GitHub < 1.9.4 .git/config Command Execution (Mac OS X)

#
# (C) Tenable Network Security, Inc.
#

include("compat.inc");

if (description)
{
  script_id(80220);
  script_version("1.8");
  script_cvs_date("Date: 2018/07/14  1:59:36");

  script_cve_id("CVE-2014-9390");
  script_bugtraq_id(71732);

  script_name(english:"GitHub < 1.9.4 .git/config Command Execution (Mac OS X)");
  script_summary(english:"Checks the version of GitHub.");

  script_set_attribute(attribute:"synopsis", value:
"The remote host has an application installed that is affected by a
remote command execution vulnerability.");
  script_set_attribute(attribute:"description", value:
"The remote Mac OS X host has a version of GitHub prior to 194
installed. It is, therefore, affected by a remote command execution
vulnerability when processing git trees in a case-insensitive or
case-normalizing file system. A remote attacker, using a specially
crafted git tree, can overwrite a user's '.git/config' file when the
user clones or checks out a repository, allowing arbitrary command
execution.");
  # https://github.com/blog/1938-vulnerability-announced-update-your-git-clients
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?ad68bb83");
  script_set_attribute(attribute:"see_also", value:"http://article.gmane.org/gmane.linux.kernel/1853266");
  # http://git-blame.blogspot.com/2014/12/git-1856-195-205-214-and-221-and.html
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?afc47628");
  script_set_attribute(attribute:"solution", value:"Upgrade to version 1.9.4 or later.");
  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:F/RL:OF/RC:C");
  script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"true");
  script_set_attribute(attribute:"exploit_framework_core", value:"true");
  script_set_attribute(attribute:"metasploit_name", value:'Malicious Git and Mercurial HTTP Server For CVE-2014-9390');
  script_set_attribute(attribute:"exploit_framework_metasploit", value:"true");

  script_set_attribute(attribute:"vuln_publication_date", value:"2014/12/18");
  script_set_attribute(attribute:"patch_publication_date", value:"2014/12/18");
  script_set_attribute(attribute:"plugin_publication_date", value:"2014/12/23");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:github:github");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:git:git");
  script_set_attribute(attribute:"in_the_news", value:"true");
  script_end_attributes();

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

  script_copyright(english:"This script is Copyright (C) 2014-2018 Tenable Network Security, Inc.");

  script_dependencies("macosx_github_installed.nbin");
  script_require_keys("Host/local_checks_enabled", "Host/MacOSX/Version", "installed_sw/GitHub");

  exit(0);
}

include("audit.inc");
include("global_settings.inc");
include("misc_func.inc");
include("install_func.inc");

if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
os = get_kb_item("Host/MacOSX/Version");
if (!os) audit(AUDIT_OS_NOT, "Mac OS X");

appname = "GitHub";

install = get_single_install(app_name:appname, exit_if_unknown_ver:TRUE);
path = install["path"];
ver  = install["version"];

fix = '194';

# Versions are sequential. ver_compare() may be a little
# silly for a single node, but it works.
if (ver_compare(ver:ver, fix:fix, strict:FALSE) == -1)
{
  if (report_verbosity > 0)
  {
    report =
      '\n  Path              : ' + path +
      '\n  Installed version : ' + ver +
      '\n  Fixed version     : ' + fix +
      '\n';
    security_warning(port:0, extra:report);
  }
  else security_warning(port:0);
}
else audit(AUDIT_INST_PATH_NOT_VULN, appname, ver, path);