EulerOS 2.0 SP11 : git (EulerOS-SA-2023-1034)

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

include('compat.inc');

if (description)
{
  script_id(169560);
  script_version("1.0");
  script_set_attribute(attribute:"plugin_modification_date", value:"2023/01/05");

  script_cve_id("CVE-2022-39253", "CVE-2022-39260");

  script_name(english:"EulerOS 2.0 SP11 : git (EulerOS-SA-2023-1034)");

  script_set_attribute(attribute:"synopsis", value:
"The remote EulerOS host is missing multiple security updates.");
  script_set_attribute(attribute:"description", value:
"According to the versions of the git packages installed, the EulerOS installation on the remote host is affected by the
following vulnerabilities :

  - Git is an open source, scalable, distributed revision control system. 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 are subject to exposure of sensitive information to a
    malicious actor. When performing a local clone (where the source and target of the clone are on the same
    volume), Git copies the contents of the source's `$GIT_DIR/objects` directory into the destination by
    either creating hardlinks to the source contents, or copying them (if hardlinks are disabled via `--no-
    hardlinks`). A malicious actor could convince a victim to clone a repository with a symbolic link pointing
    at sensitive information on the victim's machine. This can be done either by having the victim clone a
    malicious repository on the same machine, or having them clone a malicious repository embedded as a bare
    repository via a submodule from any source, provided they clone with the `--recurse-submodules` option.
    Git does not create symbolic links in the `$GIT_DIR/objects` directory. The problem has been patched in
    the versions published on 2022-10-18, and backported to v2.30.x. Potential workarounds: Avoid cloning
    untrusted repositories using the `--local` optimization when on a shared machine, either by passing the
    `--no-local` option to `git clone` or cloning from a URL that uses the `file://` scheme. Alternatively,
    avoid cloning repositories from untrusted sources with `--recurse-submodules` or run `git config --global
    protocol.file.allow user`. (CVE-2022-39253)

  - 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 Tenable Network Security has extracted the preceding description block directly from the EulerOS security
advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional
issues.");
  # https://developer.huaweicloud.com/ict/en/site-euleros/euleros/security-advisories/EulerOS-SA-2023-1034
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?61835720");
  script_set_attribute(attribute:"solution", value:
"Update the affected git packages.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/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:N/AC:L/PR:N/UI:R/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-2022-39260");

  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:"2022/10/18");
  script_set_attribute(attribute:"patch_publication_date", value:"2023/01/05");
  script_set_attribute(attribute:"plugin_publication_date", value:"2023/01/05");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:git");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:git-help");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:huawei:euleros:2.0");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

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

  script_copyright(english:"This script is Copyright (C) 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/cpu", "Host/EulerOS/release", "Host/EulerOS/rpm-list", "Host/EulerOS/sp");
  script_exclude_keys("Host/EulerOS/uvp_version");

  exit(0);
}

include("rpm.inc");

if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);

var _release = get_kb_item("Host/EulerOS/release");
if (isnull(_release) || _release !~ "^EulerOS") audit(AUDIT_OS_NOT, "EulerOS");
var uvp = get_kb_item("Host/EulerOS/uvp_version");
if (_release !~ "^EulerOS release 2\.0(\D|$)") audit(AUDIT_OS_NOT, "EulerOS 2.0 SP11");

var sp = get_kb_item("Host/EulerOS/sp");
if (isnull(sp) || sp !~ "^(11)$") audit(AUDIT_OS_NOT, "EulerOS 2.0 SP11");

if (!empty_or_null(uvp)) audit(AUDIT_OS_NOT, "EulerOS 2.0 SP11", "EulerOS UVP " + uvp);

if (!get_kb_item("Host/EulerOS/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 && cpu !~ "^i[3-6]86$" && "aarch64" >!< cpu && "x86" >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, "EulerOS", cpu);
if ("x86_64" >!< cpu && cpu !~ "^i[3-6]86$" && "x86" >!< cpu) audit(AUDIT_ARCH_NOT, "i686 / x86_64", cpu);

var flag = 0;

var pkgs = [
  "git-2.33.0-1.h5.eulerosv2r11",
  "git-help-2.33.0-1.h5.eulerosv2r11"
];

foreach (var pkg in pkgs)
  if (rpm_check(release:"EulerOS-2.0", sp:"11", reference:pkg)) flag++;

if (flag)
{
  security_report_v4(
    port       : 0,
    severity   : SECURITY_HOLE,
    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, "git");
}