Vulnerabilities > CVE-2020-10957 - NULL Pointer Dereference vulnerability in Dovecot

#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Ubuntu Security Notice USN-4361-1. 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(136708);
  script_version("1.3");
  script_set_attribute(attribute:"plugin_modification_date", value:"2020/05/26");

  script_cve_id("CVE-2020-10957", "CVE-2020-10958", "CVE-2020-10967");
  script_xref(name:"USN", value:"4361-1");

  script_name(english:"Ubuntu 19.10 / 20.04 : dovecot vulnerabilities (USN-4361-1)");
  script_summary(english:"Checks dpkg output for updated package.");

  script_set_attribute(
    attribute:"synopsis",
    value:"The remote Ubuntu host is missing a security-related patch."
  );
  script_set_attribute(
    attribute:"description",
    value:
"Philippe Antoine discovered that Dovecot incorrectly handled certain
data. An attacker could possibly use this issue to cause a denial of
service. (CVE-2020-10957, CVE-2020-10967)

Philippe Antoine discovered that Dovecot incorrectly handled certain
data. An attacker could possibly use this issue to cause a denial of
service or execute arbitrary code. (CVE-2020-10958).

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/4361-1/"
  );
  script_set_attribute(
    attribute:"solution",
    value:"Update the affected dovecot-core package."
  );
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:P");
  script_set_cvss_temporal_vector("CVSS2#E:POC/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:P/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2020-10967");
  script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"true");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:dovecot-core");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:19.10");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:20.04");

  script_set_attribute(attribute:"vuln_publication_date", value:"2020/05/18");
  script_set_attribute(attribute:"patch_publication_date", value:"2020/05/18");
  script_set_attribute(attribute:"plugin_publication_date", value:"2020/05/19");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"Ubuntu Security Notice (C) 2020 Canonical, Inc. / NASL script (C) 2020 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:"^(19\.10|20\.04)$", string:release)) audit(AUDIT_OS_NOT, "Ubuntu 19.10 / 20.04", "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:"19.10", pkgname:"dovecot-core", pkgver:"1:2.3.4.1-5ubuntu3.1")) flag++;
if (ubuntu_check(osver:"20.04", pkgname:"dovecot-core", pkgver:"1:2.3.7.2-1ubuntu3.1")) flag++;

if (flag)
{
  security_report_v4(
    port       : 0,
    severity   : SECURITY_WARNING,
    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, "dovecot-core");
}

#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were  
# extracted from Fedora Security Advisory FEDORA-2020-b60344c987.
#

include("compat.inc");

if (description)
{
  script_id(136938);
  script_version("1.2");
  script_set_attribute(attribute:"plugin_modification_date", value:"2020/06/05");

  script_cve_id("CVE-2020-10957", "CVE-2020-10958", "CVE-2020-10967");
  script_xref(name:"FEDORA", value:"2020-b60344c987");

  script_name(english:"Fedora 31 : 1:dovecot (2020-b60344c987)");
  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:
"  - CVE-2020-10957: lmtp/submission: A client can crash the
    server by sending a NOOP command with an invalid string
    parameter. This occurs particularly for a parameter that
    doesn't start with a double quote. This applies to all
    SMTP services, including submission-login, which makes
    it possible to crash the submission service without
    authentication.

  - CVE-2020-10958: lmtp/submission: Sending many invalid or
    unknown commands can cause the server to access freed
    memory, which can lead to a server crash. This happens
    when the server closes the connection with a '421 Too
    many invalid commands' error. The bad command limit
    depends on the service (lmtp or submission) and varies
    between 10 to 20 bad commands.

  - CVE-2020-10967: lmtp/submission: Issuing the RCPT
    command with an address that has the empty quoted string
    as local-part causes the lmtp service to crash.

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-2020-b60344c987"
  );
  script_set_attribute(
    attribute:"solution",
    value:"Update the affected 1:dovecot package."
  );
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:P");
  script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2020-10967");
  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"true");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:fedoraproject:fedora:1:dovecot");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:fedoraproject:fedora:31");

  script_set_attribute(attribute:"vuln_publication_date", value:"2020/05/18");
  script_set_attribute(attribute:"patch_publication_date", value:"2020/05/28");
  script_set_attribute(attribute:"plugin_publication_date", value:"2020/05/28");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 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:"^31([^0-9]|$)", string:os_ver)) audit(AUDIT_OS_NOT, "Fedora 31", "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:"FC31", reference:"dovecot-2.3.10.1-1.fc31", epoch:"1")) flag++;


if (flag)
{
  security_report_v4(
    port       : 0,
    severity   : SECURITY_WARNING,
    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, "1:dovecot");
}

#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were  
# extracted from the FreeBSD VuXML database :
#
# Copyright 2003-2020 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(136706);
  script_version("1.3");
  script_set_attribute(attribute:"plugin_modification_date", value:"2020/05/26");

  script_cve_id("CVE-2020-10957", "CVE-2020-10958", "CVE-2020-10967");

  script_name(english:"FreeBSD : Dovecot -- Multiple vulnerabilities (37d106a8-15a4-483e-8247-fcb68b16eaf8)");
  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:
"Aki Tuomi reports :

Vulnerability Details : Sending malformed NOOP command causes crash in
submission, submission-login or lmtp service.

Risk : Remote attacker can keep submission-login service down, causing
denial of service attack. For lmtp the risk is neglible, as lmtp is
usually behind a trusted MTA.

Steps to reproduce : Send ``NOOP EE'FY`` to submission port, or
similarly malformed command.

Vulnerability Details :

Sending command followed by sufficient number of newlines triggers a
use-after-free bug that might crash submission-login, submission or
lmtp service.

Risk :

Remote attacker can keep submission-login service down, causing denial
of service attack. For lmtp the risk is neglible, as lmtp is usually
behind a trusted MTA.

Steps to reproduce :

This can be currently reproduced with ASAN or Valgrind. Reliable way
to crash has not yet been discovered.

Vulnerability Details : Sending mail with empty quoted localpart
causes submission or lmtp component to crash.

Risk : Malicious actor can cause denial of service to mail delivery by
repeatedly sending mails with bad sender or recipient address.

Steps to reproduce : Send mail with envelope sender or recipient as
<''@example.org>.

Workaround : For submission there is no workaround, but triggering the
bug requires valid credentials. For lmtp, one can implement sufficient
filtering on MTA level to prevent mails with such addresses from
ending up in LMTP delivery."
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://dovecot.org/pipermail/dovecot-news/2020-May/000438.html"
  );
  # https://vuxml.freebsd.org/freebsd/37d106a8-15a4-483e-8247-fcb68b16eaf8.html
  script_set_attribute(
    attribute:"see_also",
    value:"http://www.nessus.org/u?3f67388d"
  );
  script_set_attribute(attribute:"solution", value:"Update the affected package.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:P");
  script_set_cvss_temporal_vector("CVSS2#E:POC/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:P/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2020-10967");
  script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"true");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:freebsd:freebsd:dovecot");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:freebsd:freebsd");

  script_set_attribute(attribute:"vuln_publication_date", value:"2020/04/02");
  script_set_attribute(attribute:"patch_publication_date", value:"2020/05/18");
  script_set_attribute(attribute:"plugin_publication_date", value:"2020/05/19");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2020 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:"dovecot<2.3.10.1")) flag++;

if (flag)
{
  if (report_verbosity > 0) security_warning(port:0, extra:pkg_report_get());
  else security_warning(0);
  exit(0);
}
else audit(AUDIT_HOST_NOT, "affected");

#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from openSUSE Security Update openSUSE-2020-720.
#
# The text description of this plugin is (C) SUSE LLC.
#

include("compat.inc");

if (description)
{
  script_id(136961);
  script_version("1.2");
  script_set_attribute(attribute:"plugin_modification_date", value:"2020/06/05");

  script_cve_id("CVE-2020-10957", "CVE-2020-10958", "CVE-2020-10967");

  script_name(english:"openSUSE Security Update : dovecot23 (openSUSE-2020-720)");
  script_summary(english:"Check for the openSUSE-2020-720 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 dovecot23 to 2.3.10 fixes the following issues :

Security issues fixed :

  - CVE-2020-10957: Fixed a crash caused by malformed NOOP
    commands (bsc#1171457).

  - CVE-2020-10958: Fixed a use-after-free when receiving
    too many newlines (bsc#1171458).

  - CVE-2020-10967: Fixed a crash in the lmtp and submission
    components caused by mails with empty quoted localparts
    (bsc#1171456).

Non-security issues fixed :

  - The update to 2.3.10 fixes several bugs. Please refer to
    https://dovecot.org/doc/NEWS for a complete list of
    changes.

This update was imported from the SUSE:SLE-15-SP1:Update update
project."
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.opensuse.org/show_bug.cgi?id=1171456"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.opensuse.org/show_bug.cgi?id=1171457"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.opensuse.org/show_bug.cgi?id=1171458"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://dovecot.org/doc/NEWS"
  );
  script_set_attribute(
    attribute:"solution",
    value:"Update the affected dovecot23 packages."
  );
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:P");
  script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2020-10967");
  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"true");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:dovecot23");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:dovecot23-backend-mysql");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:dovecot23-backend-mysql-debuginfo");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:dovecot23-backend-pgsql");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:dovecot23-backend-pgsql-debuginfo");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:dovecot23-backend-sqlite");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:dovecot23-backend-sqlite-debuginfo");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:dovecot23-debuginfo");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:dovecot23-debugsource");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:dovecot23-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:dovecot23-fts");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:dovecot23-fts-debuginfo");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:dovecot23-fts-lucene");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:dovecot23-fts-lucene-debuginfo");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:dovecot23-fts-solr");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:dovecot23-fts-solr-debuginfo");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:dovecot23-fts-squat");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:dovecot23-fts-squat-debuginfo");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:novell:opensuse:15.1");

  script_set_attribute(attribute:"vuln_publication_date", value:"2020/05/18");
  script_set_attribute(attribute:"patch_publication_date", value:"2020/05/26");
  script_set_attribute(attribute:"plugin_publication_date", value:"2020/05/29");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 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 !~ "^(SUSE15\.1)$") audit(AUDIT_OS_RELEASE_NOT, "openSUSE", "15.1", 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:"SUSE15.1", reference:"dovecot23-2.3.10-lp151.2.9.1") ) flag++;
if ( rpm_check(release:"SUSE15.1", reference:"dovecot23-backend-mysql-2.3.10-lp151.2.9.1") ) flag++;
if ( rpm_check(release:"SUSE15.1", reference:"dovecot23-backend-mysql-debuginfo-2.3.10-lp151.2.9.1") ) flag++;
if ( rpm_check(release:"SUSE15.1", reference:"dovecot23-backend-pgsql-2.3.10-lp151.2.9.1") ) flag++;
if ( rpm_check(release:"SUSE15.1", reference:"dovecot23-backend-pgsql-debuginfo-2.3.10-lp151.2.9.1") ) flag++;
if ( rpm_check(release:"SUSE15.1", reference:"dovecot23-backend-sqlite-2.3.10-lp151.2.9.1") ) flag++;
if ( rpm_check(release:"SUSE15.1", reference:"dovecot23-backend-sqlite-debuginfo-2.3.10-lp151.2.9.1") ) flag++;
if ( rpm_check(release:"SUSE15.1", reference:"dovecot23-debuginfo-2.3.10-lp151.2.9.1") ) flag++;
if ( rpm_check(release:"SUSE15.1", reference:"dovecot23-debugsource-2.3.10-lp151.2.9.1") ) flag++;
if ( rpm_check(release:"SUSE15.1", reference:"dovecot23-devel-2.3.10-lp151.2.9.1") ) flag++;
if ( rpm_check(release:"SUSE15.1", reference:"dovecot23-fts-2.3.10-lp151.2.9.1") ) flag++;
if ( rpm_check(release:"SUSE15.1", reference:"dovecot23-fts-debuginfo-2.3.10-lp151.2.9.1") ) flag++;
if ( rpm_check(release:"SUSE15.1", reference:"dovecot23-fts-lucene-2.3.10-lp151.2.9.1") ) flag++;
if ( rpm_check(release:"SUSE15.1", reference:"dovecot23-fts-lucene-debuginfo-2.3.10-lp151.2.9.1") ) flag++;
if ( rpm_check(release:"SUSE15.1", reference:"dovecot23-fts-solr-2.3.10-lp151.2.9.1") ) flag++;
if ( rpm_check(release:"SUSE15.1", reference:"dovecot23-fts-solr-debuginfo-2.3.10-lp151.2.9.1") ) flag++;
if ( rpm_check(release:"SUSE15.1", reference:"dovecot23-fts-squat-2.3.10-lp151.2.9.1") ) flag++;
if ( rpm_check(release:"SUSE15.1", reference:"dovecot23-fts-squat-debuginfo-2.3.10-lp151.2.9.1") ) 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, "dovecot23 / dovecot23-backend-mysql / etc");
}

#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were  
# extracted from Fedora Security Advisory FEDORA-2020-1dee17d880.
#

include("compat.inc");

if (description)
{
  script_id(137106);
  script_version("1.2");
  script_set_attribute(attribute:"plugin_modification_date", value:"2020/06/09");

  script_cve_id("CVE-2020-10957", "CVE-2020-10958", "CVE-2020-10967");
  script_xref(name:"FEDORA", value:"2020-1dee17d880");

  script_name(english:"Fedora 32 : 1:dovecot (2020-1dee17d880)");
  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:
"  - CVE-2020-10957: lmtp/submission: A client can crash the
    server by sending a NOOP command with an invalid string
    parameter. This occurs particularly for a parameter that
    doesn't start with a double quote. This applies to all
    SMTP services, including submission-login, which makes
    it possible to crash the submission service without
    authentication.

  - CVE-2020-10958: lmtp/submission: Sending many invalid or
    unknown commands can cause the server to access freed
    memory, which can lead to a server crash. This happens
    when the server closes the connection with a '421 Too
    many invalid commands' error. The bad command limit
    depends on the service (lmtp or submission) and varies
    between 10 to 20 bad commands.

  - CVE-2020-10967: lmtp/submission: Issuing the RCPT
    command with an address that has the empty quoted string
    as local-part causes the lmtp service to crash.

----

dovecot updated to 2.3.10

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-2020-1dee17d880"
  );
  script_set_attribute(
    attribute:"solution",
    value:"Update the affected 1:dovecot package."
  );
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:P");
  script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2020-10967");
  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"true");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:fedoraproject:fedora:1:dovecot");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:fedoraproject:fedora:32");

  script_set_attribute(attribute:"vuln_publication_date", value:"2020/05/18");
  script_set_attribute(attribute:"patch_publication_date", value:"2020/05/24");
  script_set_attribute(attribute:"plugin_publication_date", value:"2020/06/04");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 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:"^32([^0-9]|$)", string:os_ver)) audit(AUDIT_OS_NOT, "Fedora 32", "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:"FC32", reference:"dovecot-2.3.10.1-1.fc32", epoch:"1")) flag++;


if (flag)
{
  security_report_v4(
    port       : 0,
    severity   : SECURITY_WARNING,
    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, "1:dovecot");
}

#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were  
# extracted from Debian Security Advisory DSA-4690. The text 
# itself is copyright (C) Software in the Public Interest, Inc.
#

include("compat.inc");

if (description)
{
  script_id(136754);
  script_version("1.2");
  script_set_attribute(attribute:"plugin_modification_date", value:"2020/05/26");

  script_cve_id("CVE-2020-10957", "CVE-2020-10958", "CVE-2020-10967");
  script_xref(name:"DSA", value:"4690");

  script_name(english:"Debian DSA-4690-1 : dovecot - 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:
"Several vulnerabilities were discovered in the Dovecot email server,
which could cause crashes in the submission, submission-login or lmtp
services, resulting in denial of service."
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=960963"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://security-tracker.debian.org/tracker/source-package/dovecot"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://packages.debian.org/source/buster/dovecot"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://www.debian.org/security/2020/dsa-4690"
  );
  script_set_attribute(
    attribute:"solution",
    value:
"Upgrade the dovecot packages.

For the stable distribution (buster), these problems have been fixed
in version 1:2.3.4.1-5+deb10u2."
  );
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:P");
  script_set_cvss_temporal_vector("CVSS2#E:POC/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:P/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2020-10967");
  script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"true");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:dovecot");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:10.0");

  script_set_attribute(attribute:"vuln_publication_date", value:"2020/05/18");
  script_set_attribute(attribute:"patch_publication_date", value:"2020/05/20");
  script_set_attribute(attribute:"plugin_publication_date", value:"2020/05/21");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 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:"10.0", prefix:"dovecot-auth-lua", reference:"1:2.3.4.1-5+deb10u2")) flag++;
if (deb_check(release:"10.0", prefix:"dovecot-core", reference:"1:2.3.4.1-5+deb10u2")) flag++;
if (deb_check(release:"10.0", prefix:"dovecot-dev", reference:"1:2.3.4.1-5+deb10u2")) flag++;
if (deb_check(release:"10.0", prefix:"dovecot-gssapi", reference:"1:2.3.4.1-5+deb10u2")) flag++;
if (deb_check(release:"10.0", prefix:"dovecot-imapd", reference:"1:2.3.4.1-5+deb10u2")) flag++;
if (deb_check(release:"10.0", prefix:"dovecot-ldap", reference:"1:2.3.4.1-5+deb10u2")) flag++;
if (deb_check(release:"10.0", prefix:"dovecot-lmtpd", reference:"1:2.3.4.1-5+deb10u2")) flag++;
if (deb_check(release:"10.0", prefix:"dovecot-lucene", reference:"1:2.3.4.1-5+deb10u2")) flag++;
if (deb_check(release:"10.0", prefix:"dovecot-managesieved", reference:"1:2.3.4.1-5+deb10u2")) flag++;
if (deb_check(release:"10.0", prefix:"dovecot-mysql", reference:"1:2.3.4.1-5+deb10u2")) flag++;
if (deb_check(release:"10.0", prefix:"dovecot-pgsql", reference:"1:2.3.4.1-5+deb10u2")) flag++;
if (deb_check(release:"10.0", prefix:"dovecot-pop3d", reference:"1:2.3.4.1-5+deb10u2")) flag++;
if (deb_check(release:"10.0", prefix:"dovecot-sieve", reference:"1:2.3.4.1-5+deb10u2")) flag++;
if (deb_check(release:"10.0", prefix:"dovecot-solr", reference:"1:2.3.4.1-5+deb10u2")) flag++;
if (deb_check(release:"10.0", prefix:"dovecot-sqlite", reference:"1:2.3.4.1-5+deb10u2")) flag++;
if (deb_check(release:"10.0", prefix:"dovecot-submissiond", reference:"1:2.3.4.1-5+deb10u2")) flag++;

if (flag)
{
  if (report_verbosity > 0) security_warning(port:0, extra:deb_report_get());
  else security_warning(0);
  exit(0);
}
else audit(AUDIT_HOST_NOT, "affected");