NewStart CGSL CORE 5.04 / MAIN 5.04 : git Vulnerability (NS-SA-2020-0014)

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


# The descriptive text and package checks in this plugin were
# extracted from ZTE advisory NS-SA-2020-0014. The text
# itself is copyright (C) ZTE, Inc.


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

if (description)
{
  script_id(135761);
  script_version("1.4");
  script_set_attribute(attribute:"plugin_modification_date", value:"2021/01/14");

  script_cve_id("CVE-2019-1387");

  script_name(english:"NewStart CGSL CORE 5.04 / MAIN 5.04 : git Vulnerability (NS-SA-2020-0014)");

  script_set_attribute(attribute:"synopsis", value:
"The remote machine is affected by a vulnerability.");
  script_set_attribute(attribute:"description", value:
"The remote NewStart CGSL host, running version CORE 5.04 / MAIN 5.04, has git packages installed that are affected by a
vulnerability:

  - A flaw was discovered where git improperly validates
    submodules' names used to construct git metadata paths
    and does not prevent them from being nested in existing
    directories used to store another submodule's metadata.
    A remote attacker could abuse this flaw to trick a
    victim user into cloning a malicious repository
    containing submodules, which, when recursively cloned,
    would trigger the flaw and remotely execute code on the
    victim's machine. (CVE-2019-1387)

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:"http://security.gd-linux.com/notice/NS-SA-2020-0014");
  script_set_attribute(attribute:"solution", value:
"Upgrade the vulnerable CGSL git packages. Note that updated packages may not be available yet. Please contact ZTE for
more information.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:N/C:P/I:P/A:P");
  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-2019-1387");

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

  script_set_attribute(attribute:"vuln_publication_date", value:"2020/03/04");
  script_set_attribute(attribute:"patch_publication_date", value:"2020/03/04");
  script_set_attribute(attribute:"plugin_publication_date", value:"2020/04/21");

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

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

  script_copyright(english:"This script is Copyright (C) 2020-2021 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("ssh_get_info.nasl");
  script_require_keys("Host/local_checks_enabled", "Host/ZTE-CGSL/release", "Host/ZTE-CGSL/rpm-list", "Host/cpu");

  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/ZTE-CGSL/release");
if (isnull(release) || release !~ "^CGSL (MAIN|CORE)") audit(AUDIT_OS_NOT, "NewStart Carrier Grade Server Linux");

if (release !~ "CGSL CORE 5.04" &&
    release !~ "CGSL MAIN 5.04")
  audit(AUDIT_OS_NOT, 'NewStart CGSL CORE 5.04 / NewStart CGSL MAIN 5.04');

if (!get_kb_item("Host/ZTE-CGSL/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$") audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, "NewStart Carrier Grade Server Linux", cpu);

flag = 0;

pkgs = {
  "CGSL CORE 5.04": [
    "emacs-git-1.8.3.1-21.el7_7",
    "emacs-git-el-1.8.3.1-21.el7_7",
    "git-1.8.3.1-21.el7_7",
    "git-all-1.8.3.1-21.el7_7",
    "git-bzr-1.8.3.1-21.el7_7",
    "git-cvs-1.8.3.1-21.el7_7",
    "git-daemon-1.8.3.1-21.el7_7",
    "git-debuginfo-1.8.3.1-21.el7_7",
    "git-email-1.8.3.1-21.el7_7",
    "git-gnome-keyring-1.8.3.1-21.el7_7",
    "git-gui-1.8.3.1-21.el7_7",
    "git-hg-1.8.3.1-21.el7_7",
    "git-instaweb-1.8.3.1-21.el7_7",
    "git-p4-1.8.3.1-21.el7_7",
    "git-svn-1.8.3.1-21.el7_7",
    "gitk-1.8.3.1-21.el7_7",
    "gitweb-1.8.3.1-21.el7_7",
    "perl-Git-1.8.3.1-21.el7_7",
    "perl-Git-SVN-1.8.3.1-21.el7_7"
  ],
  "CGSL MAIN 5.04": [
    "emacs-git-1.8.3.1-21.el7_7",
    "emacs-git-el-1.8.3.1-21.el7_7",
    "git-1.8.3.1-21.el7_7",
    "git-all-1.8.3.1-21.el7_7",
    "git-bzr-1.8.3.1-21.el7_7",
    "git-cvs-1.8.3.1-21.el7_7",
    "git-daemon-1.8.3.1-21.el7_7",
    "git-debuginfo-1.8.3.1-21.el7_7",
    "git-email-1.8.3.1-21.el7_7",
    "git-gnome-keyring-1.8.3.1-21.el7_7",
    "git-gui-1.8.3.1-21.el7_7",
    "git-hg-1.8.3.1-21.el7_7",
    "git-instaweb-1.8.3.1-21.el7_7",
    "git-p4-1.8.3.1-21.el7_7",
    "git-svn-1.8.3.1-21.el7_7",
    "gitk-1.8.3.1-21.el7_7",
    "gitweb-1.8.3.1-21.el7_7",
    "perl-Git-1.8.3.1-21.el7_7",
    "perl-Git-SVN-1.8.3.1-21.el7_7"
  ]
};
pkg_list = pkgs[release];

foreach (pkg in pkg_list)
  if (rpm_check(release:"ZTE " + release, 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");
}