EulerOS 2.0 SP2 : git (EulerOS-SA-2021-1298)

#%NASL_MIN_LEVEL 70300
#
# (C) Tenable Network Security, Inc.
#

include('deprecated_nasl_level.inc');
include('compat.inc');

if (description)
{
  script_id(146765);
  script_version("1.3");
  script_set_attribute(attribute:"plugin_modification_date", value:"2024/01/19");

  script_cve_id("CVE-2020-11008");

  script_name(english:"EulerOS 2.0 SP2 : git (EulerOS-SA-2021-1298)");

  script_set_attribute(attribute:"synopsis", value:
"The remote EulerOS host is missing a security update.");
  script_set_attribute(attribute:"description", value:
"According to the version of the git packages installed, the EulerOS
installation on the remote host is affected by the following
vulnerability :

  - Git is a fast, scalable, distributed revision control
    system with an unusually rich command set that provides
    both high-level operations and full access to
    internals. The git rpm installs common set of tools
    which are usually using with small amount of
    dependencies. To install all git packages, including
    tools for integrating with other SCMs, install the
    git-all meta-package.Security Fix(es):Affected versions
    of Git have a vulnerability whereby Git can be tricked
    into sending private credentials to a host controlled
    by an attacker. This bug is similar to
    CVE-2020-5260(GHSA-qm7j-c969-7j4q). The fix for that
    bug still left the door open for an exploit where
    _some_ credential is leaked (but the attacker cannot
    control which one). Git uses external 'credential
    helper' programs to store and retrieve passwords or
    other credentials from secure storage provided by the
    operating system. Specially-crafted URLs that are
    considered illegal as of the recently published Git
    versions can cause Git to send a 'blank' pattern to
    helpers, missing hostname and protocol fields. Many
    helpers will interpret this as matching _any_ URL, and
    will return some unspecified stored password, leaking
    the password to an attacker's server. The vulnerability
    can be triggered by feeding a malicious URL to `git
    clone`. However, the affected URLs look rather
    suspicious the likely vector would be through systems
    which automatically clone URLs not visible to the user,
    such as Git submodules, or package systems built around
    Git. The root of the problem is in Git itself, which
    should not be feeding blank input to helpers. However,
    the ability to exploit the vulnerability in practice
    depends on which helpers are in use. Credential helpers
    which are known to trigger the vulnerability: - Git's
    'store' helper - Git's 'cache' helper - the
    'osxkeychain' helper that ships in Git's 'contrib'
    directory Credential helpers which are known to be safe
    even with vulnerable versions of Git: - Git Credential
    Manager for Windows Any helper not in this list should
    be assumed to trigger the
    vulnerability.(CVE-2020-11008)

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-2021-1298
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?f672beef");
  script_set_attribute(attribute:"solution", value:
"Update the affected git package.");
  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:U/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2020-11008");

  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"false");

  script_set_attribute(attribute:"patch_publication_date", value:"2021/02/19");
  script_set_attribute(attribute:"plugin_publication_date", value:"2021/02/22");

  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:perl-Git");
  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) 2021-2024 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("ssh_get_info.nasl");
  script_require_keys("Host/local_checks_enabled", "Host/EulerOS/release", "Host/EulerOS/rpm-list", "Host/EulerOS/sp");
  script_exclude_keys("Host/EulerOS/uvp_version");

  exit(0);
}

include("audit.inc");
include("global_settings.inc");
include("rpm.inc");

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

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

sp = get_kb_item("Host/EulerOS/sp");
if (isnull(sp) || sp !~ "^(2)$") audit(AUDIT_OS_NOT, "EulerOS 2.0 SP2");

uvp = get_kb_item("Host/EulerOS/uvp_version");
if (!empty_or_null(uvp)) audit(AUDIT_OS_NOT, "EulerOS 2.0 SP2", "EulerOS UVP " + uvp);

if (!get_kb_item("Host/EulerOS/rpm-list")) audit(AUDIT_PACKAGE_LIST_MISSING);

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

flag = 0;

pkgs = ["git-1.8.3.1-14.h6",
        "perl-Git-1.8.3.1-14.h6"];

foreach (pkg in pkgs)
  if (rpm_check(release:"EulerOS-2.0", sp:"2", reference:pkg)) flag++;

if (flag)
{
  security_report_v4(
    port       : 0,
    severity   : SECURITY_WARNING,
    extra      : rpm_report_get()
  );
  exit(0);
}
else
{
  tested = pkg_tests_get();
  if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
  else audit(AUDIT_PACKAGE_NOT_INSTALLED, "git");
}