Debian DLA-2316-1 : ruby-kramdown security update

#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Debian Security Advisory DLA-2316-1. The text
# itself is copyright (C) Software in the Public Interest, Inc.
#

include('compat.inc');

if (description)
{
  script_id(139427);
  script_version("1.3");
  script_set_attribute(attribute:"plugin_modification_date", value:"2024/02/26");

  script_cve_id("CVE-2020-14001");

  script_name(english:"Debian DLA-2316-1 : ruby-kramdown security update");

  script_set_attribute(attribute:"synopsis", value:
"The remote Debian host is missing a security update.");
  script_set_attribute(attribute:"description", value:
"ruby-kramdown processes the template option inside Kramdown documents
by default, which allows unintended read access (such as
template='/etc/passwd') or unintended embedded Ruby code execution
(such as a string that begins with template='string://<%= `). NOTE:
kramdown is used in Jekyll, GitLab Pages, GitHub Pages, and Thredded
Forum.

For Debian 9 stretch, this problem has been fixed in version
1.12.0-1+deb9u1.

We recommend that you upgrade your ruby-kramdown packages.

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

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/2020/08/msg00014.html");
  script_set_attribute(attribute:"see_also", value:"https://packages.debian.org/source/stretch/ruby-kramdown");
  # https://security-tracker.debian.org/tracker/source-package/ruby-kramdown
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?e23501f8");
  script_set_attribute(attribute:"solution", value:
"Upgrade the affected ruby-kramdown package.");
  script_set_cvss_base_vector("CVSS2#AV:N/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:N/AC:L/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-2020-14001");

  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:"2020/07/17");
  script_set_attribute(attribute:"patch_publication_date", value:"2020/08/08");
  script_set_attribute(attribute:"plugin_publication_date", value:"2020/08/10");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:ruby-kramdown");
  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:"ruby-kramdown", reference:"1.12.0-1+deb9u1")) flag++;

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