.90.1 - 'base64d' Remote Code Execution
    typeremote
  • fileexploits/linux/remote/45671.py
    idEDB-ID:45671
    last seen2018-11-30
    modified2018-10-24
    platformlinux
    port25
    published2018-10-24
    reporterExploit-DB
    sourcehttps://www.exploit-db.com/download/45671
    titleexim 4.90 - Remote Code Execution
    typeremote

Nessus

  • NASL familySMTP problems
    NASL idEXIM_4_90_1.NASL
    descriptionAccording to its banner, the version of Exim running on the remote host is prior to 4.90.1. It is, therefore, potentially affected by a buffer overflow vulnerability. A flaw exists base64d() function due to improper validation of parsed messages. A remote attacker could potentially cause a buffer overflow condition and execute arbitrary code.
    last seen2020-06-01
    modified2020-06-02
    plugin id107149
    published2018-03-06
    reporterThis script is Copyright (C) 2018-2019 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/107149
    titleExim < 4.90.1 Buffer Overflow RCE Vulnerability
    code
    #
    # (C) Tenable Network Security, Inc.
    #
    
    include("compat.inc");
    
    if (description)
    {
      script_id(107149);
      script_version("1.9");
      script_cvs_date("Date: 2019/11/08");
    
      script_cve_id("CVE-2018-6789");
      script_bugtraq_id(103049);
    
      script_name(english:"Exim < 4.90.1 Buffer Overflow RCE Vulnerability");
      script_summary(english:"Checks the version of the SMTP banner.");
    
      script_set_attribute(attribute:"synopsis", value:
    "The remote mail server is potentially affected by a buffer overflow
    vulnerability.");
      script_set_attribute(attribute:"description", value:
    "According to its banner, the version of Exim running on the remote
    host is prior to 4.90.1. It is, therefore, potentially affected by a
    buffer overflow vulnerability. A flaw exists base64d() function due to
    improper validation of parsed messages. A remote attacker could
    potentially cause a buffer overflow condition and execute arbitrary code.");
      script_set_attribute(attribute:"see_also", value:"https://seclists.org/oss-sec/2018/q1/133");
      script_set_attribute(attribute:"see_also", value:"http://exim.org/static/doc/security/CVE-2018-6789.txt");
      script_set_attribute(attribute:"see_also", value:"ftp://ftp.exim.org/pub/exim/exim4/ChangeLog");
      # https://devco.re/blog/2018/03/06/exim-off-by-one-RCE-exploiting-CVE-2018-6789-en/
      script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?4e4be781");
      script_set_attribute(attribute:"solution", value:
    "Upgrade to Exim 4.90.1 or later.");
      script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P");
      script_set_cvss_temporal_vector("CVSS2#E:F/RL:OF/RC:C");
      script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H");
      script_set_cvss3_temporal_vector("CVSS:3.0/E:F/RL:O/RC:C");
      script_set_attribute(attribute:"cvss_score_source", value:"CVE-2018-6789");
    
      script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
      script_set_attribute(attribute:"exploit_available", value:"true");
      script_set_attribute(attribute:"exploit_framework_canvas", value:"true");
      script_set_attribute(attribute:"canvas_package", value:'CANVAS');
    
      script_set_attribute(attribute:"vuln_publication_date", value:"2018/02/07");
      script_set_attribute(attribute:"patch_publication_date", value:"2018/02/10");
      script_set_attribute(attribute:"plugin_publication_date", value:"2018/03/06");
    
      script_set_attribute(attribute:"potential_vulnerability", value:"true");
      script_set_attribute(attribute:"plugin_type", value:"remote");
      script_set_attribute(attribute:"cpe", value:"cpe:/a:exim:exim");
      script_end_attributes();
    
      script_category(ACT_GATHER_INFO);
      script_family(english:"SMTP problems");
    
      script_copyright(english:"This script is Copyright (C) 2018-2019 and is owned by Tenable, Inc. or an Affiliate thereof.");
    
      script_dependencies("smtpserver_detect.nasl");
      script_require_keys("Settings/ParanoidReport");
      script_require_ports("Services/smtp", 25);
    
      exit(0);
    }
    
    
    include("audit.inc");
    include("global_settings.inc");
    include("misc_func.inc");
    include("smtp_func.inc");
    
    if (report_paranoia < 2) audit(AUDIT_PARANOID);
    
    port = get_service(svc:"smtp", default:25, exit_on_fail:TRUE);
    
    banner = get_smtp_banner(port:port);
    if (!banner) audit(AUDIT_NO_BANNER, port);
    if ("Exim" >!< banner) audit(AUDIT_NOT_LISTEN, 'Exim', port);
    
    matches = pregmatch(pattern:"220.*Exim ([0-9\._]+)", string:banner);
    if (isnull(matches)) audit(AUDIT_SERVICE_VER_FAIL, 'Exim', port);
    
    version = matches[1];
    # Underscore was added to the vesion
    version = ereg_replace(string:version, pattern:"_", replace:".");
    
    if (
         version =~ "^[0-3]\." ||
         version =~ "^4\.([0-8][0-9]|90([^0-9.]|$))"
       )
    {
      report =
        '\n  Banner            : ' + banner +
        '\n  Installed version : ' + version +
        '\n  Fixed version     : 4.90.1';
    
      security_report_v4(port:port, severity:SECURITY_HOLE, extra:report);
    }
    else audit(AUDIT_LISTEN_NOT_VULN, 'Exim', port, version);
    
  • NASL familyUbuntu Local Security Checks
    NASL idUBUNTU_USN-3565-1.NASL
    descriptionMeh Chang discovered that Exim incorrectly handled memory in certain decoding operations. A remote attacker could use this issue to cause Exim to crash, resulting in a denial of service, or possibly execute arbitrary code. Note that Tenable Network Security has extracted the preceding description block directly from the Ubuntu security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.
    last seen2020-06-01
    modified2020-06-02
    plugin id106791
    published2018-02-13
    reporterUbuntu Security Notice (C) 2018-2019 Canonical, Inc. / NASL script (C) 2018-2019 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/106791
    titleUbuntu 14.04 LTS / 16.04 LTS / 17.10 : exim4 vulnerability (USN-3565-1)
    code
    #
    # (C) Tenable Network Security, Inc.
    #
    # The descriptive text and package checks in this plugin were
    # extracted from Ubuntu Security Notice USN-3565-1. The text 
    # itself is copyright (C) Canonical, Inc. See 
    # <http://www.ubuntu.com/usn/>. Ubuntu(R) is a registered 
    # trademark of Canonical, Inc.
    #
    
    include("compat.inc");
    
    if (description)
    {
      script_id(106791);
      script_version("3.10");
      script_cvs_date("Date: 2019/09/18 12:31:48");
    
      script_cve_id("CVE-2018-6789");
      script_xref(name:"USN", value:"3565-1");
    
      script_name(english:"Ubuntu 14.04 LTS / 16.04 LTS / 17.10 : exim4 vulnerability (USN-3565-1)");
      script_summary(english:"Checks dpkg output for updated packages.");
    
      script_set_attribute(
        attribute:"synopsis", 
        value:
    "The remote Ubuntu host is missing one or more security-related
    patches."
      );
      script_set_attribute(
        attribute:"description", 
        value:
    "Meh Chang discovered that Exim incorrectly handled memory in certain
    decoding operations. A remote attacker could use this issue to cause
    Exim to crash, resulting in a denial of service, or possibly execute
    arbitrary code.
    
    Note that Tenable Network Security has extracted the preceding
    description block directly from the Ubuntu security advisory. Tenable
    has attempted to automatically clean and format it as much as possible
    without introducing additional issues."
      );
      script_set_attribute(
        attribute:"see_also",
        value:"https://usn.ubuntu.com/3565-1/"
      );
      script_set_attribute(
        attribute:"solution", 
        value:
    "Update the affected exim4-daemon-heavy and / or exim4-daemon-light
    packages."
      );
      script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P");
      script_set_cvss_temporal_vector("CVSS2#E:F/RL:OF/RC:C");
      script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H");
      script_set_cvss3_temporal_vector("CVSS:3.0/E:F/RL:O/RC:C");
      script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
      script_set_attribute(attribute:"exploit_available", value:"true");
      script_set_attribute(attribute:"exploit_framework_canvas", value:"true");
      script_set_attribute(attribute:"canvas_package", value:'CANVAS');
    
      script_set_attribute(attribute:"plugin_type", value:"local");
      script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:exim4-daemon-heavy");
      script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:exim4-daemon-light");
      script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:14.04");
      script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:16.04");
      script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:17.10");
    
      script_set_attribute(attribute:"vuln_publication_date", value:"2018/02/08");
      script_set_attribute(attribute:"patch_publication_date", value:"2018/02/12");
      script_set_attribute(attribute:"plugin_publication_date", value:"2018/02/13");
      script_set_attribute(attribute:"in_the_news", value:"true");
      script_set_attribute(attribute:"generated_plugin", value:"current");
      script_end_attributes();
    
      script_category(ACT_GATHER_INFO);
      script_copyright(english:"Ubuntu Security Notice (C) 2018-2019 Canonical, Inc. / NASL script (C) 2018-2019 and is owned by Tenable, Inc. or an Affiliate thereof.");
      script_family(english:"Ubuntu Local Security Checks");
    
      script_dependencies("ssh_get_info.nasl");
      script_require_keys("Host/cpu", "Host/Ubuntu", "Host/Ubuntu/release", "Host/Debian/dpkg-l");
    
      exit(0);
    }
    
    
    include("audit.inc");
    include("ubuntu.inc");
    include("misc_func.inc");
    
    if ( ! get_kb_item("Host/local_checks_enabled") ) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
    release = get_kb_item("Host/Ubuntu/release");
    if ( isnull(release) ) audit(AUDIT_OS_NOT, "Ubuntu");
    release = chomp(release);
    if (! preg(pattern:"^(14\.04|16\.04|17\.10)$", string:release)) audit(AUDIT_OS_NOT, "Ubuntu 14.04 / 16.04 / 17.10", "Ubuntu " + release);
    if ( ! get_kb_item("Host/Debian/dpkg-l") ) audit(AUDIT_PACKAGE_LIST_MISSING);
    
    cpu = get_kb_item("Host/cpu");
    if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
    if ("x86_64" >!< cpu && cpu !~ "^i[3-6]86$") audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, "Ubuntu", cpu);
    
    flag = 0;
    
    if (ubuntu_check(osver:"14.04", pkgname:"exim4-daemon-heavy", pkgver:"4.82-3ubuntu2.4")) flag++;
    if (ubuntu_check(osver:"14.04", pkgname:"exim4-daemon-light", pkgver:"4.82-3ubuntu2.4")) flag++;
    if (ubuntu_check(osver:"16.04", pkgname:"exim4-daemon-heavy", pkgver:"4.86.2-2ubuntu2.3")) flag++;
    if (ubuntu_check(osver:"16.04", pkgname:"exim4-daemon-light", pkgver:"4.86.2-2ubuntu2.3")) flag++;
    if (ubuntu_check(osver:"17.10", pkgname:"exim4-daemon-heavy", pkgver:"4.89-5ubuntu1.3")) flag++;
    if (ubuntu_check(osver:"17.10", pkgname:"exim4-daemon-light", pkgver:"4.89-5ubuntu1.3")) flag++;
    
    if (flag)
    {
      security_report_v4(
        port       : 0,
        severity   : SECURITY_HOLE,
        extra      : ubuntu_report_get()
      );
      exit(0);
    }
    else
    {
      tested = ubuntu_pkg_tests_get();
      if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
      else audit(AUDIT_PACKAGE_NOT_INSTALLED, "exim4-daemon-heavy / exim4-daemon-light");
    }
    
  • NASL familyFreeBSD Local Security Checks
    NASL idFREEBSD_PKG_316B3C3E0E9811E88D4197657151F8C2.NASL
    descriptionExim developers report : There is a buffer overflow in base64d(), if some pre-conditions are met. Using a handcrafted message, remote code execution seems to be possible.
    last seen2020-06-01
    modified2020-06-02
    plugin id106733
    published2018-02-12
    reporterThis script is Copyright (C) 2018 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/106733
    titleFreeBSD : exim -- a buffer overflow vulnerability, remote code execution (316b3c3e-0e98-11e8-8d41-97657151f8c2)
    code
    #
    # (C) Tenable Network Security, Inc.
    #
    # The descriptive text and package checks in this plugin were  
    # extracted from the FreeBSD VuXML database :
    #
    # Copyright 2003-2018 Jacques Vidrine and contributors
    #
    # Redistribution and use in source (VuXML) and 'compiled' forms (SGML,
    # HTML, PDF, PostScript, RTF and so forth) with or without modification,
    # are permitted provided that the following conditions are met:
    # 1. Redistributions of source code (VuXML) must retain the above
    #    copyright notice, this list of conditions and the following
    #    disclaimer as the first lines of this file unmodified.
    # 2. Redistributions in compiled form (transformed to other DTDs,
    #    published online in any format, converted to PDF, PostScript,
    #    RTF and other formats) must reproduce the above copyright
    #    notice, this list of conditions and the following disclaimer
    #    in the documentation and/or other materials provided with the
    #    distribution.
    # 
    # THIS DOCUMENTATION IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS "AS IS"
    # AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
    # THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
    # PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS
    # BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
    # OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
    # OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
    # BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
    # WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
    # OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS DOCUMENTATION,
    # EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
    #
    
    include("compat.inc");
    
    if (description)
    {
      script_id(106733);
      script_version("3.2");
      script_cvs_date("Date: 2018/11/10 11:49:46");
    
      script_name(english:"FreeBSD : exim -- a buffer overflow vulnerability, remote code execution (316b3c3e-0e98-11e8-8d41-97657151f8c2)");
      script_summary(english:"Checks for updated package in pkg_info output");
    
      script_set_attribute(
        attribute:"synopsis", 
        value:"The remote FreeBSD host is missing a security-related update."
      );
      script_set_attribute(
        attribute:"description", 
        value:
    "Exim developers report :
    
    There is a buffer overflow in base64d(), if some pre-conditions are
    met. Using a handcrafted message, remote code execution seems to be
    possible."
      );
      script_set_attribute(
        attribute:"see_also",
        value:"https://exim.org/static/doc/security/CVE-2018-6789.txt"
      );
      # https://vuxml.freebsd.org/freebsd/316b3c3e-0e98-11e8-8d41-97657151f8c2.html
      script_set_attribute(
        attribute:"see_also",
        value:"http://www.nessus.org/u?212493c5"
      );
      script_set_attribute(attribute:"solution", value:"Update the affected package.");
      script_set_attribute(attribute:"risk_factor", value:"High");
    
      script_set_attribute(attribute:"plugin_type", value:"local");
      script_set_attribute(attribute:"cpe", value:"p-cpe:/a:freebsd:freebsd:exim");
      script_set_attribute(attribute:"cpe", value:"cpe:/o:freebsd:freebsd");
    
      script_set_attribute(attribute:"vuln_publication_date", value:"2018/02/05");
      script_set_attribute(attribute:"patch_publication_date", value:"2018/02/10");
      script_set_attribute(attribute:"plugin_publication_date", value:"2018/02/12");
      script_end_attributes();
    
      script_category(ACT_GATHER_INFO);
      script_copyright(english:"This script is Copyright (C) 2018 and is owned by Tenable, Inc. or an Affiliate thereof.");
      script_family(english:"FreeBSD Local Security Checks");
    
      script_dependencies("ssh_get_info.nasl");
      script_require_keys("Host/local_checks_enabled", "Host/FreeBSD/release", "Host/FreeBSD/pkg_info");
    
      exit(0);
    }
    
    
    include("audit.inc");
    include("freebsd_package.inc");
    
    
    if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
    if (!get_kb_item("Host/FreeBSD/release")) audit(AUDIT_OS_NOT, "FreeBSD");
    if (!get_kb_item("Host/FreeBSD/pkg_info")) audit(AUDIT_PACKAGE_LIST_MISSING);
    
    
    flag = 0;
    
    if (pkg_test(save_report:TRUE, pkg:"exim<4.90.1")) flag++;
    
    if (flag)
    {
      if (report_verbosity > 0) security_hole(port:0, extra:pkg_report_get());
      else security_hole(0);
      exit(0);
    }
    else audit(AUDIT_HOST_NOT, "affected");
    
  • NASL familySuSE Local Security Checks
    NASL idOPENSUSE-2018-170.NASL
    descriptionThis update for exim fixes the following issues : - CVE-2018-6789: Fixed a buffer overflow in the base64decode function, which could be used to execute code remotely. (boo#1079832)
    last seen2020-06-05
    modified2018-02-20
    plugin id106888
    published2018-02-20
    reporterThis script is Copyright (C) 2018-2020 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/106888
    titleopenSUSE Security Update : exim (openSUSE-2018-170)
    code
    #%NASL_MIN_LEVEL 80502
    #
    # (C) Tenable Network Security, Inc.
    #
    # The descriptive text and package checks in this plugin were
    # extracted from openSUSE Security Update openSUSE-2018-170.
    #
    # The text description of this plugin is (C) SUSE LLC.
    #
    
    include("compat.inc");
    
    if (description)
    {
      script_id(106888);
      script_version("3.7");
      script_set_attribute(attribute:"plugin_modification_date", value:"2020/06/04");
    
      script_cve_id("CVE-2018-6789");
    
      script_name(english:"openSUSE Security Update : exim (openSUSE-2018-170)");
      script_summary(english:"Check for the openSUSE-2018-170 patch");
    
      script_set_attribute(
        attribute:"synopsis", 
        value:"The remote openSUSE host is missing a security update."
      );
      script_set_attribute(
        attribute:"description", 
        value:
    "This update for exim fixes the following issues :
    
      - CVE-2018-6789: Fixed a buffer overflow in the
        base64decode function, which could be used to execute
        code remotely. (boo#1079832)"
      );
      script_set_attribute(
        attribute:"see_also",
        value:"https://bugzilla.opensuse.org/show_bug.cgi?id=1079832"
      );
      script_set_attribute(attribute:"solution", value:"Update the affected exim packages.");
      script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P");
      script_set_cvss_temporal_vector("CVSS2#E:F/RL:OF/RC:C");
      script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H");
      script_set_cvss3_temporal_vector("CVSS:3.0/E:F/RL:O/RC:C");
      script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
      script_set_attribute(attribute:"exploit_available", value:"true");
      script_set_attribute(attribute:"exploit_framework_canvas", value:"true");
      script_set_attribute(attribute:"canvas_package", value:'CANVAS');
    
      script_set_attribute(attribute:"plugin_type", value:"local");
      script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:exim");
      script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:exim-debuginfo");
      script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:exim-debugsource");
      script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:eximon");
      script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:eximon-debuginfo");
      script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:eximstats-html");
      script_set_attribute(attribute:"cpe", value:"cpe:/o:novell:opensuse:42.3");
    
      script_set_attribute(attribute:"vuln_publication_date", value:"2018/02/08");
      script_set_attribute(attribute:"patch_publication_date", value:"2018/02/19");
      script_set_attribute(attribute:"plugin_publication_date", value:"2018/02/20");
      script_set_attribute(attribute:"in_the_news", value:"true");
      script_set_attribute(attribute:"generated_plugin", value:"current");
      script_end_attributes();
    
      script_category(ACT_GATHER_INFO);
      script_copyright(english:"This script is Copyright (C) 2018-2020 and is owned by Tenable, Inc. or an Affiliate thereof.");
      script_family(english:"SuSE Local Security Checks");
    
      script_dependencies("ssh_get_info.nasl");
      script_require_keys("Host/local_checks_enabled", "Host/SuSE/release", "Host/SuSE/rpm-list", "Host/cpu");
    
      exit(0);
    }
    
    
    include("audit.inc");
    include("global_settings.inc");
    include("rpm.inc");
    
    if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
    release = get_kb_item("Host/SuSE/release");
    if (isnull(release) || release =~ "^(SLED|SLES)") audit(AUDIT_OS_NOT, "openSUSE");
    if (release !~ "^(SUSE42\.3)$") audit(AUDIT_OS_RELEASE_NOT, "openSUSE", "42.3", release);
    if (!get_kb_item("Host/SuSE/rpm-list")) audit(AUDIT_PACKAGE_LIST_MISSING);
    
    ourarch = get_kb_item("Host/cpu");
    if (!ourarch) audit(AUDIT_UNKNOWN_ARCH);
    if (ourarch !~ "^(x86_64)$") audit(AUDIT_ARCH_NOT, "x86_64", ourarch);
    
    flag = 0;
    
    if ( rpm_check(release:"SUSE42.3", reference:"exim-4.86.2-20.1") ) flag++;
    if ( rpm_check(release:"SUSE42.3", reference:"exim-debuginfo-4.86.2-20.1") ) flag++;
    if ( rpm_check(release:"SUSE42.3", reference:"exim-debugsource-4.86.2-20.1") ) flag++;
    if ( rpm_check(release:"SUSE42.3", reference:"eximon-4.86.2-20.1") ) flag++;
    if ( rpm_check(release:"SUSE42.3", reference:"eximon-debuginfo-4.86.2-20.1") ) flag++;
    if ( rpm_check(release:"SUSE42.3", reference:"eximstats-html-4.86.2-20.1") ) flag++;
    
    if (flag)
    {
      if (report_verbosity > 0) security_hole(port:0, extra:rpm_report_get());
      else security_hole(0);
      exit(0);
    }
    else
    {
      tested = pkg_tests_get();
      if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
      else audit(AUDIT_PACKAGE_NOT_INSTALLED, "exim / exim-debuginfo / exim-debugsource / eximon / etc");
    }
    
  • NASL familyDebian Local Security Checks
    NASL idDEBIAN_DSA-4110.NASL
    descriptionMeh Chang discovered a buffer overflow flaw in a utility function used in the SMTP listener of Exim, a mail transport agent. A remote attacker can take advantage of this flaw to cause a denial of service, or potentially the execution of arbitrary code via a specially crafted message.
    last seen2020-06-01
    modified2020-06-02
    plugin id106728
    published2018-02-12
    reporterThis script is Copyright (C) 2018-2019 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/106728
    titleDebian DSA-4110-1 : exim4 - security update
    code
    #
    # (C) Tenable Network Security, Inc.
    #
    # The descriptive text and package checks in this plugin were  
    # extracted from Debian Security Advisory DSA-4110. The text 
    # itself is copyright (C) Software in the Public Interest, Inc.
    #
    
    include("compat.inc");
    
    if (description)
    {
      script_id(106728);
      script_version("3.8");
      script_cvs_date("Date: 2019/04/30 14:30:16");
    
      script_cve_id("CVE-2018-6789");
      script_xref(name:"DSA", value:"4110");
    
      script_name(english:"Debian DSA-4110-1 : exim4 - security update");
      script_summary(english:"Checks dpkg output for the updated package");
    
      script_set_attribute(
        attribute:"synopsis", 
        value:"The remote Debian host is missing a security-related update."
      );
      script_set_attribute(
        attribute:"description", 
        value:
    "Meh Chang discovered a buffer overflow flaw in a utility function used
    in the SMTP listener of Exim, a mail transport agent. A remote
    attacker can take advantage of this flaw to cause a denial of service,
    or potentially the execution of arbitrary code via a specially crafted
    message."
      );
      script_set_attribute(
        attribute:"see_also",
        value:"https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=890000"
      );
      script_set_attribute(
        attribute:"see_also",
        value:"https://security-tracker.debian.org/tracker/source-package/exim4"
      );
      script_set_attribute(
        attribute:"see_also",
        value:"https://packages.debian.org/source/jessie/exim4"
      );
      script_set_attribute(
        attribute:"see_also",
        value:"https://packages.debian.org/source/stretch/exim4"
      );
      script_set_attribute(
        attribute:"see_also",
        value:"https://www.debian.org/security/2018/dsa-4110"
      );
      script_set_attribute(
        attribute:"solution", 
        value:
    "Upgrade the exim4 packages.
    
    For the oldstable distribution (jessie), this problem has been fixed
    in version 4.84.2-2+deb8u5.
    
    For the stable distribution (stretch), this problem has been fixed in
    version 4.89-2+deb9u3."
      );
      script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P");
      script_set_cvss_temporal_vector("CVSS2#E:F/RL:OF/RC:C");
      script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H");
      script_set_cvss3_temporal_vector("CVSS:3.0/E:F/RL:O/RC:C");
      script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
      script_set_attribute(attribute:"exploit_available", value:"true");
      script_set_attribute(attribute:"exploit_framework_canvas", value:"true");
      script_set_attribute(attribute:"canvas_package", value:'CANVAS');
    
      script_set_attribute(attribute:"plugin_type", value:"local");
      script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:exim4");
      script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:8.0");
      script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:9.0");
    
      script_set_attribute(attribute:"vuln_publication_date", value:"2018/02/08");
      script_set_attribute(attribute:"patch_publication_date", value:"2018/02/10");
      script_set_attribute(attribute:"plugin_publication_date", value:"2018/02/12");
      script_set_attribute(attribute:"in_the_news", value:"true");
      script_set_attribute(attribute:"generated_plugin", value:"current");
      script_end_attributes();
    
      script_category(ACT_GATHER_INFO);
      script_copyright(english:"This script is Copyright (C) 2018-2019 and is owned by Tenable, Inc. or an Affiliate thereof.");
      script_family(english:"Debian Local Security Checks");
    
      script_dependencies("ssh_get_info.nasl");
      script_require_keys("Host/local_checks_enabled", "Host/Debian/release", "Host/Debian/dpkg-l");
    
      exit(0);
    }
    
    
    include("audit.inc");
    include("debian_package.inc");
    
    
    if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
    if (!get_kb_item("Host/Debian/release")) audit(AUDIT_OS_NOT, "Debian");
    if (!get_kb_item("Host/Debian/dpkg-l")) audit(AUDIT_PACKAGE_LIST_MISSING);
    
    
    flag = 0;
    if (deb_check(release:"8.0", prefix:"exim4", reference:"4.84.2-2+deb8u5")) flag++;
    if (deb_check(release:"8.0", prefix:"exim4-base", reference:"4.84.2-2+deb8u5")) flag++;
    if (deb_check(release:"8.0", prefix:"exim4-config", reference:"4.84.2-2+deb8u5")) flag++;
    if (deb_check(release:"8.0", prefix:"exim4-daemon-heavy", reference:"4.84.2-2+deb8u5")) flag++;
    if (deb_check(release:"8.0", prefix:"exim4-daemon-heavy-dbg", reference:"4.84.2-2+deb8u5")) flag++;
    if (deb_check(release:"8.0", prefix:"exim4-daemon-light", reference:"4.84.2-2+deb8u5")) flag++;
    if (deb_check(release:"8.0", prefix:"exim4-daemon-light-dbg", reference:"4.84.2-2+deb8u5")) flag++;
    if (deb_check(release:"8.0", prefix:"exim4-dbg", reference:"4.84.2-2+deb8u5")) flag++;
    if (deb_check(release:"8.0", prefix:"exim4-dev", reference:"4.84.2-2+deb8u5")) flag++;
    if (deb_check(release:"8.0", prefix:"eximon4", reference:"4.84.2-2+deb8u5")) flag++;
    if (deb_check(release:"9.0", prefix:"exim4", reference:"4.89-2+deb9u3")) flag++;
    if (deb_check(release:"9.0", prefix:"exim4-base", reference:"4.89-2+deb9u3")) flag++;
    if (deb_check(release:"9.0", prefix:"exim4-config", reference:"4.89-2+deb9u3")) flag++;
    if (deb_check(release:"9.0", prefix:"exim4-daemon-heavy", reference:"4.89-2+deb9u3")) flag++;
    if (deb_check(release:"9.0", prefix:"exim4-daemon-heavy-dbg", reference:"4.89-2+deb9u3")) flag++;
    if (deb_check(release:"9.0", prefix:"exim4-daemon-light", reference:"4.89-2+deb9u3")) flag++;
    if (deb_check(release:"9.0", prefix:"exim4-daemon-light-dbg", reference:"4.89-2+deb9u3")) flag++;
    if (deb_check(release:"9.0", prefix:"exim4-dbg", reference:"4.89-2+deb9u3")) flag++;
    if (deb_check(release:"9.0", prefix:"exim4-dev", reference:"4.89-2+deb9u3")) flag++;
    if (deb_check(release:"9.0", prefix:"eximon4", reference:"4.89-2+deb9u3")) flag++;
    
    if (flag)
    {
      if (report_verbosity > 0) security_hole(port:0, extra:deb_report_get());
      else security_hole(0);
      exit(0);
    }
    else audit(AUDIT_HOST_NOT, "affected");
    
  • NASL familyGentoo Local Security Checks
    NASL idGENTOO_GLSA-201803-01.NASL
    descriptionThe remote host is affected by the vulnerability described in GLSA-201803-01 (Exim: Multiple vulnerabilities) Multiple vulnerabilities have been discovered in Exim. Please review the CVE identifiers referenced below for details. Impact : A remote attacker, by connecting to the SMTP listener daemon, could possibly execute arbitrary code with the privileges of the process or cause a Denial of Service condition. Workaround : There is no known workaround at this time.
    last seen2020-06-01
    modified2020-06-02
    plugin id107178
    published2018-03-07
    reporterThis script is Copyright (C) 2018-2019 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/107178
    titleGLSA-201803-01 : Exim: Multiple vulnerabilities
    code
    #
    # (C) Tenable Network Security, Inc.
    #
    # The descriptive text and package checks in this plugin were
    # extracted from Gentoo Linux Security Advisory GLSA 201803-01.
    #
    # The advisory text is Copyright (C) 2001-2019 Gentoo Foundation, Inc.
    # and licensed under the Creative Commons - Attribution / Share Alike 
    # license. See http://creativecommons.org/licenses/by-sa/3.0/
    #
    
    include("compat.inc");
    
    if (description)
    {
      script_id(107178);
      script_version("1.5");
      script_cvs_date("Date: 2019/04/30 14:30:16");
    
      script_cve_id("CVE-2017-16943", "CVE-2017-16944", "CVE-2018-6789");
      script_xref(name:"GLSA", value:"201803-01");
    
      script_name(english:"GLSA-201803-01 : Exim: Multiple vulnerabilities");
      script_summary(english:"Checks for updated package(s) in /var/db/pkg");
    
      script_set_attribute(
        attribute:"synopsis", 
        value:
    "The remote Gentoo host is missing one or more security-related
    patches."
      );
      script_set_attribute(
        attribute:"description", 
        value:
    "The remote host is affected by the vulnerability described in GLSA-201803-01
    (Exim: Multiple vulnerabilities)
    
        Multiple vulnerabilities have been discovered in Exim. Please review the
          CVE identifiers referenced below for details.
      
    Impact :
    
        A remote attacker, by connecting to the SMTP listener daemon, could
          possibly execute arbitrary code with the privileges of the process or
          cause a Denial of Service condition.
      
    Workaround :
    
        There is no known workaround at this time."
      );
      script_set_attribute(
        attribute:"see_also",
        value:"https://security.gentoo.org/glsa/201803-01"
      );
      script_set_attribute(
        attribute:"solution", 
        value:
    "All Exim users should upgrade to the latest version:
          # emerge --sync
          # emerge --ask --oneshot --verbose '>=mail-mta/exim-4.90.1'"
      );
      script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P");
      script_set_cvss_temporal_vector("CVSS2#E:F/RL:OF/RC:C");
      script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H");
      script_set_cvss3_temporal_vector("CVSS:3.0/E:F/RL:O/RC:C");
      script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
      script_set_attribute(attribute:"exploit_available", value:"true");
      script_set_attribute(attribute:"exploit_framework_canvas", value:"true");
      script_set_attribute(attribute:"canvas_package", value:'CANVAS');
    
      script_set_attribute(attribute:"plugin_type", value:"local");
      script_set_attribute(attribute:"cpe", value:"p-cpe:/a:gentoo:linux:exim");
      script_set_attribute(attribute:"cpe", value:"cpe:/o:gentoo:linux");
    
      script_set_attribute(attribute:"vuln_publication_date", value:"2017/11/25");
      script_set_attribute(attribute:"patch_publication_date", value:"2018/03/06");
      script_set_attribute(attribute:"plugin_publication_date", value:"2018/03/07");
      script_set_attribute(attribute:"in_the_news", value:"true");
      script_set_attribute(attribute:"generated_plugin", value:"current");
      script_end_attributes();
    
      script_category(ACT_GATHER_INFO);
      script_copyright(english:"This script is Copyright (C) 2018-2019 and is owned by Tenable, Inc. or an Affiliate thereof.");
      script_family(english:"Gentoo Local Security Checks");
    
      script_dependencies("ssh_get_info.nasl");
      script_require_keys("Host/local_checks_enabled", "Host/Gentoo/release", "Host/Gentoo/qpkg-list");
    
      exit(0);
    }
    
    
    include("audit.inc");
    include("global_settings.inc");
    include("qpkg.inc");
    
    if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
    if (!get_kb_item("Host/Gentoo/release")) audit(AUDIT_OS_NOT, "Gentoo");
    if (!get_kb_item("Host/Gentoo/qpkg-list")) audit(AUDIT_PACKAGE_LIST_MISSING);
    
    
    flag = 0;
    
    if (qpkg_check(package:"mail-mta/exim", unaffected:make_list("ge 4.90.1"), vulnerable:make_list("lt 4.90.1"))) flag++;
    
    if (flag)
    {
      if (report_verbosity > 0) security_hole(port:0, extra:qpkg_report_get());
      else security_hole(0);
      exit(0);
    }
    else
    {
      tested = qpkg_tests_get();
      if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
      else audit(AUDIT_PACKAGE_NOT_INSTALLED, "Exim");
    }
    
  • NASL familyAmazon Linux Local Security Checks
    NASL idALA_ALAS-2018-970.NASL
    descriptionBuffer overflow in b64decode() function, possibly leading to remote code execution : An issue was discovered in the base64d function in the SMTP listener in Exim before 4.90.1. By sending a handcrafted message, a buffer overflow may happen. This can be used to execute code remotely. (CVE-2018-6789)
    last seen2020-06-01
    modified2020-06-02
    plugin id107241
    published2018-03-09
    reporterThis script is Copyright (C) 2018-2019 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/107241
    titleAmazon Linux AMI : exim (ALAS-2018-970)
    code
    #
    # (C) Tenable Network Security, Inc.
    #
    # The descriptive text and package checks in this plugin were
    # extracted from Amazon Linux AMI Security Advisory ALAS-2018-970.
    #
    
    include("compat.inc");
    
    if (description)
    {
      script_id(107241);
      script_version("1.7");
      script_cvs_date("Date: 2019/04/30 14:30:16");
    
      script_cve_id("CVE-2018-6789");
      script_xref(name:"ALAS", value:"2018-970");
    
      script_name(english:"Amazon Linux AMI : exim (ALAS-2018-970)");
      script_summary(english:"Checks rpm output for the updated packages");
    
      script_set_attribute(
        attribute:"synopsis", 
        value:"The remote Amazon Linux AMI host is missing a security update."
      );
      script_set_attribute(
        attribute:"description", 
        value:
    "Buffer overflow in b64decode() function, possibly leading to remote
    code execution :
    
    An issue was discovered in the base64d function in the SMTP listener
    in Exim before 4.90.1. By sending a handcrafted message, a buffer
    overflow may happen. This can be used to execute code remotely.
    (CVE-2018-6789)"
      );
      script_set_attribute(
        attribute:"see_also",
        value:"https://alas.aws.amazon.com/ALAS-2018-970.html"
      );
      script_set_attribute(
        attribute:"solution", 
        value:"Run 'yum update exim' to update your system."
      );
      script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P");
      script_set_cvss_temporal_vector("CVSS2#E:F/RL:OF/RC:C");
      script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H");
      script_set_cvss3_temporal_vector("CVSS:3.0/E:F/RL:O/RC:C");
      script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
      script_set_attribute(attribute:"exploit_available", value:"true");
      script_set_attribute(attribute:"exploit_framework_canvas", value:"true");
      script_set_attribute(attribute:"canvas_package", value:'CANVAS');
    
      script_set_attribute(attribute:"plugin_type", value:"local");
      script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:exim");
      script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:exim-debuginfo");
      script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:exim-greylist");
      script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:exim-mon");
      script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:exim-mysql");
      script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:exim-pgsql");
      script_set_attribute(attribute:"cpe", value:"cpe:/o:amazon:linux");
    
      script_set_attribute(attribute:"vuln_publication_date", value:"2018/02/08");
      script_set_attribute(attribute:"patch_publication_date", value:"2018/03/08");
      script_set_attribute(attribute:"plugin_publication_date", value:"2018/03/09");
      script_set_attribute(attribute:"in_the_news", value:"true");
      script_set_attribute(attribute:"generated_plugin", value:"current");
      script_end_attributes();
    
      script_category(ACT_GATHER_INFO);
      script_copyright(english:"This script is Copyright (C) 2018-2019 and is owned by Tenable, Inc. or an Affiliate thereof.");
      script_family(english:"Amazon Linux Local Security Checks");
    
      script_dependencies("ssh_get_info.nasl");
      script_require_keys("Host/local_checks_enabled", "Host/AmazonLinux/release", "Host/AmazonLinux/rpm-list");
    
      exit(0);
    }
    
    
    include("audit.inc");
    include("global_settings.inc");
    include("rpm.inc");
    
    
    if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
    
    release = get_kb_item("Host/AmazonLinux/release");
    if (isnull(release) || !strlen(release)) audit(AUDIT_OS_NOT, "Amazon Linux");
    os_ver = pregmatch(pattern: "^AL(A|\d)", string:release);
    if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, "Amazon Linux");
    os_ver = os_ver[1];
    if (os_ver != "A")
    {
      if (os_ver == 'A') os_ver = 'AMI';
      audit(AUDIT_OS_NOT, "Amazon Linux AMI", "Amazon Linux " + os_ver);
    }
    
    if (!get_kb_item("Host/AmazonLinux/rpm-list")) audit(AUDIT_PACKAGE_LIST_MISSING);
    
    
    flag = 0;
    if (rpm_check(release:"ALA", reference:"exim-4.90.1-2.14.amzn1")) flag++;
    if (rpm_check(release:"ALA", reference:"exim-debuginfo-4.90.1-2.14.amzn1")) flag++;
    if (rpm_check(release:"ALA", reference:"exim-greylist-4.90.1-2.14.amzn1")) flag++;
    if (rpm_check(release:"ALA", reference:"exim-mon-4.90.1-2.14.amzn1")) flag++;
    if (rpm_check(release:"ALA", reference:"exim-mysql-4.90.1-2.14.amzn1")) flag++;
    if (rpm_check(release:"ALA", reference:"exim-pgsql-4.90.1-2.14.amzn1")) flag++;
    
    if (flag)
    {
      if (report_verbosity > 0) security_hole(port:0, extra:rpm_report_get());
      else security_hole(0);
      exit(0);
    }
    else
    {
      tested = pkg_tests_get();
      if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
      else audit(AUDIT_PACKAGE_NOT_INSTALLED, "exim / exim-debuginfo / exim-greylist / exim-mon / exim-mysql / etc");
    }
    
  • NASL familyFedora Local Security Checks
    NASL idFEDORA_2018-5AEC14E125.NASL
    descriptionThis is an update fixing mysql module. ---- This is new version fixing CVE-2018-6789. Note that Tenable Network Security has extracted the preceding description block directly from the Fedora update system website. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.
    last seen2020-06-05
    modified2018-02-27
    plugin id107009
    published2018-02-27
    reporterThis script is Copyright (C) 2018-2020 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/107009
    titleFedora 27 : exim (2018-5aec14e125)
    code
    #%NASL_MIN_LEVEL 80502
    #
    # (C) Tenable Network Security, Inc.
    #
    # The descriptive text and package checks in this plugin were  
    # extracted from Fedora Security Advisory FEDORA-2018-5aec14e125.
    #
    
    include("compat.inc");
    
    if (description)
    {
      script_id(107009);
      script_version("3.8");
      script_set_attribute(attribute:"plugin_modification_date", value:"2020/06/04");
    
      script_cve_id("CVE-2018-6789");
      script_xref(name:"FEDORA", value:"2018-5aec14e125");
    
      script_name(english:"Fedora 27 : exim (2018-5aec14e125)");
      script_summary(english:"Checks rpm output for the updated package.");
    
      script_set_attribute(
        attribute:"synopsis", 
        value:"The remote Fedora host is missing a security update."
      );
      script_set_attribute(
        attribute:"description", 
        value:
    "This is an update fixing mysql module.
    
    ----
    
    This is new version fixing CVE-2018-6789.
    
    Note that Tenable Network Security has extracted the preceding
    description block directly from the Fedora update system website.
    Tenable has attempted to automatically clean and format it as much as
    possible without introducing additional issues."
      );
      script_set_attribute(
        attribute:"see_also",
        value:"https://bodhi.fedoraproject.org/updates/FEDORA-2018-5aec14e125"
      );
      script_set_attribute(attribute:"solution", value:"Update the affected exim package.");
      script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P");
      script_set_cvss_temporal_vector("CVSS2#E:F/RL:OF/RC:C");
      script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H");
      script_set_cvss3_temporal_vector("CVSS:3.0/E:F/RL:O/RC:C");
      script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
      script_set_attribute(attribute:"exploit_available", value:"true");
      script_set_attribute(attribute:"exploit_framework_canvas", value:"true");
      script_set_attribute(attribute:"canvas_package", value:'CANVAS');
    
      script_set_attribute(attribute:"plugin_type", value:"local");
      script_set_attribute(attribute:"cpe", value:"p-cpe:/a:fedoraproject:fedora:exim");
      script_set_attribute(attribute:"cpe", value:"cpe:/o:fedoraproject:fedora:27");
    
      script_set_attribute(attribute:"vuln_publication_date", value:"2018/02/08");
      script_set_attribute(attribute:"patch_publication_date", value:"2018/02/26");
      script_set_attribute(attribute:"plugin_publication_date", value:"2018/02/27");
      script_set_attribute(attribute:"in_the_news", value:"true");
      script_set_attribute(attribute:"generated_plugin", value:"current");
      script_end_attributes();
    
      script_category(ACT_GATHER_INFO);
      script_copyright(english:"This script is Copyright (C) 2018-2020 and is owned by Tenable, Inc. or an Affiliate thereof.");
      script_family(english:"Fedora Local Security Checks");
    
      script_dependencies("ssh_get_info.nasl");
      script_require_keys("Host/local_checks_enabled", "Host/RedHat/release", "Host/RedHat/rpm-list");
    
      exit(0);
    }
    
    
    include("audit.inc");
    include("global_settings.inc");
    include("rpm.inc");
    
    
    if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
    release = get_kb_item("Host/RedHat/release");
    if (isnull(release) || "Fedora" >!< release) audit(AUDIT_OS_NOT, "Fedora");
    os_ver = pregmatch(pattern: "Fedora.*release ([0-9]+)", string:release);
    if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, "Fedora");
    os_ver = os_ver[1];
    if (! preg(pattern:"^27([^0-9]|$)", string:os_ver)) audit(AUDIT_OS_NOT, "Fedora 27", "Fedora " + os_ver);
    
    if (!get_kb_item("Host/RedHat/rpm-list")) audit(AUDIT_PACKAGE_LIST_MISSING);
    
    
    cpu = get_kb_item("Host/cpu");
    if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
    if ("x86_64" >!< cpu && cpu !~ "^i[3-6]86$") audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, "Fedora", cpu);
    
    
    flag = 0;
    if (rpm_check(release:"FC27", reference:"exim-4.90.1-2.fc27")) flag++;
    
    
    if (flag)
    {
      security_report_v4(
        port       : 0,
        severity   : SECURITY_HOLE,
        extra      : rpm_report_get()
      );
      exit(0);
    }
    else
    {
      tested = pkg_tests_get();
      if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
      else audit(AUDIT_PACKAGE_NOT_INSTALLED, "exim");
    }
    
  • NASL familyFedora Local Security Checks
    NASL idFEDORA_2018-25A7BA3CB6.NASL
    descriptionThis is an update fixing mysql module. ---- This is new version fixing CVE-2018-6789. Note that Tenable Network Security has extracted the preceding description block directly from the Fedora update system website. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.
    last seen2020-06-05
    modified2018-02-27
    plugin id107007
    published2018-02-27
    reporterThis script is Copyright (C) 2018-2020 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/107007
    titleFedora 26 : exim (2018-25a7ba3cb6)
    code
    #%NASL_MIN_LEVEL 80502
    #
    # (C) Tenable Network Security, Inc.
    #
    # The descriptive text and package checks in this plugin were  
    # extracted from Fedora Security Advisory FEDORA-2018-25a7ba3cb6.
    #
    
    include("compat.inc");
    
    if (description)
    {
      script_id(107007);
      script_version("3.8");
      script_set_attribute(attribute:"plugin_modification_date", value:"2020/06/04");
    
      script_cve_id("CVE-2018-6789");
      script_xref(name:"FEDORA", value:"2018-25a7ba3cb6");
    
      script_name(english:"Fedora 26 : exim (2018-25a7ba3cb6)");
      script_summary(english:"Checks rpm output for the updated package.");
    
      script_set_attribute(
        attribute:"synopsis", 
        value:"The remote Fedora host is missing a security update."
      );
      script_set_attribute(
        attribute:"description", 
        value:
    "This is an update fixing mysql module.
    
    ----
    
    This is new version fixing CVE-2018-6789.
    
    Note that Tenable Network Security has extracted the preceding
    description block directly from the Fedora update system website.
    Tenable has attempted to automatically clean and format it as much as
    possible without introducing additional issues."
      );
      script_set_attribute(
        attribute:"see_also",
        value:"https://bodhi.fedoraproject.org/updates/FEDORA-2018-25a7ba3cb6"
      );
      script_set_attribute(attribute:"solution", value:"Update the affected exim package.");
      script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P");
      script_set_cvss_temporal_vector("CVSS2#E:F/RL:OF/RC:C");
      script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H");
      script_set_cvss3_temporal_vector("CVSS:3.0/E:F/RL:O/RC:C");
      script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
      script_set_attribute(attribute:"exploit_available", value:"true");
      script_set_attribute(attribute:"exploit_framework_canvas", value:"true");
      script_set_attribute(attribute:"canvas_package", value:'CANVAS');
    
      script_set_attribute(attribute:"plugin_type", value:"local");
      script_set_attribute(attribute:"cpe", value:"p-cpe:/a:fedoraproject:fedora:exim");
      script_set_attribute(attribute:"cpe", value:"cpe:/o:fedoraproject:fedora:26");
    
      script_set_attribute(attribute:"vuln_publication_date", value:"2018/02/08");
      script_set_attribute(attribute:"patch_publication_date", value:"2018/02/26");
      script_set_attribute(attribute:"plugin_publication_date", value:"2018/02/27");
      script_set_attribute(attribute:"in_the_news", value:"true");
      script_set_attribute(attribute:"generated_plugin", value:"current");
      script_end_attributes();
    
      script_category(ACT_GATHER_INFO);
      script_copyright(english:"This script is Copyright (C) 2018-2020 and is owned by Tenable, Inc. or an Affiliate thereof.");
      script_family(english:"Fedora Local Security Checks");
    
      script_dependencies("ssh_get_info.nasl");
      script_require_keys("Host/local_checks_enabled", "Host/RedHat/release", "Host/RedHat/rpm-list");
    
      exit(0);
    }
    
    
    include("audit.inc");
    include("global_settings.inc");
    include("rpm.inc");
    
    
    if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
    release = get_kb_item("Host/RedHat/release");
    if (isnull(release) || "Fedora" >!< release) audit(AUDIT_OS_NOT, "Fedora");
    os_ver = pregmatch(pattern: "Fedora.*release ([0-9]+)", string:release);
    if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, "Fedora");
    os_ver = os_ver[1];
    if (! preg(pattern:"^26([^0-9]|$)", string:os_ver)) audit(AUDIT_OS_NOT, "Fedora 26", "Fedora " + os_ver);
    
    if (!get_kb_item("Host/RedHat/rpm-list")) audit(AUDIT_PACKAGE_LIST_MISSING);
    
    
    cpu = get_kb_item("Host/cpu");
    if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
    if ("x86_64" >!< cpu && cpu !~ "^i[3-6]86$") audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, "Fedora", cpu);
    
    
    flag = 0;
    if (rpm_check(release:"FC26", reference:"exim-4.90.1-2.fc26")) flag++;
    
    
    if (flag)
    {
      security_report_v4(
        port       : 0,
        severity   : SECURITY_HOLE,
        extra      : rpm_report_get()
      );
      exit(0);
    }
    else
    {
      tested = pkg_tests_get();
      if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
      else audit(AUDIT_PACKAGE_NOT_INSTALLED, "exim");
    }
    
  • NASL familyDebian Local Security Checks
    NASL idDEBIAN_DLA-1274.NASL
    descriptionMeh Chang discovered a buffer overflow flaw in a utility function used in the SMTP listener of Exim, a mail transport agent. A remote attacker can take advantage of this flaw to cause a denial of service, or potentially the execution of arbitrary code via a specially crafted message. For Debian 7
    last seen2020-03-17
    modified2018-02-12
    plugin id106722
    published2018-02-12
    reporterThis script is Copyright (C) 2018-2020 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/106722
    titleDebian DLA-1274-1 : exim4 security update
    code
    #%NASL_MIN_LEVEL 80502
    #
    # (C) Tenable Network Security, Inc.
    #
    # The descriptive text and package checks in this plugin were
    # extracted from Debian Security Advisory DLA-1274-1. The text
    # itself is copyright (C) Software in the Public Interest, Inc.
    #
    
    include("compat.inc");
    
    if (description)
    {
      script_id(106722);
      script_version("3.9");
      script_set_attribute(attribute:"plugin_modification_date", value:"2020/03/12");
    
      script_cve_id("CVE-2018-6789");
    
      script_name(english:"Debian DLA-1274-1 : exim4 security update");
      script_summary(english:"Checks dpkg output for the updated packages.");
    
      script_set_attribute(
        attribute:"synopsis", 
        value:"The remote Debian host is missing a security update."
      );
      script_set_attribute(
        attribute:"description", 
        value:
    "Meh Chang discovered a buffer overflow flaw in a utility function used
    in the SMTP listener of Exim, a mail transport agent. A remote
    attacker can take advantage of this flaw to cause a denial of service,
    or potentially the execution of arbitrary code via a specially crafted
    message.
    
    For Debian 7 'Wheezy', this problem has been fixed in version
    4.80-7+deb7u6.
    
    We recommend that you upgrade your exim4 packages.
    
    NOTE: Tenable Network Security has extracted the preceding description
    block directly from the DLA security advisory. Tenable has attempted
    to automatically clean and format it as much as possible without
    introducing additional issues."
      );
      script_set_attribute(
        attribute:"see_also",
        value:"https://lists.debian.org/debian-lts-announce/2018/02/msg00009.html"
      );
      script_set_attribute(
        attribute:"see_also",
        value:"https://packages.debian.org/source/wheezy/exim4"
      );
      script_set_attribute(attribute:"solution", value:"Upgrade the affected packages.");
      script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P");
      script_set_cvss_temporal_vector("CVSS2#E:F/RL:OF/RC:C");
      script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H");
      script_set_cvss3_temporal_vector("CVSS:3.0/E:F/RL:O/RC:C");
      script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
      script_set_attribute(attribute:"exploit_available", value:"true");
      script_set_attribute(attribute:"exploit_framework_canvas", value:"true");
      script_set_attribute(attribute:"canvas_package", value:'CANVAS');
    
      script_set_attribute(attribute:"plugin_type", value:"local");
      script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:exim4");
      script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:exim4-base");
      script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:exim4-config");
      script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:exim4-daemon-heavy");
      script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:exim4-daemon-heavy-dbg");
      script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:exim4-daemon-light");
      script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:exim4-daemon-light-dbg");
      script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:exim4-dbg");
      script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:exim4-dev");
      script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:eximon4");
      script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:7.0");
    
      script_set_attribute(attribute:"vuln_publication_date", value:"2018/02/08");
      script_set_attribute(attribute:"patch_publication_date", value:"2018/02/10");
      script_set_attribute(attribute:"plugin_publication_date", value:"2018/02/12");
      script_set_attribute(attribute:"in_the_news", value:"true");
      script_set_attribute(attribute:"generated_plugin", value:"current");
      script_end_attributes();
    
      script_category(ACT_GATHER_INFO);
      script_copyright(english:"This script is Copyright (C) 2018-2020 and is owned by Tenable, Inc. or an Affiliate thereof.");
      script_family(english:"Debian Local Security Checks");
    
      script_dependencies("ssh_get_info.nasl");
      script_require_keys("Host/local_checks_enabled", "Host/Debian/release", "Host/Debian/dpkg-l");
    
      exit(0);
    }
    
    
    include("audit.inc");
    include("debian_package.inc");
    
    
    if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
    if (!get_kb_item("Host/Debian/release")) audit(AUDIT_OS_NOT, "Debian");
    if (!get_kb_item("Host/Debian/dpkg-l")) audit(AUDIT_PACKAGE_LIST_MISSING);
    
    
    flag = 0;
    if (deb_check(release:"7.0", prefix:"exim4", reference:"4.80-7+deb7u6")) flag++;
    if (deb_check(release:"7.0", prefix:"exim4-base", reference:"4.80-7+deb7u6")) flag++;
    if (deb_check(release:"7.0", prefix:"exim4-config", reference:"4.80-7+deb7u6")) flag++;
    if (deb_check(release:"7.0", prefix:"exim4-daemon-heavy", reference:"4.80-7+deb7u6")) flag++;
    if (deb_check(release:"7.0", prefix:"exim4-daemon-heavy-dbg", reference:"4.80-7+deb7u6")) flag++;
    if (deb_check(release:"7.0", prefix:"exim4-daemon-light", reference:"4.80-7+deb7u6")) flag++;
    if (deb_check(release:"7.0", prefix:"exim4-daemon-light-dbg", reference:"4.80-7+deb7u6")) flag++;
    if (deb_check(release:"7.0", prefix:"exim4-dbg", reference:"4.80-7+deb7u6")) flag++;
    if (deb_check(release:"7.0", prefix:"exim4-dev", reference:"4.80-7+deb7u6")) flag++;
    if (deb_check(release:"7.0", prefix:"eximon4", reference:"4.80-7+deb7u6")) flag++;
    
    if (flag)
    {
      if (report_verbosity > 0) security_hole(port:0, extra:deb_report_get());
      else security_hole(0);
      exit(0);
    }
    else audit(AUDIT_HOST_NOT, "affected");
    

Packetstorm

Saint

bid103049
descriptionExim SMTP listener base64d function one-character buffer overflow
idmail_smtp_eximver
titleexim_smtp_listener_base64d_bo
typeremote

Seebug

bulletinFamilyexploit
descriptionAn issue was discovered in the base64d function in the SMTP listener in Exim before 4.90.1. By sending a handcrafted message, a buffer overflow may happen. This can be used to execute code remotely.
idSSV:97269
last seen2018-06-26
modified2018-05-04
published2018-05-04
reporterMy Seebug
sourcehttps://www.seebug.org/vuldb/ssvid-97269
titleExim < 4.90.1 - base64d Remote Code Execution(CVE-2018-6789)