SB2012121306 - Input validation error in Xen

Description

This security bulletin contains information about 1 security vulnerability.

1) Input validation error (CVE-ID: CVE-2012-5515)

The vulnerability allows a remote non-authenticated attacker to perform a denial of service (DoS) attack.

The (1) XENMEM_decrease_reservation, (2) XENMEM_populate_physmap, and (3) XENMEM_exchange hypercalls in Xen 4.2 and earlier allow local guest administrators to cause a denial of service (long loop and hang) via a crafted extent_order value.

Remediation

Install update from vendor's website.

References

• http://lists.opensuse.org/opensuse-security-announce/2012-12/msg00000.html
• http://lists.opensuse.org/opensuse-security-announce/2012-12/msg00001.html
• http://lists.opensuse.org/opensuse-security-announce/2012-12/msg00018.html
• http://lists.opensuse.org/opensuse-security-announce/2012-12/msg00019.html
• http://lists.opensuse.org/opensuse-security-announce/2013-01/msg00011.html
• http://lists.opensuse.org/opensuse-security-announce/2014-03/msg00021.html
• http://lists.opensuse.org/opensuse-security-announce/2014-04/msg00000.html
• http://lists.opensuse.org/opensuse-updates/2013-04/msg00051.html
• http://lists.opensuse.org/opensuse-updates/2013-04/msg00052.html
• http://lists.xen.org/archives/html/xen-announce/2012-12/msg00001.html
• http://secunia.com/advisories/51397
• http://secunia.com/advisories/51468
• http://secunia.com/advisories/51486
• http://secunia.com/advisories/51487
• http://secunia.com/advisories/51495
• http://secunia.com/advisories/55082
• http://security.gentoo.org/glsa/glsa-201309-24.xml
• http://support.citrix.com/article/CTX135777
• http://www.debian.org/security/2012/dsa-2582
• http://www.openwall.com/lists/oss-security/2012/12/03/9
• http://www.osvdb.org/88127
• http://www.securityfocus.com/bid/56798
• https://exchange.xforce.ibmcloud.com/vulnerabilities/80479