Ubuntu 10.04 LTS / 12.04 LTS / 14.04 LTS / 14.10 : eglibc, glibc vulnerabilities (USN-2519-1)

2015-02-27T00:00:00
ID UBUNTU_USN-2519-1.NASL
Type nessus
Reporter Ubuntu Security Notice (C) 2015-2019 Canonical, Inc. / NASL script (C) 2015-2019 and is owned by Tenable, Inc. or an Affiliate thereof.
Modified 2020-02-02T00:00:00

Description

Arnaud Le Blanc discovered that the GNU C Library incorrectly handled file descriptors when resolving DNS queries under high load. This may cause a denial of service in other applications, or an information leak. This issue only affected Ubuntu 10.04 LTS, Ubuntu 12.04 LTS and Ubuntu 14.04 LTS. (CVE-2013-7423)

It was discovered that the GNU C Library incorrectly handled receiving a positive answer while processing the network name when performing DNS resolution. A remote attacker could use this issue to cause the GNU C Library to hang, resulting in a denial of service. (CVE-2014-9402)

Joseph Myers discovered that the GNU C Library wscanf function incorrectly handled memory. A remote attacker could possibly use this issue to cause the GNU C Library to crash, resulting in a denial of service, or possibly execute arbitrary code. This issue only affected Ubuntu 12.04 LTS, Ubuntu 14.04 LTS and Ubuntu 14.10. (CVE-2015-1472, CVE-2015-1473).

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-2519-1. 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(81572);
  script_version("1.15");
  script_cvs_date("Date: 2019/09/18 12:31:44");

  script_cve_id("CVE-2013-7423", "CVE-2014-9402", "CVE-2015-1472", "CVE-2015-1473");
  script_bugtraq_id(71670, 72428, 72499);
  script_xref(name:"USN", value:"2519-1");

  script_name(english:"Ubuntu 10.04 LTS / 12.04 LTS / 14.04 LTS / 14.10 : eglibc, glibc vulnerabilities (USN-2519-1)");
  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:
"Arnaud Le Blanc discovered that the GNU C Library incorrectly handled
file descriptors when resolving DNS queries under high load. This may
cause a denial of service in other applications, or an information
leak. This issue only affected Ubuntu 10.04 LTS, Ubuntu 12.04 LTS and
Ubuntu 14.04 LTS. (CVE-2013-7423)

It was discovered that the GNU C Library incorrectly handled receiving
a positive answer while processing the network name when performing
DNS resolution. A remote attacker could use this issue to cause the
GNU C Library to hang, resulting in a denial of service.
(CVE-2014-9402)

Joseph Myers discovered that the GNU C Library wscanf function
incorrectly handled memory. A remote attacker could possibly use this
issue to cause the GNU C Library to crash, resulting in a denial of
service, or possibly execute arbitrary code. This issue only affected
Ubuntu 12.04 LTS, Ubuntu 14.04 LTS and Ubuntu 14.10. (CVE-2015-1472,
CVE-2015-1473).

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/2519-1/"
  );
  script_set_attribute(attribute:"solution", value:"Update the affected libc6 package.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:C");
  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:libc6");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:10.04:-:lts");
  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:14.04");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:14.10");

  script_set_attribute(attribute:"vuln_publication_date", value:"2015/02/24");
  script_set_attribute(attribute:"patch_publication_date", value:"2015/02/26");
  script_set_attribute(attribute:"plugin_publication_date", value:"2015/02/27");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"Ubuntu Security Notice (C) 2015-2019 Canonical, Inc. / NASL script (C) 2015-2019 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 (! preg(pattern:"^(10\.04|12\.04|14\.04|14\.10)$", string:release)) audit(AUDIT_OS_NOT, "Ubuntu 10.04 / 12.04 / 14.04 / 14.10", "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:"10.04", pkgname:"libc6", pkgver:"2.11.1-0ubuntu7.21")) flag++;
if (ubuntu_check(osver:"12.04", pkgname:"libc6", pkgver:"2.15-0ubuntu10.11")) flag++;
if (ubuntu_check(osver:"14.04", pkgname:"libc6", pkgver:"2.19-0ubuntu6.6")) flag++;
if (ubuntu_check(osver:"14.10", pkgname:"libc6", pkgver:"2.19-10ubuntu2.3")) flag++;

if (flag)
{
  security_report_v4(
    port       : 0,
    severity   : SECURITY_HOLE,
    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, "libc6");
}