CentOS Linux 7 [TuxCare] Security Update: emacs-git / emacs-git-el / git / git-all / git-bzr / git-cvs / etc Multiple Vulnerabilities (CENTOS7:CLSA-2024:1712672592)

#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
##

include('compat.inc');

if (description)
{
  script_id(353137);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/09/30");

  script_cve_id("CVE-2021-40330", "CVE-2022-39260");
  script_xref(name:"CLSA", value:"2024:1712672592");

  script_name(english:"CentOS Linux 7 [TuxCare] Security Update: emacs-git / emacs-git-el / git / git-all / git-bzr / git-cvs / etc Multiple Vulnerabilities (CENTOS7:CLSA-2024:1712672592)");

  script_set_attribute(attribute:"synopsis", value:
"The CentOS Linux host is missing one or more security updates.");
  script_set_attribute(attribute:"description", value:
"The CentOS Linux 7 host has packages installed that are affected by multiple vulnerabilities as referenced in the
TuxCare CENTOS7:CLSA-2024:1712672592 advisory.

  - git_connect_git in connect.c in Git before 2.30.1 allows a repository path to contain a newline character,
    which may result in unexpected cross-protocol requests, as demonstrated by the
    git://localhost:1234/%0d%0a%0d%0aGET%20/%20HTTP/1.1 substring. (CVE-2021-40330)

  - Git is an open source, scalable, distributed revision control system. `git shell` is a restricted login
    shell that can be used to implement Git's push/pull functionality via SSH. In versions prior to 2.30.6,
    2.31.5, 2.32.4, 2.33.5, 2.34.5, 2.35.5, 2.36.3, and 2.37.4, the function that splits the command arguments
    into an array improperly uses an `int` to represent the number of entries in the array, allowing a
    malicious actor to intentionally overflow the return value, leading to arbitrary heap writes. Because the
    resulting array is then passed to `execv()`, it is possible to leverage this attack to gain remote code
    execution on a victim machine. Note that a victim must first allow access to `git shell` as a login shell
    in order to be vulnerable to this attack. This problem is patched in versions 2.30.6, 2.31.5, 2.32.4,
    2.33.5, 2.34.5, 2.35.5, 2.36.3, and 2.37.4 and users are advised to upgrade to the latest version.
    Disabling `git shell` access via remote logins is a viable short-term workaround. (CVE-2022-39260)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version
number.");
  # https://security.tuxcare.com/csaf/v2/els_os/centos7els/advisories/2024/clsa-2024_1712672592.json
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?645a433f");
  script_set_attribute(attribute:"see_also", value:"https://cve.tuxcare.com/els/releases/CLSA-2024:1712672592");
  script_set_attribute(attribute:"solution", value:
"Update the affected packages based on the guidance in TuxCare advisory CENTOS7:CLSA-2024:1712672592.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:P/I:N/A:N");
  script_set_cvss_temporal_vector("CVSS2#E:POC/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/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-2021-40330");
  script_set_attribute(attribute:"cvss3_score_source", value:"CVE-2022-39260");

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

  script_set_attribute(attribute:"vuln_publication_date", value:"2021/08/31");
  script_set_attribute(attribute:"patch_publication_date", value:"2024/04/09");
  script_set_attribute(attribute:"plugin_publication_date", value:"2026/09/30");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

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

  script_copyright(english:"This script is Copyright (C) 2026 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("ssh_get_info2.nasl");
  script_require_keys("Host/OS/extended-third-party", "Host/local_checks_enabled", "Host/CentOS/release", "Host/CentOS/rpm-list");

  exit(0);
}
include('rpm2.inc');

var third_party_support = get_kb_item('Host/OS/extended-third-party');
if (empty_or_null(third_party_support) || third_party_support != 'TuxCare') exit(0, 'TuxCare support not enabled.');

if (!get_kb_item('Host/local_checks_enabled')) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
var os_product = get_kb_item('installed_os/local/SSH/0/product');
if (isnull(os_product) || 'CentOS Linux' >!< os_product) audit(AUDIT_OS_NOT, 'CentOS Linux');
var os_version = get_kb_item('installed_os/local/SSH/0/version');
if (isnull(os_version)) audit(AUDIT_UNKNOWN_APP_VER, 'CentOS Linux');
if (! preg(pattern:"^7([^0-9]|$)", string:os_version)) audit(AUDIT_OS_NOT, 'CentOS Linux 7', 'CentOS Linux ' + os_version);

if (!get_kb_item('Host/CentOS/rpm-list')) audit(AUDIT_PACKAGE_LIST_MISSING);

var cpu = get_kb_item('Host/cpu');
if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
if ('x86_64' >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, 'CentOS Linux', cpu);


var constraints = [
  {
    'release': '7',
    'pkgs': [
      {'reference':'emacs-git-1.8.3.1-25.el7_9.tuxcare.els1', 'el_string':'el7_9', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'emacs-git-el-1.8.3.1-25.el7_9.tuxcare.els1', 'el_string':'el7_9', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'git-1.8.3.1-25.el7_9.tuxcare.els1', 'cpu':'x86_64', 'el_string':'el7_9', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'git-all-1.8.3.1-25.el7_9.tuxcare.els1', 'el_string':'el7_9', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'git-bzr-1.8.3.1-25.el7_9.tuxcare.els1', 'el_string':'el7_9', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'git-cvs-1.8.3.1-25.el7_9.tuxcare.els1', 'el_string':'el7_9', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'git-daemon-1.8.3.1-25.el7_9.tuxcare.els1', 'cpu':'x86_64', 'el_string':'el7_9', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'git-email-1.8.3.1-25.el7_9.tuxcare.els1', 'el_string':'el7_9', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'git-gnome-keyring-1.8.3.1-25.el7_9.tuxcare.els1', 'cpu':'x86_64', 'el_string':'el7_9', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'git-gui-1.8.3.1-25.el7_9.tuxcare.els1', 'el_string':'el7_9', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'git-hg-1.8.3.1-25.el7_9.tuxcare.els1', 'el_string':'el7_9', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'git-instaweb-1.8.3.1-25.el7_9.tuxcare.els1', 'el_string':'el7_9', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'git-p4-1.8.3.1-25.el7_9.tuxcare.els1', 'el_string':'el7_9', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'git-svn-1.8.3.1-25.el7_9.tuxcare.els1', 'cpu':'x86_64', 'el_string':'el7_9', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'gitk-1.8.3.1-25.el7_9.tuxcare.els1', 'el_string':'el7_9', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'gitweb-1.8.3.1-25.el7_9.tuxcare.els1', 'el_string':'el7_9', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'perl-Git-1.8.3.1-25.el7_9.tuxcare.els1', 'el_string':'el7_9', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'perl-Git-SVN-1.8.3.1-25.el7_9.tuxcare.els1', 'el_string':'el7_9', 'rpm_spec_vers_cmp':TRUE}
    ]
  }
];

var os_release = get_one_kb_item('installed_os/local/SSH/0/release');
var os_sp = get_one_kb_item('Host/*/minor_release');

var flag = 0;
var reference;
var sp;
var _cpu;
var el_string;
var rpm_spec_vers_cmp;
var epoch;
var allowmaj;
var exists_check;
var cves;
foreach var constraint ( constraints ) {
  # Check that the target release is equal to the affected release
  if (!empty_or_null(constraint['release'])){
    if (constraint['release'] != os_release) continue;
  }
  if (!empty_or_null(constraint['sp'])){
    if (constraint['sp'] != os_sp) continue;
  }
  foreach var pkg ( constraint['pkgs'] ) {
    reference = NULL;
    sp = NULL;
    _cpu = NULL;
    el_string = NULL;
    rpm_spec_vers_cmp = NULL;
    epoch = NULL;
    allowmaj = NULL;
    exists_check = NULL;
    cves = NULL;
    if (!empty_or_null(pkg['reference'])) reference = pkg['reference'];
    if (!empty_or_null(pkg['sp'])) sp = pkg['sp'];
    if (!empty_or_null(pkg['cpu'])) _cpu = pkg['cpu'];
    if (!empty_or_null(pkg['el_string'])) el_string = pkg['el_string'];
    if (!empty_or_null(pkg['rpm_spec_vers_cmp'])) rpm_spec_vers_cmp = pkg['rpm_spec_vers_cmp'];
    if (!empty_or_null(pkg['epoch'])) epoch = pkg['epoch'];
    if (!empty_or_null(pkg['allowmaj'])) allowmaj = pkg['allowmaj'];
    if (!empty_or_null(pkg['exists_check'])) exists_check = pkg['exists_check'];
    if (!empty_or_null(pkg['cves'])) cves = pkg['cves'];
    if (reference &&
        ## (no known rpm to check OR known rpm_exists)
        (!exists_check || rpm_exists(rpm:exists_check)) &&
        rpm_check(sp:sp, cpu:_cpu, reference:reference, epoch:epoch, el_string:el_string, rpm_spec_vers_cmp:rpm_spec_vers_cmp, allowmaj:allowmaj, cves:cves)) flag++;
  }
}


if (flag)
{
  security_report_v4(
      port       : 0,
      severity   : SECURITY_WARNING,
      extra      : rpm_report_get()
  );
  exit(0);
}
else
{
  var tested = pkg_tests_get();
  if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
  else audit(AUDIT_PACKAGE_NOT_INSTALLED, 'emacs-git / emacs-git-el / git / git-all / git-bzr / git-cvs / etc');
}