Debian DLA-2390-1 : ruby-json-jwt security update

#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Debian Security Advisory DLA-2390-1. The text
# itself is copyright (C) Software in the Public Interest, Inc.
#

include('compat.inc');

if (description)
{
  script_id(141132);
  script_version("1.3");
  script_set_attribute(attribute:"plugin_modification_date", value:"2024/02/16");

  script_cve_id("CVE-2019-18848");

  script_name(english:"Debian DLA-2390-1 : ruby-json-jwt security update");

  script_set_attribute(attribute:"synopsis", value:
"The remote Debian host is missing a security update.");
  script_set_attribute(attribute:"description", value:
"The json-jwt gem before 1.11.0 for Ruby lacks an element count during
the splitting of a JWE string.

Therefore, there was a need to explicitly specify the number of
elements when splitting a JWE string.

For Debian 9 stretch, this problem has been fixed in version
1.6.2-1+deb9u2.

We recommend that you upgrade your ruby-json-jwt packages.

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

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/2020/10/msg00001.html");
  script_set_attribute(attribute:"see_also", value:"https://packages.debian.org/source/stretch/ruby-json-jwt");
  # https://security-tracker.debian.org/tracker/source-package/ruby-json-jwt
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?0f0dbb2d");
  script_set_attribute(attribute:"solution", value:
"Upgrade the affected ruby-json-jwt package.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:N/I:P/A:N");
  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:N/I:H/A:N");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2019-18848");

  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:"2019/11/12");
  script_set_attribute(attribute:"patch_publication_date", value:"2020/10/01");
  script_set_attribute(attribute:"plugin_publication_date", value:"2020/10/05");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:ruby-json-jwt");
  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-json-jwt", reference:"1.6.2-1+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");