Ubuntu 16.04 LTS / 18.04 LTS : Git vulnerabilities (USN-7023-1)

#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Ubuntu Security Notice USN-7023-1. 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(207439);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2024/09/19");

  script_cve_id(
    "CVE-2023-25815",
    "CVE-2024-32002",
    "CVE-2024-32004",
    "CVE-2024-32020",
    "CVE-2024-32021",
    "CVE-2024-32465"
  );
  script_xref(name:"USN", value:"7023-1");

  script_name(english:"Ubuntu 16.04 LTS / 18.04 LTS : Git vulnerabilities (USN-7023-1)");

  script_set_attribute(attribute:"synopsis", value:
"The remote Ubuntu host is missing one or more security updates.");
  script_set_attribute(attribute:"description", value:
"The remote Ubuntu 16.04 LTS / 18.04 LTS host has packages installed that are affected by multiple vulnerabilities as
referenced in the USN-7023-1 advisory.

    Maxime Escourbiac and Yassine Bengana discovered that Git incorrectly handled some gettext machinery. An
    attacker could possibly use this issue to allows the malicious placement of crafted messages. This issue
    was fixed in Ubuntu 16.04 LTS. (CVE-2023-25815)

    It was discovered that Git incorrectly handled certain submodules. An attacker could possibly use this
    issue to execute arbitrary code. This issue was fixed in Ubuntu 18.04 LTS. (CVE-2024-32002)

    It was discovered that Git incorrectly handled certain cloned repositories. An attacker could possibly use
    this issue to execute arbitrary code. This issue was fixed in Ubuntu 18.04 LTS. (CVE-2024-32004,
    CVE-2024-32465)

    It was discovered that Git incorrectly handled local clones with hardlinked files/directories. An attacker
    could possibly use this issue to place a specialized repository on their targets local system. This
    issue was fixed in Ubuntu 18.04 LTS. (CVE-2024-32020)

    It was discovered that Git incorrectly handled certain symlinks. An attacker could possibly use this issue
    to impact availability and integrity creating hardlinked arbitrary files into users repositorys
    objects/directory. This issue was fixed in Ubuntu 18.04 LTS. (CVE-2024-32021)

Tenable has extracted the preceding description block directly from the Ubuntu security advisory.

Note that Nessus has not tested for these issues 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-7023-1");
  script_set_attribute(attribute:"solution", value:
"Update the affected packages.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:H/Au:N/C:C/I:C/A:C");
  script_set_cvss_temporal_vector("CVSS2#E:POC/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:P/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2024-32002");

  script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"true");

  script_set_attribute(attribute:"vuln_publication_date", value:"2023/04/25");
  script_set_attribute(attribute:"patch_publication_date", value:"2024/09/19");
  script_set_attribute(attribute:"plugin_publication_date", value:"2024/09/19");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:16.04:-:lts");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:18.04:-: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-arch");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:git-core");
  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_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

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

  script_copyright(english:"Ubuntu Security Notice (C) 2024 Canonical, Inc. / NASL script (C) 2024 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("ssh_get_info.nasl", "ubuntu_pro_sub_detect.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 (! ('16.04' >< os_release || '18.04' >< os_release)) audit(AUDIT_OS_NOT, 'Ubuntu 16.04 / 18.04', '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 ubuntu_pro_detected = get_kb_item('Host/Ubuntu/Pro/Services/esm-apps');
ubuntu_pro_detected = !empty_or_null(ubuntu_pro_detected);

var pro_caveat_needed = FALSE;

var pkgs = [
    {'osver': '16.04', 'pkgname': 'git', 'pkgver': '1:2.7.4-0ubuntu1.10+esm8', 'ubuntu_pro': TRUE},
    {'osver': '16.04', 'pkgname': 'git-all', 'pkgver': '1:2.7.4-0ubuntu1.10+esm8', 'ubuntu_pro': TRUE},
    {'osver': '16.04', 'pkgname': 'git-arch', 'pkgver': '1:2.7.4-0ubuntu1.10+esm8', 'ubuntu_pro': TRUE},
    {'osver': '16.04', 'pkgname': 'git-core', 'pkgver': '1:2.7.4-0ubuntu1.10+esm8', 'ubuntu_pro': TRUE},
    {'osver': '16.04', 'pkgname': 'git-cvs', 'pkgver': '1:2.7.4-0ubuntu1.10+esm8', 'ubuntu_pro': TRUE},
    {'osver': '16.04', 'pkgname': 'git-daemon-run', 'pkgver': '1:2.7.4-0ubuntu1.10+esm8', 'ubuntu_pro': TRUE},
    {'osver': '16.04', 'pkgname': 'git-daemon-sysvinit', 'pkgver': '1:2.7.4-0ubuntu1.10+esm8', 'ubuntu_pro': TRUE},
    {'osver': '16.04', 'pkgname': 'git-el', 'pkgver': '1:2.7.4-0ubuntu1.10+esm8', 'ubuntu_pro': TRUE},
    {'osver': '16.04', 'pkgname': 'git-email', 'pkgver': '1:2.7.4-0ubuntu1.10+esm8', 'ubuntu_pro': TRUE},
    {'osver': '16.04', 'pkgname': 'git-gui', 'pkgver': '1:2.7.4-0ubuntu1.10+esm8', 'ubuntu_pro': TRUE},
    {'osver': '16.04', 'pkgname': 'git-man', 'pkgver': '1:2.7.4-0ubuntu1.10+esm8', 'ubuntu_pro': TRUE},
    {'osver': '16.04', 'pkgname': 'git-mediawiki', 'pkgver': '1:2.7.4-0ubuntu1.10+esm8', 'ubuntu_pro': TRUE},
    {'osver': '16.04', 'pkgname': 'git-svn', 'pkgver': '1:2.7.4-0ubuntu1.10+esm8', 'ubuntu_pro': TRUE},
    {'osver': '16.04', 'pkgname': 'gitk', 'pkgver': '1:2.7.4-0ubuntu1.10+esm8', 'ubuntu_pro': TRUE},
    {'osver': '16.04', 'pkgname': 'gitweb', 'pkgver': '1:2.7.4-0ubuntu1.10+esm8', 'ubuntu_pro': TRUE},
    {'osver': '18.04', 'pkgname': 'git', 'pkgver': '1:2.17.1-1ubuntu0.18+esm1', 'ubuntu_pro': TRUE},
    {'osver': '18.04', 'pkgname': 'git-all', 'pkgver': '1:2.17.1-1ubuntu0.18+esm1', 'ubuntu_pro': TRUE},
    {'osver': '18.04', 'pkgname': 'git-cvs', 'pkgver': '1:2.17.1-1ubuntu0.18+esm1', 'ubuntu_pro': TRUE},
    {'osver': '18.04', 'pkgname': 'git-daemon-run', 'pkgver': '1:2.17.1-1ubuntu0.18+esm1', 'ubuntu_pro': TRUE},
    {'osver': '18.04', 'pkgname': 'git-daemon-sysvinit', 'pkgver': '1:2.17.1-1ubuntu0.18+esm1', 'ubuntu_pro': TRUE},
    {'osver': '18.04', 'pkgname': 'git-el', 'pkgver': '1:2.17.1-1ubuntu0.18+esm1', 'ubuntu_pro': TRUE},
    {'osver': '18.04', 'pkgname': 'git-email', 'pkgver': '1:2.17.1-1ubuntu0.18+esm1', 'ubuntu_pro': TRUE},
    {'osver': '18.04', 'pkgname': 'git-gui', 'pkgver': '1:2.17.1-1ubuntu0.18+esm1', 'ubuntu_pro': TRUE},
    {'osver': '18.04', 'pkgname': 'git-man', 'pkgver': '1:2.17.1-1ubuntu0.18+esm1', 'ubuntu_pro': TRUE},
    {'osver': '18.04', 'pkgname': 'git-mediawiki', 'pkgver': '1:2.17.1-1ubuntu0.18+esm1', 'ubuntu_pro': TRUE},
    {'osver': '18.04', 'pkgname': 'git-svn', 'pkgver': '1:2.17.1-1ubuntu0.18+esm1', 'ubuntu_pro': TRUE},
    {'osver': '18.04', 'pkgname': 'gitk', 'pkgver': '1:2.17.1-1ubuntu0.18+esm1', 'ubuntu_pro': TRUE},
    {'osver': '18.04', 'pkgname': 'gitweb', 'pkgver': '1:2.17.1-1ubuntu0.18+esm1', 'ubuntu_pro': TRUE}
];

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

if (flag)
{
  var extra = '';
  if (pro_caveat_needed) {
    extra += 'NOTE: This vulnerability check contains fixes that apply to packages only \n';
    extra += 'available in Ubuntu ESM repositories. Access to these package security updates \n';
    extra += 'require an Ubuntu Pro subscription.\n\n';
  }
  extra += ubuntu_report_get();
  security_report_v4(
    port       : 0,
    severity   : SECURITY_HOLE,
    extra      : extra
  );
  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-arch / git-core / git-cvs / git-daemon-run / etc');
}