RedHat Update for xen RHSA-2011:0496-01

###############################################################################
# OpenVAS Vulnerability Test
#
# RedHat Update for xen RHSA-2011:0496-01
#
# Authors:
# System Generated Check
#
# Copyright:
# Copyright (c) 2011 Greenbone Networks GmbH, http://www.greenbone.net
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License version 2
# (or any later version), as published by the Free Software Foundation.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
###############################################################################

include("revisions-lib.inc");
tag_insight = "The xen packages contain administration tools and the xend service for
  managing the kernel-xen kernel for virtualization on Red Hat Enterprise
  Linux.

  It was found that the xc_try_bzip2_decode() and xc_try_lzma_decode() decode
  routines did not correctly check for a possible buffer size overflow in the
  decoding loop. As well, several integer overflow flaws and missing
  error/range checking were found that could lead to an infinite loop. A
  privileged guest user could use these flaws to crash the guest or,
  possibly, execute arbitrary code in the privileged management domain
  (Dom0). (CVE-2011-1583)
  
  All xen users are advised to upgrade to these updated packages, which
  contain backported patches to correct these issues. The system must be
  rebooted for this update to take effect.";

tag_affected = "xen on Red Hat Enterprise Linux (v. 5 server)";
tag_solution = "Please Install the Updated Packages.";


if(description)
{
  script_xref(name : "URL" , value : "https://www.redhat.com/archives/rhsa-announce/2011-May/msg00007.html");
  script_id(870433);
  script_version("$Revision: 6685 $");
  script_tag(name:"last_modification", value:"$Date: 2017-07-12 11:44:46 +0200 (Wed, 12 Jul 2017) $");
  script_tag(name:"creation_date", value:"2011-05-17 15:58:48 +0200 (Tue, 17 May 2011)");
  script_tag(name:"cvss_base", value:"6.9");
  script_tag(name:"cvss_base_vector", value:"AV:L/AC:M/Au:N/C:C/I:C/A:C");
  script_xref(name: "RHSA", value: "2011:0496-01");
  script_cve_id("CVE-2011-1583");
  script_name("RedHat Update for xen RHSA-2011:0496-01");

  script_summary("Check for the Version of xen");
  script_category(ACT_GATHER_INFO);
  script_copyright("Copyright (c) 2011 Greenbone Networks GmbH");
  script_family("Red Hat Local Security Checks");
  script_dependencies("gather-package-list.nasl");
  script_mandatory_keys("ssh/login/rhel", "ssh/login/rpms");
  script_tag(name : "affected" , value : tag_affected);
  script_tag(name : "solution" , value : tag_solution);
  script_tag(name : "insight" , value : tag_insight);
  script_tag(name:"qod_type", value:"package");
  script_tag(name:"solution_type", value:"VendorFix");
  exit(0);
}


include("pkg-lib-rpm.inc");

release = get_kb_item("ssh/login/release");


res = "";
if(release == NULL){
  exit(0);
}

if(release == "RHENT_5")
{

  if ((res = isrpmvuln(pkg:"xen-debuginfo", rpm:"xen-debuginfo~3.0.3~120.el5_6.2", rls:"RHENT_5")) != NULL)
  {
    security_message(data:res);
    exit(0);
  }

  if ((res = isrpmvuln(pkg:"xen-libs", rpm:"xen-libs~3.0.3~120.el5_6.2", rls:"RHENT_5")) != NULL)
  {
    security_message(data:res);
    exit(0);
  }

  if (__pkg_match) exit(99); # Not vulnerable.
  exit(0);
}