SB2013100103 - Information disclosure in Xen

Description

This security bulletin contains information about 1 vulnerability.

1) Information disclosure (CVE-ID: CVE-2013-1442)

CWE-ID: CWE-200 - Exposure of sensitive information to an unauthorized actor

CVSSv4: CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear

The vulnerability allows a local non-authenticated attacker to gain access to sensitive information.

Xen 4.0 through 4.3.x, when using AVX or LWP capable CPUs, does not properly clear previous data from registers when using an XSAVE or XRSTOR to extend the state components of a saved or restored vCPU after touching other restored extended registers, which allows local guest OSes to obtain sensitive information by reading the registers.

Remediation

Install update from vendor's website.

References

• http://lists.opensuse.org/opensuse-security-announce/2014-03/msg00021.html
• http://lists.opensuse.org/opensuse-updates/2013-11/msg00009.html
• http://security.gentoo.org/glsa/glsa-201407-03.xml
• http://www.debian.org/security/2014/dsa-3006
• http://www.openwall.com/lists/oss-security/2013/09/25/2
• http://www.securitytracker.com/id/1029090