Detections
Analytics
CentOS 5 : xen (CESA-2011:0496)
medium Nessus Plugin ID 53870
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Synopsis
The remote CentOS host is missing one or more security updates.Description
Updated xen packages that fix several security issues are now available for Red Hat Enterprise Linux 5.The Red Hat Security Response Team has rated this update as having important security impact. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available from the CVE link in the References section.
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.
Solution
Update the affected xen packages.See Also
Plugin Details
Severity: Medium
ID: 53870
File Name: centos_RHSA-2011-0496.nasl
Version: 1.9
Type: local
Agent: unix
Family: CentOS Local Security Checks
Published: 5/12/2011
Updated: 1/4/2021
Supported Sensors: Agentless Assessment, Continuous Assessment, Frictionless Assessment Agent, Frictionless Assessment AWS, Frictionless Assessment Azure, Nessus
Risk Information
VPR
Risk Factor: Medium
Score: 6.0
CVSS v2
Risk Factor: Medium
Base Score: 6.9
Vector: CVSS2#AV:L/AC:M/Au:N/C:C/I:C/A:C
Vulnerability Information
CPE: p-cpe:/a:centos:centos:xen-libs, p-cpe:/a:centos:centos:xen-devel, cpe:/o:centos:centos:5, p-cpe:/a:centos:centos:xen
Required KB Items: Host/local_checks_enabled, Host/CentOS/release, Host/CentOS/rpm-list
Patch Publication Date: 5/11/2011
Vulnerability Publication Date: 8/12/2011
Reference Information
CVE: CVE-2011-1583, CVE-2011-3262
RHSA: 2011:0496