GLSA-202209-01 : GNU Gzip, XZ Utils: Arbitrary file write

#%NASL_MIN_LEVEL 80900
#
# (C) Tenable, Inc.
#
# @NOAGENT@
#
# The descriptive text and package checks in this plugin were
# extracted from Gentoo Linux Security Advisory GLSA 202209-01.
#
# The advisory text is Copyright (C) 2001-2021 Gentoo Foundation, Inc.
# and licensed under the Creative Commons - Attribution / Share Alike
# license. See http://creativecommons.org/licenses/by-sa/3.0/
#

include('compat.inc');

if (description)
{
  script_id(164802);
  script_version("1.3");
  script_set_attribute(attribute:"plugin_modification_date", value:"2023/10/12");

  script_cve_id("CVE-2022-1271");

  script_name(english:"GLSA-202209-01 : GNU Gzip, XZ Utils: Arbitrary file write");

  script_set_attribute(attribute:"synopsis", value:
"");
  script_set_attribute(attribute:"description", value:
"The remote host is affected by the vulnerability described in GLSA-202209-01 (GNU Gzip, XZ Utils: Arbitrary file write)

  - An arbitrary file write vulnerability was found in GNU gzip's zgrep utility. When zgrep is applied on the
    attacker's chosen file name (for example, a crafted file name), this can overwrite an attacker's content
    to an arbitrary attacker-selected file. This flaw occurs due to insufficient validation when processing
    filenames with two or more newlines where selected content and the target file names are embedded in
    crafted multi-line file names. This flaw allows a remote, low privileged attacker to force zgrep to write
    arbitrary files on the system. (CVE-2022-1271)

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.gentoo.org/glsa/202209-01");
  script_set_attribute(attribute:"see_also", value:"https://bugs.gentoo.org/show_bug.cgi?id=837152");
  script_set_attribute(attribute:"see_also", value:"https://bugs.gentoo.org/show_bug.cgi?id=837155");
  script_set_attribute(attribute:"solution", value:
"All GNU Gzip users should upgrade to the latest version:

          # emerge --sync
          # emerge --ask --oneshot --verbose >=app-arch/gzip-1.12
        
All XZ Utils users should upgrade to the latest version:

          # emerge --sync
          # emerge --ask --oneshot --verbose >=app-arch/xz-utils-5.2.5");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:S/C:C/I:C/A:C");
  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:L/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-2022-1271");

  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:"2022/04/19");
  script_set_attribute(attribute:"patch_publication_date", value:"2022/09/07");
  script_set_attribute(attribute:"plugin_publication_date", value:"2022/09/07");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:gentoo:linux:gzip");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:gentoo:linux:xz-utils");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:gentoo:linux");
  script_end_attributes();

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

  script_copyright(english:"This script is Copyright (C) 2022-2023 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("ssh_get_info.nasl");
  script_require_keys("Host/local_checks_enabled", "Host/Gentoo/release", "Host/Gentoo/qpkg-list");

  exit(0);
}
include("qpkg.inc");

if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
if (!get_kb_item("Host/Gentoo/release")) audit(AUDIT_OS_NOT, "Gentoo");
if (!get_kb_item("Host/Gentoo/qpkg-list")) audit(AUDIT_PACKAGE_LIST_MISSING);

var flag = 0;

var packages = [
  {
    'name' : "app-arch/gzip",
    'unaffected' : make_list("ge 1.12", "lt 1.0.0"),
    'vulnerable' : make_list("lt 1.12")
  },
  {
    'name' : "app-arch/xz-utils",
    'unaffected' : make_list("ge 5.2.5", "lt 5.0.0"),
    'vulnerable' : make_list("lt 5.2.5")
  }
];

foreach package( packages ) {
  if (isnull(package['unaffected'])) package['unaffected'] = make_list();
  if (isnull(package['vulnerable'])) package['vulnerable'] = make_list();
  if (qpkg_check(package: package['name'] , unaffected: package['unaffected'], vulnerable: package['vulnerable'])) flag++;
}

# This plugin has a different number of unaffected and vulnerable versions for
# one or more packages. To ensure proper detection, a separate line should be 
# used for each fixed/vulnerable version pair.

if (flag)
{
  security_report_v4(
    port       : 0,
    severity   : SECURITY_HOLE,
    extra      : qpkg_report_get()
  );
  exit(0);
}
else
{
  qpkg_tests = list_uniq(qpkg_tests);
  var tested = qpkg_tests_get();
  if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
  else audit(AUDIT_PACKAGE_NOT_INSTALLED, "GNU Gzip / XZ Utils");
}