CentOS 7 : git (CESA-2018:3408)

#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were  
# extracted from Red Hat Security Advisory RHSA-2018:3408 and 
# CentOS Errata and Security Advisory 2018:3408 respectively.
#

include("compat.inc");

if (description)
{
  script_id(119046);
  script_version("1.6");
  script_cvs_date("Date: 2019/12/31");

  script_cve_id("CVE-2018-17456");
  script_xref(name:"RHSA", value:"2018:3408");

  script_name(english:"CentOS 7 : git (CESA-2018:3408)");
  script_summary(english:"Checks rpm output for the updated packages");

  script_set_attribute(
    attribute:"synopsis", 
    value:"The remote CentOS host is missing one or more security updates."
  );
  script_set_attribute(
    attribute:"description", 
    value:
"An update for git is now available for Red Hat Enterprise Linux 7.

Red Hat Product Security has rated this update as having a security
impact of Important. A Common Vulnerability Scoring System (CVSS) base
score, which gives a detailed severity rating, is available for each
vulnerability from the CVE link(s) in the References section.

Git is a distributed revision control system with a decentralized
architecture. As opposed to centralized version control systems with a
client-server model, Git ensures that each working copy of a Git
repository is an exact copy with complete revision history. This not
only allows the user to work on and contribute to projects without the
need to have permission to push the changes to their official
repositories, but also makes it possible for the user to work with no
network connection.

Security Fix(es) :

* git: arbitrary code execution via .gitmodules (CVE-2018-17456)

For more details about the security issue(s), including the impact, a
CVSS score, and other related information, refer to the CVE page(s)
listed in the References section."
  );
  # https://lists.centos.org/pipermail/centos-announce/2018-December/023102.html
  script_set_attribute(
    attribute:"see_also",
    value:"http://www.nessus.org/u?908b53b3"
  );
  # https://lists.centos.org/pipermail/centos-cr-announce/2018-November/005748.html
  script_set_attribute(
    attribute:"see_also",
    value:"http://www.nessus.org/u?39b5ff45"
  );
  script_set_attribute(attribute:"solution", value:"Update the affected git packages.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P");
  script_set_cvss_temporal_vector("CVSS2#E:F/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:H/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:F/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2018-17456");
  script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"true");
  script_set_attribute(attribute:"metasploit_name", value:'Malicious Git HTTP Server For CVE-2018-17456');
  script_set_attribute(attribute:"exploit_framework_metasploit", value:"true");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:emacs-git");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:emacs-git-el");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:git");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:git-all");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:git-bzr");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:git-cvs");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:git-daemon");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:git-email");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:git-gnome-keyring");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:git-gui");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:git-hg");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:git-instaweb");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:git-p4");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:git-svn");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:gitk");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:gitweb");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:perl-Git");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:perl-Git-SVN");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:centos:centos:7");

  script_set_attribute(attribute:"vuln_publication_date", value:"2018/10/06");
  script_set_attribute(attribute:"patch_publication_date", value:"2018/12/13");
  script_set_attribute(attribute:"plugin_publication_date", value:"2018/11/21");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2018-2019 and is owned by Tenable, Inc. or an Affiliate thereof.");
  script_family(english:"CentOS Local Security Checks");

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

  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/CentOS/release");
if (isnull(release) || "CentOS" >!< release) audit(AUDIT_OS_NOT, "CentOS");
os_ver = pregmatch(pattern: "CentOS(?: Linux)? release ([0-9]+)", string:release);
if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, "CentOS");
os_ver = os_ver[1];
if (! preg(pattern:"^7([^0-9]|$)", string:os_ver)) audit(AUDIT_OS_NOT, "CentOS 7.x", "CentOS " + os_ver);

if (!get_kb_item("Host/CentOS/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, "CentOS", cpu);


flag = 0;
if (rpm_check(release:"CentOS-7", cpu:"x86_64", reference:"emacs-git-1.8.3.1-20.el7")) flag++;
if (rpm_check(release:"CentOS-7", cpu:"x86_64", reference:"emacs-git-el-1.8.3.1-20.el7")) flag++;
if (rpm_check(release:"CentOS-7", cpu:"x86_64", reference:"git-1.8.3.1-20.el7")) flag++;
if (rpm_check(release:"CentOS-7", cpu:"x86_64", reference:"git-all-1.8.3.1-20.el7")) flag++;
if (rpm_check(release:"CentOS-7", cpu:"x86_64", reference:"git-bzr-1.8.3.1-20.el7")) flag++;
if (rpm_check(release:"CentOS-7", cpu:"x86_64", reference:"git-cvs-1.8.3.1-20.el7")) flag++;
if (rpm_check(release:"CentOS-7", cpu:"x86_64", reference:"git-daemon-1.8.3.1-20.el7")) flag++;
if (rpm_check(release:"CentOS-7", cpu:"x86_64", reference:"git-email-1.8.3.1-20.el7")) flag++;
if (rpm_check(release:"CentOS-7", cpu:"x86_64", reference:"git-gnome-keyring-1.8.3.1-20.el7")) flag++;
if (rpm_check(release:"CentOS-7", cpu:"x86_64", reference:"git-gui-1.8.3.1-20.el7")) flag++;
if (rpm_check(release:"CentOS-7", cpu:"x86_64", reference:"git-hg-1.8.3.1-20.el7")) flag++;
if (rpm_check(release:"CentOS-7", cpu:"x86_64", reference:"git-instaweb-1.8.3.1-20.el7")) flag++;
if (rpm_check(release:"CentOS-7", cpu:"x86_64", reference:"git-p4-1.8.3.1-20.el7")) flag++;
if (rpm_check(release:"CentOS-7", cpu:"x86_64", reference:"git-svn-1.8.3.1-20.el7")) flag++;
if (rpm_check(release:"CentOS-7", cpu:"x86_64", reference:"gitk-1.8.3.1-20.el7")) flag++;
if (rpm_check(release:"CentOS-7", cpu:"x86_64", reference:"gitweb-1.8.3.1-20.el7")) flag++;
if (rpm_check(release:"CentOS-7", cpu:"x86_64", reference:"perl-Git-1.8.3.1-20.el7")) flag++;
if (rpm_check(release:"CentOS-7", cpu:"x86_64", reference:"perl-Git-SVN-1.8.3.1-20.el7")) flag++;


if (flag)
{
  cr_plugin_caveat = '\n' +
    'NOTE: The security advisory associated with this vulnerability has a\n' +
    'fixed package version that may only be available in the continuous\n' +
    'release (CR) repository for CentOS, until it is present in the next\n' +
    'point release of CentOS.\n\n' +

    'If an equal or higher package level does not exist in the baseline\n' +
    'repository for your major version of CentOS, then updates from the CR\n' +
    'repository will need to be applied in order to address the\n' +
    'vulnerability.\n';
  security_report_v4(
    port       : 0,
    severity   : SECURITY_HOLE,
    extra      : rpm_report_get() + cr_plugin_caveat
  );
  exit(0);
}
else
{
  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");
}