Ubuntu 14.04 LTS : lxc regression (USN-2753-3)

2015-10-06T00:00:00
ID UBUNTU_USN-2753-3.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

USN-2753-1 fixed a vulnerability in LXC. The update caused a regression that prevented some containers from starting. This regression only affected containers that had a path that contained a

                                        
                                            #
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Ubuntu Security Notice USN-2753-3. 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(86292);
  script_version("2.7");
  script_cvs_date("Date: 2019/09/18 12:31:44");

  script_xref(name:"USN", value:"2753-3");

  script_name(english:"Ubuntu 14.04 LTS : lxc regression (USN-2753-3)");
  script_summary(english:"Checks dpkg output for updated packages.");

  script_set_attribute(
    attribute:"synopsis", 
    value:
"The remote Ubuntu host is missing one or more security-related
patches."
  );
  script_set_attribute(
    attribute:"description", 
    value:
"USN-2753-1 fixed a vulnerability in LXC. The update caused a
regression that prevented some containers from starting. This
regression only affected containers that had a path that contained a
'/./' directory specified as a bind mount target in their
configuration file. This update fixes the problem. We apologize for
the inconvenience.

Roman Fiedler discovered a directory traversal flaw in lxc-start. A
local attacker with access to an LXC container could exploit this flaw
to run programs inside the container that are not confined by AppArmor
or expose unintended files in the host to the container.

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/2753-3/"
  );
  script_set_attribute(attribute:"solution", value:"Update the affected packages.");
  script_set_attribute(attribute:"risk_factor", value:"High");
  script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:liblxc1");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:lxc");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:lxc-dev");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:lxc-templates");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:lxc-tests");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:python3-lxc");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:14.04");

  script_set_attribute(attribute:"vuln_publication_date", value:"2015/10/05");
  script_set_attribute(attribute:"patch_publication_date", value:"2015/10/05");
  script_set_attribute(attribute:"plugin_publication_date", value:"2015/10/06");
  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:"^(14\.04)$", string:release)) audit(AUDIT_OS_NOT, "Ubuntu 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:"14.04", pkgname:"liblxc1", pkgver:"1.0.7-0ubuntu0.7")) flag++;
if (ubuntu_check(osver:"14.04", pkgname:"lxc", pkgver:"1.0.7-0ubuntu0.7")) flag++;
if (ubuntu_check(osver:"14.04", pkgname:"lxc-dev", pkgver:"1.0.7-0ubuntu0.7")) flag++;
if (ubuntu_check(osver:"14.04", pkgname:"lxc-templates", pkgver:"1.0.7-0ubuntu0.7")) flag++;
if (ubuntu_check(osver:"14.04", pkgname:"lxc-tests", pkgver:"1.0.7-0ubuntu0.7")) flag++;
if (ubuntu_check(osver:"14.04", pkgname:"python3-lxc", pkgver:"1.0.7-0ubuntu0.7")) 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, "liblxc1 / lxc / lxc-dev / lxc-templates / lxc-tests / python3-lxc");
}