Ubuntu 12.04 LTS / 12.10 : ruby1.9.1 vulnerabilities (USN-1614-1)

2012-10-23T00:00:00
ID UBUNTU_USN-1614-1.NASL
Type nessus
Reporter Tenable
Modified 2018-12-01T00:00:00

Description

Tyler Hicks and Shugo Maeda discovered that Ruby incorrectly allowed untainted strings to be modified in protective safe levels. An attacker could use this flaw to bypass intended access restrictions. USN-1602-1 fixed these vulnerabilities in other Ubuntu releases. This update provides the corresponding updates for Ubuntu 12.10. (CVE-2012-4464, CVE-2012-4466)

Peter Bex discovered that Ruby incorrectly handled file path strings when opening files. An attacker could use this flaw to open or create unexpected files. (CVE-2012-4522).

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-1614-1. 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(62661);
  script_version("1.7");
  script_cvs_date("Date: 2018/12/01 13:19:07");

  script_cve_id("CVE-2012-4464", "CVE-2012-4466", "CVE-2012-4522");
  script_bugtraq_id(55757, 56115);
  script_xref(name:"USN", value:"1614-1");

  script_name(english:"Ubuntu 12.04 LTS / 12.10 : ruby1.9.1 vulnerabilities (USN-1614-1)");
  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:
"Tyler Hicks and Shugo Maeda discovered that Ruby incorrectly allowed
untainted strings to be modified in protective safe levels. An
attacker could use this flaw to bypass intended access restrictions.
USN-1602-1 fixed these vulnerabilities in other Ubuntu releases. This
update provides the corresponding updates for Ubuntu 12.10.
(CVE-2012-4464, CVE-2012-4466)

Peter Bex discovered that Ruby incorrectly handled file path strings
when opening files. An attacker could use this flaw to open or create
unexpected files. (CVE-2012-4522).

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/1614-1/"
  );
  script_set_attribute(
    attribute:"solution", 
    value:"Update the affected libruby1.9.1 package."
  );
  script_set_cvss_base_vector("CVSS2#AV:N/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:libruby1.9.1");
  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:12.10");

  script_set_attribute(attribute:"patch_publication_date", value:"2012/10/22");
  script_set_attribute(attribute:"plugin_publication_date", value:"2012/10/23");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"Ubuntu Security Notice (C) 2012-2018 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|12\.10)$", string:release)) audit(AUDIT_OS_NOT, "Ubuntu 12.04 / 12.10", "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:"12.04", pkgname:"libruby1.9.1", pkgver:"1.9.3.0-1ubuntu2.4")) flag++;
if (ubuntu_check(osver:"12.10", pkgname:"libruby1.9.1", pkgver:"1.9.3.194-1ubuntu1.2")) 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, "libruby1.9.1");
}