CVE-2013-2076

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.

Category

4.3
CVSS
Severity: Medium
CVSS 2.0 •
EPSS 0.18%
Vendor Advisory gentoo.org Vendor Advisory opensuse.org Vendor Advisory debian.org
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
http://secunia.com/advisories/55082 third party advisory
http://security.gentoo.org/glsa/glsa-201309-24.xml vendor advisory
http://www.openwall.com/lists/oss-security/2013/06/03/1 mailing list
http://lists.opensuse.org/opensuse-security-announce/2014-03/msg00021.html vendor advisory
http://www.debian.org/security/2014/dsa-3006 vendor advisory

Frequently Asked Questions

What is the severity of CVE-2013-2076?
CVE-2013-2076 has been scored as a medium severity vulnerability.
How to fix CVE-2013-2076?
To fix CVE-2013-2076, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2013-2076 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2013-2076 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
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