Linux Foundation Xen up to 4.2.2 XSAVE/XRSTOR FOP/FIP/FDP x87 Registers information disclosure

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CTI Interest Score
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3.2$0-$5k0.00

Summaryinfo

A vulnerability was found in Linux Foundation Xen up to 4.2.2. It has been declared as problematic. The affected element is the function XSAVE/XRSTOR. Executing a manipulation of the argument FOP/FIP/FDP x87 Registers can lead to information disclosure. This vulnerability appears as CVE-2013-2076. There is no available exploit. A patch should be applied to remediate this issue.

Detailsinfo

A vulnerability classified as problematic was found in Linux Foundation Xen up to 4.2.2 (Virtualization Software). This vulnerability affects the function XSAVE/XRSTOR. The manipulation of the argument FOP/FIP/FDP x87 Registers with an unknown input leads to a information disclosure vulnerability. The CWE definition for the vulnerability is CWE-200. The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information. As an impact it is known to affect confidentiality. CVE summarizes:

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.

The weakness was presented 06/03/2013 with Xen.org Security Team as not defined mailinglist post (oss-sec). The advisory is available at seclists.org. This vulnerability was named CVE-2013-2076 since 02/19/2013. Local access is required to approach this attack. Required for exploitation is a single authentication. Technical details are known, but there is no available exploit. This vulnerability is assigned to T1592 by the MITRE ATT&CK project.

The vulnerability scanner Nessus provides a plugin with the ID 69297 (SuSE 11.3 Security Update : Xen (SAT Patch Number 8063)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family SuSE Local Security Checks. The commercial vulnerability scanner Qualys is able to test this issue with plugin 166413 (OpenSuSE Security Update for XEN (openSUSE-SU-2013:1392-1)).

Applying a patch is able to eliminate this problem. A possible mitigation has been published immediately after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at X-Force (84705), Tenable (69297), SecurityFocus (BID 60277†), OSVDB (93820†) and Secunia (SA53591†). See VDB-8939, VDB-8940 and VDB-9273 for similar entries. If you want to get best quality of vulnerability data, you may have to visit VulDB.

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 3.3
VulDB Meta Temp Score: 3.2

VulDB Base Score: 3.3
VulDB Temp Score: 3.2
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
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Exploitinginfo

Class: Information disclosure
CWE: CWE-200 / CWE-284 / CWE-266
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: Partially

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 69297
Nessus Name: SuSE 11.3 Security Update : Xen (SAT Patch Number 8063)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Port: 🔍

OpenVAS ID: 865902
OpenVAS Name: Fedora Update for xen FEDORA-2013-10136
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

Interest: 🔍
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Countermeasuresinfo

Recommended: Patch
Status: 🔍

Reaction Time: 🔍
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Timelineinfo

02/19/2013 🔍
06/03/2013 +104 days 🔍
06/03/2013 +0 days 🔍
06/03/2013 +0 days 🔍
06/04/2013 +1 days 🔍
06/05/2013 +1 days 🔍
08/10/2013 +66 days 🔍
08/28/2013 +18 days 🔍
10/07/2013 +40 days 🔍
05/14/2021 +2776 days 🔍

Sourcesinfo

Vendor: linuxfoundation.org

Advisory: seclists.org
Organization: Xen.org Security Team
Status: Not defined

CVE: CVE-2013-2076 (🔍)
GCVE (CVE): GCVE-0-2013-2076
GCVE (VulDB): GCVE-100-8938

OVAL: 🔍

X-Force: 84705
SecurityFocus: 60277
Secunia: 53591 - Xen XSAVE Support Information Disclosure and Denial of Service Vulnerabilities, Not Critical
OSVDB: 93820
Vulnerability Center: 41789 - XenSource Xen 4.0 Through 4.2.2 Local Leakage of Information (CVE-2013-2076), Low

See also: 🔍

Entryinfo

Created: 06/05/2013 11:07
Updated: 05/14/2021 09:21
Changes: 06/05/2013 11:07 (78), 05/12/2017 21:36 (2), 05/14/2021 09:21 (3)
Complete: 🔍
Committer:
Cache ID: 216:471:103

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