Debian DLA-2991-1 : twisted - LTS security update

#
# (C) Tenable, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Debian Security Advisory dla-2991. The text
# itself is copyright (C) Software in the Public Interest, Inc.
#

include('compat.inc');

if (description)
{
  script_id(160979);
  script_version("1.2");
  script_set_attribute(attribute:"plugin_modification_date", value:"2022/05/11");

  script_cve_id("CVE-2022-24801");

  script_name(english:"Debian DLA-2991-1 : twisted - 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-2991
advisory.

  - Twisted is an event-based framework for internet applications, supporting Python 3.6+. Prior to version
    22.4.0rc1, the Twisted Web HTTP 1.1 server, located in the `twisted.web.http` module, parsed several HTTP
    request constructs more leniently than permitted by RFC 7230. This non-conformant parsing can lead to
    desync if requests pass through multiple HTTP parsers, potentially resulting in HTTP request smuggling.
    Users who may be affected use Twisted Web's HTTP 1.1 server and/or proxy and also pass requests through a
    different HTTP server and/or proxy. The Twisted Web client is not affected. The HTTP 2.0 server uses a
    different parser, so it is not affected. The issue has been addressed in Twisted 22.4.0rc1. Two
    workarounds are available: Ensure any vulnerabilities in upstream proxies have been addressed, such as by
    upgrading them; or filter malformed requests by other means, such as configuration of an upstream proxy.
    (CVE-2022-24801)

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://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1009030");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/source-package/twisted");
  script_set_attribute(attribute:"see_also", value:"https://www.debian.org/lts/security/2022/dla-2991");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2022-24801");
  script_set_attribute(attribute:"see_also", value:"https://packages.debian.org/source/stretch/twisted");
  script_set_attribute(attribute:"solution", value:
"Upgrade the twisted packages.

For Debian 9 stretch, this problem has been fixed in version 16.6.0-2+deb9u3.");
  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-2022-24801");

  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:"2022/04/04");
  script_set_attribute(attribute:"patch_publication_date", value:"2022/05/10");
  script_set_attribute(attribute:"plugin_publication_date", value:"2022/05/11");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:python-twisted");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:python-twisted-bin");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:python-twisted-bin-dbg");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:python-twisted-conch");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:python-twisted-core");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:python-twisted-mail");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:python-twisted-names");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:python-twisted-news");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:python-twisted-runner");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:python-twisted-runner-dbg");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:python-twisted-web");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:python-twisted-words");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:python3-twisted");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:python3-twisted-bin");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:python3-twisted-bin-dbg");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:twisted-doc");
  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': 'python-twisted', 'reference': '16.6.0-2+deb9u3'},
    {'release': '9.0', 'prefix': 'python-twisted-bin', 'reference': '16.6.0-2+deb9u3'},
    {'release': '9.0', 'prefix': 'python-twisted-bin-dbg', 'reference': '16.6.0-2+deb9u3'},
    {'release': '9.0', 'prefix': 'python-twisted-conch', 'reference': '16.6.0-2+deb9u3'},
    {'release': '9.0', 'prefix': 'python-twisted-core', 'reference': '16.6.0-2+deb9u3'},
    {'release': '9.0', 'prefix': 'python-twisted-mail', 'reference': '16.6.0-2+deb9u3'},
    {'release': '9.0', 'prefix': 'python-twisted-names', 'reference': '16.6.0-2+deb9u3'},
    {'release': '9.0', 'prefix': 'python-twisted-news', 'reference': '16.6.0-2+deb9u3'},
    {'release': '9.0', 'prefix': 'python-twisted-runner', 'reference': '16.6.0-2+deb9u3'},
    {'release': '9.0', 'prefix': 'python-twisted-runner-dbg', 'reference': '16.6.0-2+deb9u3'},
    {'release': '9.0', 'prefix': 'python-twisted-web', 'reference': '16.6.0-2+deb9u3'},
    {'release': '9.0', 'prefix': 'python-twisted-words', 'reference': '16.6.0-2+deb9u3'},
    {'release': '9.0', 'prefix': 'python3-twisted', 'reference': '16.6.0-2+deb9u3'},
    {'release': '9.0', 'prefix': 'python3-twisted-bin', 'reference': '16.6.0-2+deb9u3'},
    {'release': '9.0', 'prefix': 'python3-twisted-bin-dbg', 'reference': '16.6.0-2+deb9u3'},
    {'release': '9.0', 'prefix': 'twisted-doc', 'reference': '16.6.0-2+deb9u3'}
];

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, 'python-twisted / python-twisted-bin / python-twisted-bin-dbg / etc');
}