Xen emulation information disclosure
|xen-cve20134368-info-disc (87799)||Low Risk|
Xen could allow a local attacker to obtain sensitive information, caused by the use of an uninitialized variable by the emulation of the outs instruction for 64-bit PV guests. An attacker could exploit this vulnerability to obtain contents of the hypervisor stack and other sensitive information.
Refer to XSA-67 for patch, upgrade or suggested workaround information. See References.
For other distributions:
Apply the appropriate update for your system. See References.
- CTX139295: Citrix XenServer Multiple Security Updates .
- XSA-67: Information leak through outs instruction emulation.
- BID-62935: Xen CVE-2013-4368 Information Disclosure Vulnerability
- CVE-2013-4368: The outs instruction emulation in Xen 3.1.x, 4.2.x, 4.3.x, and earlier, when using FS: or GS: segment override, uses an uninitialized variable as a segment base, which allows local 64-bit PV guests to obtain sensitive information (hypervisor stack content) via unspecified vectors related to stale data in a segment register.
- OSVDB ID: 98290: Xen Outs Instruction Emulation Hypervisor Stack Content Local Disclosure
- RHSA-2013-1449: Moderate: kernel security and bug fix update
- SA55310: Citrix XenServer Guest Hypervisor Stack Data Disclosure Weakness
- Citrix XenServer 5.6
- Citrix XenServer 6.0
- Citrix XenServer 6.1
- RedHat Enterprise Linux 5
- RedHat Enterprise Linux 5 Client
- XenSource Xen 4.1
- XenSource Xen 4.2
Oct 10, 2013
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The information within this database may change without notice. Use of this information constitutes acceptance for use in an AS IS condition. There are NO warranties, implied or otherwise, with regard to this information or its use. Any use of this information is at the user's risk. In no event shall IBM be held liable for any damages whatsoever arising out of or in connection with the use or spread of this information.