Ubuntu 14.04 LTS / 15.04 : unity-settings-daemon vulnerability (USN-2741-1)

2015-09-17T00:00:00
ID UBUNTU_USN-2741-1.NASL
Type nessus
Reporter Tenable
Modified 2018-12-01T00:00:00

Description

It was discovered that the Unity Settings Daemon incorrectly allowed removable media to be mounted when the screen is locked. If a vulnerability were discovered in some other desktop component, such as an image library, a local attacker could possibly use this issue to gain access to the session.

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-2741-1. 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(85983);
  script_version("1.6");
  script_cvs_date("Date: 2018/12/01 15:12:40");

  script_cve_id("CVE-2015-1319");
  script_xref(name:"USN", value:"2741-1");

  script_name(english:"Ubuntu 14.04 LTS / 15.04 : unity-settings-daemon vulnerability (USN-2741-1)");
  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:
"It was discovered that the Unity Settings Daemon incorrectly allowed
removable media to be mounted when the screen is locked. If a
vulnerability were discovered in some other desktop component, such as
an image library, a local attacker could possibly use this issue to
gain access to the session.

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/2741-1/"
  );
  script_set_attribute(
    attribute:"solution", 
    value:"Update the affected unity-settings-daemon package."
  );
  script_set_cvss_base_vector("CVSS2#AV:L/AC:L/Au:N/C:N/I:P/A:N");
  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:unity-settings-daemon");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:14.04");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:15.04");

  script_set_attribute(attribute:"patch_publication_date", value:"2015/09/16");
  script_set_attribute(attribute:"plugin_publication_date", value:"2015/09/17");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"Ubuntu Security Notice (C) 2015-2018 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:"^(14\.04|15\.04)$", string:release)) audit(AUDIT_OS_NOT, "Ubuntu 14.04 / 15.04", "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:"unity-settings-daemon", pkgver:"14.04.0+14.04.20150825-0ubuntu2")) flag++;
if (ubuntu_check(osver:"15.04", pkgname:"unity-settings-daemon", pkgver:"15.04.1+15.04.20150408-0ubuntu1.2")) flag++;

if (flag)
{
  security_report_v4(
    port       : 0,
    severity   : SECURITY_NOTE,
    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, "unity-settings-daemon");
}