CVEvulnerability

CVE-2013-2076

4.3 MEDIUM Published 2013-08-28 Modified 2026-06-16 Official page ↗
Status
Modified
Published
2013-08-28
Last modified
2026-06-16
Assigner
[email protected]
CVSS 2.0 ([email protected])
4.3 MEDIUM — AV:A/AC:H/Au:S/C:C/I:N/A:N
Weaknesses
CWE-200

Description

Xen 4.0.x, 4.1.x, and 4.2.x, when running on AMD64 processors, only save/restore the FOP, FIP, and FDP x87 registers in FXSAVE/FXRSTOR when an exception is pending, which allows one domain to determine portions of the state of floating point instructions of other domains, which can be leveraged to obtain sensitive information such as cryptographic keys, a similar vulnerability to CVE-2006-1056. NOTE: this is the documented behavior of AMD64 processors, but it is inconsistent with Intel processors in a security-relevant fashion that was not addressed by the kernels.

Affected configurations

• xen xen 4.0.0 • xen xen 4.0.1 • xen xen 4.0.2 • xen xen 4.0.3 • xen xen 4.0.4 • xen xen 4.2.0 • xen xen 4.2.1 • xen xen 4.2.2 • xen xen 4.1.0 • xen xen 4.1.1 • xen xen 4.1.2 • xen xen 4.1.3 • xen xen 4.1.4 • xen xen 4.1.5

Related

Weakness · CWE (1)

  • CWE-200 Exposure of Sensitive Information to an Unauthorized Actor weakness

References