Vulnerabilities > CVE-2017-2816 - Improper Restriction of Operations within the Bounds of a Memory Buffer vulnerability in multiple products

047910
CVSS 8.8 - HIGH
Attack vector
NETWORK
Attack complexity
LOW
Privileges required
NONE
Confidentiality impact
HIGH
Integrity impact
HIGH
Availability impact
HIGH
network
low complexity
libofx-project
debian
CWE-119
nessus

Summary

An exploitable buffer overflow vulnerability exists in the tag parsing functionality of LibOFX 0.9.11. A specially crafted OFX file can cause a write out of bounds resulting in a buffer overflow on the stack. An attacker can construct a malicious OFX file to trigger this vulnerability.

Vulnerable Configurations

Part Description Count
Application
Libofx_Project
1
OS
Debian
1

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.

Nessus

  • NASL familySuSE Local Security Checks
    NASL idSUSE_SU-2018-2064-1.NASL
    descriptionThis update for libofx fixes the following issues: Security issues fixed : - CVE-2017-2816: Fix an exploitable buffer overflow vulnerability in the tag parsing functionality (bsc#1058673). - CVE-2017-2920: Fix a buffer overflow vulnerability in sanitize_proprietary_tags in lib/ofx_preproc.cpp (bsc#1061964). - CVE-2017-14731: Fix remote denial of service via a crafted file in ofx_proc_file in ofx_preproc.cpp (bsc#1060437). Note that Tenable Network Security has extracted the preceding description block directly from the SUSE 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 id111368
    published2018-07-27
    reporterThis script is Copyright (C) 2018-2019 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/111368
    titleSUSE SLED12 Security Update : libofx (SUSE-SU-2018:2064-1)
    code
    #
    # (C) Tenable Network Security, Inc.
    #
    # The descriptive text and package checks in this plugin were
    # extracted from SUSE update advisory SUSE-SU-2018:2064-1.
    # The text itself is copyright (C) SUSE.
    #
    
    include("compat.inc");
    
    if (description)
    {
      script_id(111368);
      script_version("1.4");
      script_cvs_date("Date: 2019/09/10 13:51:48");
    
      script_cve_id("CVE-2017-14731", "CVE-2017-2816", "CVE-2017-2920");
    
      script_name(english:"SUSE SLED12 Security Update : libofx (SUSE-SU-2018:2064-1)");
      script_summary(english:"Checks rpm output for the updated packages.");
    
      script_set_attribute(
        attribute:"synopsis", 
        value:"The remote SUSE host is missing one or more security updates."
      );
      script_set_attribute(
        attribute:"description", 
        value:
    "This update for libofx fixes the following issues: Security issues
    fixed :
    
      - CVE-2017-2816: Fix an exploitable buffer overflow
        vulnerability in the tag parsing functionality
        (bsc#1058673).
    
      - CVE-2017-2920: Fix a buffer overflow vulnerability in
        sanitize_proprietary_tags in lib/ofx_preproc.cpp
        (bsc#1061964).
    
      - CVE-2017-14731: Fix remote denial of service via a
        crafted file in ofx_proc_file in ofx_preproc.cpp
        (bsc#1060437).
    
    Note that Tenable Network Security has extracted the preceding
    description block directly from the SUSE 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://bugzilla.suse.com/show_bug.cgi?id=1058673"
      );
      script_set_attribute(
        attribute:"see_also",
        value:"https://bugzilla.suse.com/show_bug.cgi?id=1060437"
      );
      script_set_attribute(
        attribute:"see_also",
        value:"https://bugzilla.suse.com/show_bug.cgi?id=1061964"
      );
      script_set_attribute(
        attribute:"see_also",
        value:"https://www.suse.com/security/cve/CVE-2017-14731/"
      );
      script_set_attribute(
        attribute:"see_also",
        value:"https://www.suse.com/security/cve/CVE-2017-2816/"
      );
      script_set_attribute(
        attribute:"see_also",
        value:"https://www.suse.com/security/cve/CVE-2017-2920/"
      );
      # https://www.suse.com/support/update/announcement/2018/suse-su-20182064-1/
      script_set_attribute(
        attribute:"see_also",
        value:"http://www.nessus.org/u?302a626d"
      );
      script_set_attribute(
        attribute:"solution", 
        value:
    "To install this SUSE Security Update use the SUSE recommended
    installation methods like YaST online_update or 'zypper patch'.
    
    Alternatively you can run the command listed for your product :
    
    SUSE Linux Enterprise Workstation Extension 12-SP3:zypper in -t patch
    SUSE-SLE-WE-12-SP3-2018-1408=1
    
    SUSE Linux Enterprise Software Development Kit 12-SP3:zypper in -t
    patch SUSE-SLE-SDK-12-SP3-2018-1408=1
    
    SUSE Linux Enterprise Desktop 12-SP3:zypper in -t patch
    SUSE-SLE-DESKTOP-12-SP3-2018-1408=1"
      );
      script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:N/C:P/I:P/A:P");
      script_set_cvss_temporal_vector("CVSS2#E:POC/RL:U/RC:ND");
      script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H");
      script_set_cvss3_temporal_vector("CVSS:3.0/E:P/RL:U/RC:X");
    
      script_set_attribute(attribute:"plugin_type", value:"local");
      script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:libofx");
      script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:libofx-debuginfo");
      script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:libofx-debugsource");
      script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:libofx6");
      script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:libofx6-debuginfo");
      script_set_attribute(attribute:"cpe", value:"cpe:/o:novell:suse_linux:12");
    
      script_set_attribute(attribute:"vuln_publication_date", value:"2017/09/13");
      script_set_attribute(attribute:"patch_publication_date", value:"2018/07/26");
      script_set_attribute(attribute:"plugin_publication_date", value:"2018/07/27");
      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:"SuSE Local Security Checks");
    
      script_dependencies("ssh_get_info.nasl");
      script_require_keys("Host/local_checks_enabled", "Host/cpu", "Host/SuSE/release", "Host/SuSE/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/SuSE/release");
    if (isnull(release) || release !~ "^(SLED|SLES)") audit(AUDIT_OS_NOT, "SUSE");
    os_ver = pregmatch(pattern: "^(SLE(S|D)\d+)", string:release);
    if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, "SUSE");
    os_ver = os_ver[1];
    if (! preg(pattern:"^(SLED12)$", string:os_ver)) audit(AUDIT_OS_NOT, "SUSE SLED12", "SUSE " + os_ver);
    
    if (!get_kb_item("Host/SuSE/rpm-list")) audit(AUDIT_PACKAGE_LIST_MISSING);
    
    cpu = get_kb_item("Host/cpu");
    if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
    if (cpu !~ "^i[3-6]86$" && "x86_64" >!< cpu && "s390x" >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, "SUSE " + os_ver, cpu);
    if (cpu >!< "x86_64") audit(AUDIT_ARCH_NOT, "x86_64", cpu);
    
    
    sp = get_kb_item("Host/SuSE/patchlevel");
    if (isnull(sp)) sp = "0";
    if (os_ver == "SLED12" && (! preg(pattern:"^(3)$", string:sp))) audit(AUDIT_OS_NOT, "SLED12 SP3", os_ver + " SP" + sp);
    
    
    flag = 0;
    if (rpm_check(release:"SLED12", sp:"3", cpu:"x86_64", reference:"libofx-0.9.9-3.7.1")) flag++;
    if (rpm_check(release:"SLED12", sp:"3", cpu:"x86_64", reference:"libofx-debuginfo-0.9.9-3.7.1")) flag++;
    if (rpm_check(release:"SLED12", sp:"3", cpu:"x86_64", reference:"libofx-debugsource-0.9.9-3.7.1")) flag++;
    if (rpm_check(release:"SLED12", sp:"3", cpu:"x86_64", reference:"libofx6-0.9.9-3.7.1")) flag++;
    if (rpm_check(release:"SLED12", sp:"3", cpu:"x86_64", reference:"libofx6-debuginfo-0.9.9-3.7.1")) flag++;
    
    
    if (flag)
    {
      if (report_verbosity > 0) security_warning(port:0, extra:rpm_report_get());
      else security_warning(0);
      exit(0);
    }
    else
    {
      tested = pkg_tests_get();
      if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
      else audit(AUDIT_PACKAGE_NOT_INSTALLED, "libofx");
    }
    
  • NASL familySuSE Local Security Checks
    NASL idOPENSUSE-2018-820.NASL
    descriptionThis update for libofx fixes the following issues : The following security vulnerabilities have been addressed : - CVE-2017-2920: Fixed an exploitable buffer overflow in the tag parsing functionality, which could result in an out of bounds write and could be triggered via a specially crafted OFX file (boo#1061964) - CVE-2017-2816: Fixed another buffer overflow in the tag parsing functionality, which could result in an stack overflow and could be triggered via a specially crafted OFX file (boo#1058673)
    last seen2020-06-05
    modified2018-08-08
    plugin id111585
    published2018-08-08
    reporterThis script is Copyright (C) 2018-2020 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/111585
    titleopenSUSE Security Update : libofx (openSUSE-2018-820)
  • NASL familyFreeBSD Local Security Checks
    NASL idFREEBSD_PKG_58FAFEADCD13472FA9BDD0173BA1B04C.NASL
    descriptionTalos developers report : An exploitable buffer overflow vulnerability exists in the tag parsing functionality of LibOFX 0.9.11. A specially crafted OFX file can cause a write out of bounds resulting in a buffer overflow on the stack. An attacker can construct a malicious OFX file to trigger this vulnerability.
    last seen2020-06-01
    modified2020-06-02
    plugin id103524
    published2017-09-28
    reporterThis script is Copyright (C) 2017-2018 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/103524
    titleFreeBSD : libofx -- exploitable buffer overflow (58fafead-cd13-472f-a9bd-d0173ba1b04c)
  • NASL familyGentoo Local Security Checks
    NASL idGENTOO_GLSA-201908-26.NASL
    descriptionThe remote host is affected by the vulnerability described in GLSA-201908-26 (libofx: Multiple vulnerabilities) Multiple vulnerabilities have been discovered in libofx. Please review the CVE identifiers referenced below for details. Impact : A remote attacker could entice a user to process a specially crafted file using an application linked against libofx, possibly resulting in execution of arbitrary code with the privileges of the process or a Denial of Service condition. Workaround : There is no known workaround at this time.
    last seen2020-06-01
    modified2020-06-02
    plugin id128441
    published2019-09-03
    reporterThis script is Copyright (C) 2019 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/128441
    titleGLSA-201908-26 : libofx: Multiple vulnerabilities
  • NASL familyDebian Local Security Checks
    NASL idDEBIAN_DLA-1192.NASL
    descriptionCVE-2017-2816 An exploitable buffer overflow vulnerability exists in the tag parsing functionality of LibOFX 0.9.11. A specially crafted OFX file can cause a write out of bounds resulting in a buffer overflow on the stack. An attacker can construct a malicious OFX file to trigger this vulnerability. CVE-2017-14731 ofx_proc_file in ofx_preproc.cpp allows remote attackers to cause a denial of service (heap-based buffer over-read and application crash) via a crafted file For Debian 7
    last seen2020-03-17
    modified2017-11-27
    plugin id104751
    published2017-11-27
    reporterThis script is Copyright (C) 2017-2020 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/104751
    titleDebian DLA-1192-1 : libofx security update

Talos

idTALOS-2017-0317
last seen2019-05-29
published2017-09-13
reporterTalos Intelligence
sourcehttp://www.talosintelligence.com/vulnerability_reports/TALOS-2017-0317
titleLibOFX Tag Parsing Code Execution Vulnerability