Ubuntu 12.04 LTS / 13.10 / 14.04 LTS : json-c vulnerabilities (USN-2245-1)

2014-06-13T00:00:00
ID UBUNTU_USN-2245-1.NASL
Type nessus
Reporter Tenable
Modified 2018-12-01T00:00:00

Description

Florian Weimer discovered that json-c incorrectly handled buffer lengths. An attacker could use this issue with a specially crafted large JSON document to cause json-c to crash, resulting in a denial of service. (CVE-2013-6370)

Florian Weimer discovered that json-c incorrectly handled hash arrays. An attacker could use this issue with a specially crafted JSON document to cause json-c to consume CPU resources, resulting in a denial of service. (CVE-2013-6371).

Note that Tenable Network Security has extracted the preceding description block directly from the Ubuntu security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

                                        
                                            #
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Ubuntu Security Notice USN-2245-1. The text 
# itself is copyright (C) Canonical, Inc. See 
# <http://www.ubuntu.com/usn/>. Ubuntu(R) is a registered 
# trademark of Canonical, Inc.
#

include("compat.inc");

if (description)
{
  script_id(74509);
  script_version("1.6");
  script_cvs_date("Date: 2018/12/01 15:12:39");

  script_cve_id("CVE-2013-6370", "CVE-2013-6371");
  script_bugtraq_id(66715, 66720);
  script_xref(name:"USN", value:"2245-1");

  script_name(english:"Ubuntu 12.04 LTS / 13.10 / 14.04 LTS : json-c vulnerabilities (USN-2245-1)");
  script_summary(english:"Checks dpkg output for updated package.");

  script_set_attribute(
    attribute:"synopsis", 
    value:"The remote Ubuntu host is missing a security-related patch."
  );
  script_set_attribute(
    attribute:"description", 
    value:
"Florian Weimer discovered that json-c incorrectly handled buffer
lengths. An attacker could use this issue with a specially crafted
large JSON document to cause json-c to crash, resulting in a denial of
service. (CVE-2013-6370)

Florian Weimer discovered that json-c incorrectly handled hash arrays.
An attacker could use this issue with a specially crafted JSON
document to cause json-c to consume CPU resources, resulting in a
denial of service. (CVE-2013-6371).

Note that Tenable Network Security has extracted the preceding
description block directly from the Ubuntu security advisory. Tenable
has attempted to automatically clean and format it as much as possible
without introducing additional issues."
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://usn.ubuntu.com/2245-1/"
  );
  script_set_attribute(
    attribute:"solution", 
    value:"Update the affected libjson0 package."
  );
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:P");
  script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"false");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libjson0");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:12.04:-:lts");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:13.10");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:14.04");

  script_set_attribute(attribute:"patch_publication_date", value:"2014/06/12");
  script_set_attribute(attribute:"plugin_publication_date", value:"2014/06/13");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"Ubuntu Security Notice (C) 2014-2018 Canonical, Inc. / NASL script (C) 2018 and is owned by Tenable, Inc. or an Affiliate thereof.");
  script_family(english:"Ubuntu Local Security Checks");

  script_dependencies("ssh_get_info.nasl");
  script_require_keys("Host/cpu", "Host/Ubuntu", "Host/Ubuntu/release", "Host/Debian/dpkg-l");

  exit(0);
}


include("audit.inc");
include("ubuntu.inc");
include("misc_func.inc");

if ( ! get_kb_item("Host/local_checks_enabled") ) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
release = get_kb_item("Host/Ubuntu/release");
if ( isnull(release) ) audit(AUDIT_OS_NOT, "Ubuntu");
release = chomp(release);
if (! ereg(pattern:"^(12\.04|13\.10|14\.04)$", string:release)) audit(AUDIT_OS_NOT, "Ubuntu 12.04 / 13.10 / 14.04", "Ubuntu " + release);
if ( ! get_kb_item("Host/Debian/dpkg-l") ) 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, "Ubuntu", cpu);

flag = 0;

if (ubuntu_check(osver:"12.04", pkgname:"libjson0", pkgver:"0.9-1ubuntu1.1")) flag++;
if (ubuntu_check(osver:"13.10", pkgname:"libjson0", pkgver:"0.11-2ubuntu1.2")) flag++;
if (ubuntu_check(osver:"14.04", pkgname:"libjson0", pkgver:"0.11-3ubuntu1.2")) flag++;

if (flag)
{
  security_report_v4(
    port       : 0,
    severity   : SECURITY_WARNING,
    extra      : ubuntu_report_get()
  );
  exit(0);
}
else
{
  tested = ubuntu_pkg_tests_get();
  if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
  else audit(AUDIT_PACKAGE_NOT_INSTALLED, "libjson0");
}