Vulnerabilities > CVE-2017-16803 - Improper Restriction of Operations within the Bounds of a Memory Buffer vulnerability in Libav

#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Gentoo Linux Security Advisory GLSA 201811-19.
#
# The advisory text is Copyright (C) 2001-2018 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(119164);
  script_version("1.1");
  script_cvs_date("Date: 2018/11/27 13:31:29");

  script_cve_id("CVE-2017-16803", "CVE-2017-7862");
  script_xref(name:"GLSA", value:"201811-19");

  script_name(english:"GLSA-201811-19 : Libav: 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-201811-19
(Libav: Multiple vulnerabilities)

    Multiple vulnerabilities have been discovered in Libav. Please review
      the CVE identifiers referenced below for details.
  
Impact :

    A remote attacker, via a crafted Smacker stream, could 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/201811-19"
  );
  script_set_attribute(
    attribute:"solution", 
    value:
"All Libav users should upgrade to the latest version:
      # emerge --sync
      # emerge --ask --oneshot --verbose '>=media-video/libav-12.3'"
  );
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P");
  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_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:gentoo:linux:libav");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:gentoo:linux");

  script_set_attribute(attribute:"patch_publication_date", value:"2018/11/27");
  script_set_attribute(attribute:"plugin_publication_date", value:"2018/11/27");
  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:"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:"media-video/libav", unaffected:make_list("ge 12.3"), vulnerable:make_list("lt 12.3"))) 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, "Libav");
}

#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were  
# extracted from Debian Security Advisory DSA-4119. The text 
# itself is copyright (C) Software in the Public Interest, Inc.
#

include("compat.inc");

if (description)
{
  script_id(106877);
  script_version("3.3");
  script_cvs_date("Date: 2018/11/13 12:30:46");

  script_cve_id("CVE-2017-16803");
  script_xref(name:"DSA", value:"4119");

  script_name(english:"Debian DSA-4119-1 : libav - 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 security issues have been corrected in multiple demuxers and
decoders of the libav multimedia library. A full list of the changes
is available at
https://git.libav.org/?p=libav.git;a=blob;f=Changelog;hb=refs/tags/v11
.12"
  );
  # https://git.libav.org/?p=libav.git;a=blob;f=Changelog;hb=refs/tags/v11.12
  script_set_attribute(
    attribute:"see_also",
    value:"http://www.nessus.org/u?098b7b94"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://security-tracker.debian.org/tracker/source-package/libav"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://packages.debian.org/source/jessie/libav"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://www.debian.org/security/2018/dsa-4119"
  );
  script_set_attribute(
    attribute:"solution", 
    value:
"Upgrade the libav packages.

For the oldstable distribution (jessie), this problem has been fixed
in version 6:11.12-1~deb8u1."
  );
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:P");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libav");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:8.0");

  script_set_attribute(attribute:"patch_publication_date", value:"2018/02/19");
  script_set_attribute(attribute:"plugin_publication_date", value:"2018/02/20");
  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:"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:"libav-dbg", reference:"6:11.12-1~deb8u1")) flag++;
if (deb_check(release:"8.0", prefix:"libav-doc", reference:"6:11.12-1~deb8u1")) flag++;
if (deb_check(release:"8.0", prefix:"libav-tools", reference:"6:11.12-1~deb8u1")) flag++;
if (deb_check(release:"8.0", prefix:"libavcodec-dev", reference:"6:11.12-1~deb8u1")) flag++;
if (deb_check(release:"8.0", prefix:"libavcodec-extra", reference:"6:11.12-1~deb8u1")) flag++;
if (deb_check(release:"8.0", prefix:"libavcodec-extra-56", reference:"6:11.12-1~deb8u1")) flag++;
if (deb_check(release:"8.0", prefix:"libavcodec56", reference:"6:11.12-1~deb8u1")) flag++;
if (deb_check(release:"8.0", prefix:"libavdevice-dev", reference:"6:11.12-1~deb8u1")) flag++;
if (deb_check(release:"8.0", prefix:"libavdevice55", reference:"6:11.12-1~deb8u1")) flag++;
if (deb_check(release:"8.0", prefix:"libavfilter-dev", reference:"6:11.12-1~deb8u1")) flag++;
if (deb_check(release:"8.0", prefix:"libavfilter5", reference:"6:11.12-1~deb8u1")) flag++;
if (deb_check(release:"8.0", prefix:"libavformat-dev", reference:"6:11.12-1~deb8u1")) flag++;
if (deb_check(release:"8.0", prefix:"libavformat56", reference:"6:11.12-1~deb8u1")) flag++;
if (deb_check(release:"8.0", prefix:"libavresample-dev", reference:"6:11.12-1~deb8u1")) flag++;
if (deb_check(release:"8.0", prefix:"libavresample2", reference:"6:11.12-1~deb8u1")) flag++;
if (deb_check(release:"8.0", prefix:"libavutil-dev", reference:"6:11.12-1~deb8u1")) flag++;
if (deb_check(release:"8.0", prefix:"libavutil54", reference:"6:11.12-1~deb8u1")) flag++;
if (deb_check(release:"8.0", prefix:"libswscale-dev", reference:"6:11.12-1~deb8u1")) flag++;
if (deb_check(release:"8.0", prefix:"libswscale3", reference:"6:11.12-1~deb8u1")) 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");