Debian DLA-1809-1 : libav security update

#%NASL_MIN_LEVEL 70300
#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Debian Security Advisory DLA-1809-1. The text
# itself is copyright (C) Software in the Public Interest, Inc.
#

include('deprecated_nasl_level.inc');
include('compat.inc');

if (description)
{
  script_id(125555);
  script_version("1.4");
  script_set_attribute(attribute:"plugin_modification_date", value:"2021/01/11");

  script_cve_id("CVE-2018-15822", "CVE-2019-11338");

  script_name(english:"Debian DLA-1809-1 : libav 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:
"Two more security issues have been corrected in multiple demuxers and
decoders of the libav multimedia library.

CVE-2018-15822

The flv_write_packet function in libavformat/flvenc.c in libav did not
check for an empty audio packet, leading to an assertion failure.

CVE-2019-11338

libavcodec/hevcdec.c in libav mishandled detection of duplicate first
slices, which allowed remote attackers to cause a denial of service
(NULL pointer dereference and out-of-array access) or possibly have
unspecified other impact via crafted HEVC data.

For Debian 8 'Jessie', these problems have been fixed in version
6:11.12-1~deb8u7.

We recommend that you upgrade your libav 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/2019/05/msg00043.html"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://packages.debian.org/source/jessie/libav"
  );
  script_set_attribute(attribute:"solution", value:"Upgrade the affected packages.");
  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:U/RL:OF/RC:C");
  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:U/RL:O/RC:C");
  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libav-dbg");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libav-doc");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libav-tools");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libavcodec-dev");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libavcodec-extra");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libavcodec-extra-56");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libavcodec56");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libavdevice-dev");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libavdevice55");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libavfilter-dev");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libavfilter5");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libavformat-dev");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libavformat56");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libavresample-dev");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libavresample2");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libavutil-dev");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libavutil54");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libswscale-dev");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libswscale3");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:8.0");

  script_set_attribute(attribute:"vuln_publication_date", value:"2018/08/23");
  script_set_attribute(attribute:"patch_publication_date", value:"2019/05/29");
  script_set_attribute(attribute:"plugin_publication_date", value:"2019/05/30");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2019-2021 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~deb8u7")) flag++;
if (deb_check(release:"8.0", prefix:"libav-doc", reference:"6:11.12-1~deb8u7")) flag++;
if (deb_check(release:"8.0", prefix:"libav-tools", reference:"6:11.12-1~deb8u7")) flag++;
if (deb_check(release:"8.0", prefix:"libavcodec-dev", reference:"6:11.12-1~deb8u7")) flag++;
if (deb_check(release:"8.0", prefix:"libavcodec-extra", reference:"6:11.12-1~deb8u7")) flag++;
if (deb_check(release:"8.0", prefix:"libavcodec-extra-56", reference:"6:11.12-1~deb8u7")) flag++;
if (deb_check(release:"8.0", prefix:"libavcodec56", reference:"6:11.12-1~deb8u7")) flag++;
if (deb_check(release:"8.0", prefix:"libavdevice-dev", reference:"6:11.12-1~deb8u7")) flag++;
if (deb_check(release:"8.0", prefix:"libavdevice55", reference:"6:11.12-1~deb8u7")) flag++;
if (deb_check(release:"8.0", prefix:"libavfilter-dev", reference:"6:11.12-1~deb8u7")) flag++;
if (deb_check(release:"8.0", prefix:"libavfilter5", reference:"6:11.12-1~deb8u7")) flag++;
if (deb_check(release:"8.0", prefix:"libavformat-dev", reference:"6:11.12-1~deb8u7")) flag++;
if (deb_check(release:"8.0", prefix:"libavformat56", reference:"6:11.12-1~deb8u7")) flag++;
if (deb_check(release:"8.0", prefix:"libavresample-dev", reference:"6:11.12-1~deb8u7")) flag++;
if (deb_check(release:"8.0", prefix:"libavresample2", reference:"6:11.12-1~deb8u7")) flag++;
if (deb_check(release:"8.0", prefix:"libavutil-dev", reference:"6:11.12-1~deb8u7")) flag++;
if (deb_check(release:"8.0", prefix:"libavutil54", reference:"6:11.12-1~deb8u7")) flag++;
if (deb_check(release:"8.0", prefix:"libswscale-dev", reference:"6:11.12-1~deb8u7")) flag++;
if (deb_check(release:"8.0", prefix:"libswscale3", reference:"6:11.12-1~deb8u7")) 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");