Debian DSA-3644-1 : fontconfig - 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 DSA-3644. The text 
# itself is copyright (C) Software in the Public Interest, Inc.
#

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

if (description)
{
  script_id(92795);
  script_version("2.11");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/01/29");

  script_cve_id("CVE-2016-5384");
  script_xref(name:"DSA", value:"3644");

  script_name(english:"Debian DSA-3644-1 : fontconfig - security update");

  script_set_attribute(attribute:"synopsis", value:
"The remote Debian host is missing a security-related update.");
  script_set_attribute(attribute:"description", value:
"Tobias Stoeckmann discovered that cache files are insufficiently
validated in fontconfig, a generic font configuration library. An
attacker can trigger arbitrary free() calls, which in turn allows
double free attacks and therefore arbitrary code execution. In
combination with setuid binaries using crafted cache files, this could
allow privilege escalation.");
  script_set_attribute(attribute:"see_also", value:"https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=833570");
  script_set_attribute(attribute:"see_also", value:"https://packages.debian.org/source/jessie/fontconfig");
  script_set_attribute(attribute:"see_also", value:"https://www.debian.org/security/2016/dsa-3644");
  script_set_attribute(attribute:"solution", value:
"Upgrade the fontconfig packages.

For the stable distribution (jessie), this problem has been fixed in
version 2.11.0-6.3+deb8u1.");
  script_set_cvss_base_vector("CVSS2#AV:L/AC:L/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:L/AC:L/PR:L/UI:N/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:"cvss_score_source", value:"CVE-2016-5384");

  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"false");

  script_set_attribute(attribute:"patch_publication_date", value:"2016/08/08");
  script_set_attribute(attribute:"plugin_publication_date", value:"2016/08/09");

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

  script_category(ACT_GATHER_INFO);
  script_family(english:"Debian Local Security Checks");

  script_copyright(english:"This script is Copyright (C) 2016-2026 and is owned by Tenable, Inc. or an Affiliate thereof.");

  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:"fontconfig", reference:"2.11.0-6.3+deb8u1")) flag++;
if (deb_check(release:"8.0", prefix:"fontconfig-config", reference:"2.11.0-6.3+deb8u1")) flag++;
if (deb_check(release:"8.0", prefix:"libfontconfig1", reference:"2.11.0-6.3+deb8u1")) flag++;
if (deb_check(release:"8.0", prefix:"libfontconfig1-dbg", reference:"2.11.0-6.3+deb8u1")) flag++;
if (deb_check(release:"8.0", prefix:"libfontconfig1-dev", reference:"2.11.0-6.3+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");