Debian DLA-3043-1 : pidgin - LTS security update

#
# (C) Tenable, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Debian Security Advisory dla-3043. The text
# itself is copyright (C) Software in the Public Interest, Inc.
#

include('compat.inc');

if (description)
{
  script_id(161907);
  script_version("1.3");
  script_set_attribute(attribute:"plugin_modification_date", value:"2022/06/10");

  script_cve_id("CVE-2022-26491");

  script_name(english:"Debian DLA-3043-1 : pidgin - LTS security update");

  script_set_attribute(attribute:"synopsis", value:
"The remote Debian host is missing a security-related update.");
  script_set_attribute(attribute:"description", value:
"The remote Debian 9 host has packages installed that are affected by a vulnerability as referenced in the dla-3043
advisory.

  - An issue was discovered in Pidgin before 2.14.9. A remote attacker who can spoof DNS responses can
    redirect a client connection to a malicious server. The client will perform TLS certificate verification
    of the malicious domain name instead of the original XMPP service domain, allowing the attacker to take
    over control over the XMPP connection and to obtain user credentials and all communication content. This
    is similar to CVE-2022-24968. (CVE-2022-26491)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version
number.");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/source-package/pidgin");
  script_set_attribute(attribute:"see_also", value:"https://www.debian.org/lts/security/2022/dla-3043");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2022-26491");
  script_set_attribute(attribute:"see_also", value:"https://packages.debian.org/source/stretch/pidgin");
  script_set_attribute(attribute:"solution", value:
"Upgrade the pidgin packages.

For Debian 9 stretch, this problem has been fixed in version 2.12.0-1+deb9u1.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:N/C:P/I:N/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:H/PR:N/UI:N/S:U/C:H/I:N/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-2022-26491");

  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:"2022/06/02");
  script_set_attribute(attribute:"patch_publication_date", value:"2022/06/06");
  script_set_attribute(attribute:"plugin_publication_date", value:"2022/06/06");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:finch");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:finch-dev");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libpurple-bin");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libpurple-dev");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libpurple0");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:pidgin");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:pidgin-data");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:pidgin-dbg");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:pidgin-dev");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:9.0");
  script_end_attributes();

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

  script_copyright(english:"This script is Copyright (C) 2022 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('debian_package.inc');

if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
if (!get_kb_item("Host/Debian/dpkg-l")) audit(AUDIT_PACKAGE_LIST_MISSING);

var release = get_kb_item('Host/Debian/release');
if ( isnull(release) ) audit(AUDIT_OS_NOT, 'Debian');
var release = chomp(release);
if (! preg(pattern:"^(9)\.[0-9]+", string:release)) audit(AUDIT_OS_NOT, 'Debian 9.0', 'Debian ' + release);
var cpu = get_kb_item('Host/cpu');
if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
if ('x86_64' >!< cpu && cpu !~ "^i[3-6]86$" && 'aarch64' >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, 'Debian', cpu);

var pkgs = [
    {'release': '9.0', 'prefix': 'finch', 'reference': '2.12.0-1+deb9u1'},
    {'release': '9.0', 'prefix': 'finch-dev', 'reference': '2.12.0-1+deb9u1'},
    {'release': '9.0', 'prefix': 'libpurple-bin', 'reference': '2.12.0-1+deb9u1'},
    {'release': '9.0', 'prefix': 'libpurple-dev', 'reference': '2.12.0-1+deb9u1'},
    {'release': '9.0', 'prefix': 'libpurple0', 'reference': '2.12.0-1+deb9u1'},
    {'release': '9.0', 'prefix': 'pidgin', 'reference': '2.12.0-1+deb9u1'},
    {'release': '9.0', 'prefix': 'pidgin-data', 'reference': '2.12.0-1+deb9u1'},
    {'release': '9.0', 'prefix': 'pidgin-dbg', 'reference': '2.12.0-1+deb9u1'},
    {'release': '9.0', 'prefix': 'pidgin-dev', 'reference': '2.12.0-1+deb9u1'}
];

var flag = 0;
foreach package_array ( pkgs ) {
  var release = NULL;
  var prefix = NULL;
  var reference = NULL;
  if (!empty_or_null(package_array['release'])) release = package_array['release'];
  if (!empty_or_null(package_array['prefix'])) prefix = package_array['prefix'];
  if (!empty_or_null(package_array['reference'])) reference = package_array['reference'];
  if (release && prefix && reference) {
    if (deb_check(release:release, prefix:prefix, reference:reference)) flag++;
  }
}

if (flag)
{
  security_report_v4(
    port       : 0,
    severity   : SECURITY_WARNING,
    extra      : deb_report_get()
  );
  exit(0);
}
else
{
  var tested = deb_pkg_tests_get();
  if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
  else audit(AUDIT_PACKAGE_NOT_INSTALLED, 'finch / finch-dev / libpurple-bin / libpurple-dev / libpurple0 / etc');
}