Debian DLA-2498-1 : xerces-c security update

#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Debian Security Advisory DLA-2498-1. The text
# itself is copyright (C) Software in the Public Interest, Inc.
#

include('compat.inc');

if (description)
{
  script_id(144444);
  script_version("1.3");
  script_set_attribute(attribute:"plugin_modification_date", value:"2024/02/01");

  script_cve_id("CVE-2018-1311");

  script_name(english:"Debian DLA-2498-1 : xerces-c security update");

  script_set_attribute(attribute:"synopsis", value:
"The remote Debian host is missing a security update.");
  script_set_attribute(attribute:"description", value:
"The UK's National Cyber Security Centre (NCSC) discovered that
Xerces-C, a validating XML parser library for C++, contains a
use-after-free error triggered during the scanning of external DTDs.
An attacker could cause a Denial of Service (DoS) and possibly achieve
remote code execution. This flaw has not been addressed in the
maintained version of the library and has no complete mitigation. The
first is provided by this update which fixes the use-after-free
vulnerability at the expense of a memory leak. The other is to disable
DTD processing, which can be accomplished via the DOM using a standard
parser feature, or via SAX using the XERCES_DISABLE_DTD environment
variable.

For Debian 9 stretch, this problem has been fixed in version
3.1.4+debian-2+deb9u2.

We recommend that you upgrade your xerces-c packages.

For the detailed security status of xerces-c please refer to its
security tracker page at:
https://security-tracker.debian.org/tracker/xerces-c

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/2020/12/msg00025.html");
  script_set_attribute(attribute:"see_also", value:"https://packages.debian.org/source/stretch/xerces-c");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/source-package/xerces-c");
  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:H/PR:N/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-2018-1311");

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

  script_set_attribute(attribute:"vuln_publication_date", value:"2019/12/18");
  script_set_attribute(attribute:"patch_publication_date", value:"2020/12/17");
  script_set_attribute(attribute:"plugin_publication_date", value:"2020/12/18");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libxerces-c-dev");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libxerces-c-doc");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libxerces-c-samples");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libxerces-c3.1");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:9.0");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

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

  script_copyright(english:"This script is Copyright (C) 2020-2024 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:"9.0", prefix:"libxerces-c-dev", reference:"3.1.4+debian-2+deb9u2")) flag++;
if (deb_check(release:"9.0", prefix:"libxerces-c-doc", reference:"3.1.4+debian-2+deb9u2")) flag++;
if (deb_check(release:"9.0", prefix:"libxerces-c-samples", reference:"3.1.4+debian-2+deb9u2")) flag++;
if (deb_check(release:"9.0", prefix:"libxerces-c3.1", reference:"3.1.4+debian-2+deb9u2")) 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");