Ubuntu 18.04 LTS / 20.04 LTS / 22.04 LTS : Git vulnerabilities (USN-5511-1)

##
# (C) Tenable, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Ubuntu Security Notice USN-5511-1. The text
# itself is copyright (C) Canonical, Inc. See
# <https://ubuntu.com/security/notices>. Ubuntu(R) is a registered
# trademark of Canonical, Inc.
##

include('compat.inc');

if (description)
{
  script_id(163112);
  script_version("1.7");
  script_set_attribute(attribute:"plugin_modification_date", value:"2023/10/16");

  script_cve_id("CVE-2022-29187");
  script_xref(name:"USN", value:"5511-1");

  script_name(english:"Ubuntu 18.04 LTS / 20.04 LTS / 22.04 LTS : Git vulnerabilities (USN-5511-1)");

  script_set_attribute(attribute:"synopsis", value:
"The remote Ubuntu host is missing a security update.");
  script_set_attribute(attribute:"description", value:
"The remote Ubuntu 18.04 LTS / 20.04 LTS / 21.10 / 22.04 LTS host has packages installed that are affected by a
vulnerability as referenced in the USN-5511-1 advisory.

  - Git is a distributed revision control system. Git prior to versions 2.37.1, 2.36.2, 2.35.4, 2.34.4,
    2.33.4, 2.32.3, 2.31.4, and 2.30.5, is vulnerable to privilege escalation in all platforms. An
    unsuspecting user could still be affected by the issue reported in CVE-2022-24765, for example when
    navigating as root into a shared tmp directory that is owned by them, but where an attacker could create a
    git repository. Versions 2.37.1, 2.36.2, 2.35.4, 2.34.4, 2.33.4, 2.32.3, 2.31.4, and 2.30.5 contain a
    patch for this issue. The simplest way to avoid being affected by the exploit described in the example is
    to avoid running git as root (or an Administrator in Windows), and if needed to reduce its use to a
    minimum. While a generic workaround is not possible, a system could be hardened from the exploit described
    in the example by removing any such repository if it exists already and creating one as root to block any
    future attacks. (CVE-2022-29187)

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://ubuntu.com/security/notices/USN-5511-1");
  script_set_attribute(attribute:"solution", value:
"Update the affected packages.");
  script_set_cvss_base_vector("CVSS2#AV:L/AC:M/Au:N/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:L/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-2022-29187");

  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:"2022/07/12");
  script_set_attribute(attribute:"patch_publication_date", value:"2022/07/13");
  script_set_attribute(attribute:"plugin_publication_date", value:"2022/07/14");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:18.04:-:lts");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:20.04:-:lts");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:22.04:-:lts");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:git");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:git-all");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:git-cvs");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:git-daemon-run");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:git-daemon-sysvinit");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:git-el");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:git-email");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:git-gui");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:git-man");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:git-mediawiki");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:git-svn");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:gitk");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:gitweb");
  script_end_attributes();

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

  script_copyright(english:"Ubuntu Security Notice (C) 2022-2023 Canonical, Inc. / NASL script (C) 2022-2023 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("ssh_get_info.nasl");
  script_require_keys("Host/cpu", "Host/Ubuntu", "Host/Ubuntu/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);
var os_release = get_kb_item('Host/Ubuntu/release');
if ( isnull(os_release) ) audit(AUDIT_OS_NOT, 'Ubuntu');
os_release = chomp(os_release);
if (! ('18.04' >< os_release || '20.04' >< os_release || '22.04' >< os_release)) audit(AUDIT_OS_NOT, 'Ubuntu 18.04 / 20.04 / 22.04', 'Ubuntu ' + os_release);
if ( ! get_kb_item('Host/Debian/dpkg-l') ) audit(AUDIT_PACKAGE_LIST_MISSING);

var cpu = get_kb_item('Host/cpu');
if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
if ('x86_64' >!< cpu && cpu !~ "^i[3-6]86$" && 's390' >!< cpu && 'aarch64' >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, 'Ubuntu', cpu);

var pkgs = [
    {'osver': '18.04', 'pkgname': 'git', 'pkgver': '1:2.17.1-1ubuntu0.12'},
    {'osver': '18.04', 'pkgname': 'git-all', 'pkgver': '1:2.17.1-1ubuntu0.12'},
    {'osver': '18.04', 'pkgname': 'git-cvs', 'pkgver': '1:2.17.1-1ubuntu0.12'},
    {'osver': '18.04', 'pkgname': 'git-daemon-run', 'pkgver': '1:2.17.1-1ubuntu0.12'},
    {'osver': '18.04', 'pkgname': 'git-daemon-sysvinit', 'pkgver': '1:2.17.1-1ubuntu0.12'},
    {'osver': '18.04', 'pkgname': 'git-el', 'pkgver': '1:2.17.1-1ubuntu0.12'},
    {'osver': '18.04', 'pkgname': 'git-email', 'pkgver': '1:2.17.1-1ubuntu0.12'},
    {'osver': '18.04', 'pkgname': 'git-gui', 'pkgver': '1:2.17.1-1ubuntu0.12'},
    {'osver': '18.04', 'pkgname': 'git-man', 'pkgver': '1:2.17.1-1ubuntu0.12'},
    {'osver': '18.04', 'pkgname': 'git-mediawiki', 'pkgver': '1:2.17.1-1ubuntu0.12'},
    {'osver': '18.04', 'pkgname': 'git-svn', 'pkgver': '1:2.17.1-1ubuntu0.12'},
    {'osver': '18.04', 'pkgname': 'gitk', 'pkgver': '1:2.17.1-1ubuntu0.12'},
    {'osver': '18.04', 'pkgname': 'gitweb', 'pkgver': '1:2.17.1-1ubuntu0.12'},
    {'osver': '20.04', 'pkgname': 'git', 'pkgver': '1:2.25.1-1ubuntu3.5'},
    {'osver': '20.04', 'pkgname': 'git-all', 'pkgver': '1:2.25.1-1ubuntu3.5'},
    {'osver': '20.04', 'pkgname': 'git-cvs', 'pkgver': '1:2.25.1-1ubuntu3.5'},
    {'osver': '20.04', 'pkgname': 'git-daemon-run', 'pkgver': '1:2.25.1-1ubuntu3.5'},
    {'osver': '20.04', 'pkgname': 'git-daemon-sysvinit', 'pkgver': '1:2.25.1-1ubuntu3.5'},
    {'osver': '20.04', 'pkgname': 'git-el', 'pkgver': '1:2.25.1-1ubuntu3.5'},
    {'osver': '20.04', 'pkgname': 'git-email', 'pkgver': '1:2.25.1-1ubuntu3.5'},
    {'osver': '20.04', 'pkgname': 'git-gui', 'pkgver': '1:2.25.1-1ubuntu3.5'},
    {'osver': '20.04', 'pkgname': 'git-man', 'pkgver': '1:2.25.1-1ubuntu3.5'},
    {'osver': '20.04', 'pkgname': 'git-mediawiki', 'pkgver': '1:2.25.1-1ubuntu3.5'},
    {'osver': '20.04', 'pkgname': 'git-svn', 'pkgver': '1:2.25.1-1ubuntu3.5'},
    {'osver': '20.04', 'pkgname': 'gitk', 'pkgver': '1:2.25.1-1ubuntu3.5'},
    {'osver': '20.04', 'pkgname': 'gitweb', 'pkgver': '1:2.25.1-1ubuntu3.5'},
    {'osver': '22.04', 'pkgname': 'git', 'pkgver': '1:2.34.1-1ubuntu1.4'},
    {'osver': '22.04', 'pkgname': 'git-all', 'pkgver': '1:2.34.1-1ubuntu1.4'},
    {'osver': '22.04', 'pkgname': 'git-cvs', 'pkgver': '1:2.34.1-1ubuntu1.4'},
    {'osver': '22.04', 'pkgname': 'git-daemon-run', 'pkgver': '1:2.34.1-1ubuntu1.4'},
    {'osver': '22.04', 'pkgname': 'git-daemon-sysvinit', 'pkgver': '1:2.34.1-1ubuntu1.4'},
    {'osver': '22.04', 'pkgname': 'git-email', 'pkgver': '1:2.34.1-1ubuntu1.4'},
    {'osver': '22.04', 'pkgname': 'git-gui', 'pkgver': '1:2.34.1-1ubuntu1.4'},
    {'osver': '22.04', 'pkgname': 'git-man', 'pkgver': '1:2.34.1-1ubuntu1.4'},
    {'osver': '22.04', 'pkgname': 'git-mediawiki', 'pkgver': '1:2.34.1-1ubuntu1.4'},
    {'osver': '22.04', 'pkgname': 'git-svn', 'pkgver': '1:2.34.1-1ubuntu1.4'},
    {'osver': '22.04', 'pkgname': 'gitk', 'pkgver': '1:2.34.1-1ubuntu1.4'},
    {'osver': '22.04', 'pkgname': 'gitweb', 'pkgver': '1:2.34.1-1ubuntu1.4'}
];

var flag = 0;
foreach package_array ( pkgs ) {
  var osver = NULL;
  var pkgname = NULL;
  var pkgver = NULL;
  if (!empty_or_null(package_array['osver'])) osver = package_array['osver'];
  if (!empty_or_null(package_array['pkgname'])) pkgname = package_array['pkgname'];
  if (!empty_or_null(package_array['pkgver'])) pkgver = package_array['pkgver'];
  if (osver && pkgname && pkgver) {
    if (ubuntu_check(osver:osver, pkgname:pkgname, pkgver:pkgver)) flag++;
  }
}

if (flag)
{
  security_report_v4(
    port       : 0,
    severity   : SECURITY_WARNING,
    extra      : ubuntu_report_get()
  );
  exit(0);
}
else
{
  var tested = ubuntu_pkg_tests_get();
  if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
  else audit(AUDIT_PACKAGE_NOT_INSTALLED, 'git / git-all / git-cvs / git-daemon-run / git-daemon-sysvinit / etc');
}