Linux Foundation Xen up to 4.3.0 XSAVE/XRSTOR information disclosure

CVSS Meta Temp Score
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CTI Interest Score
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3.6$0-$5k0.00

A vulnerability classified as problematic was found in Linux Foundation Xen up to 4.3.0 (Virtualization Software). This vulnerability affects the function XSAVE/XRSTOR. The manipulation 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 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.

The weakness was shared 09/25/2013 by Jan Beulich with SuSE as Information leak on AVX and/or LWP capable CPUs as confirmed mailinglist post (oss-sec). The advisory is shared for download at seclists.org. The vendor cooperated in the coordination of the public release. This vulnerability was named CVE-2013-1442 since 01/26/2013. The exploitation appears to be difficult. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. There are known technical details, but no exploit is available. The MITRE ATT&CK project declares the attack technique as T1592.

The vulnerability scanner Nessus provides a plugin with the ID 74865 (openSUSE Security Update : xen (openSUSE-SU-2013:1953-1)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family SuSE Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 166813 (SUSE Enterprise Linux Security Update for Xen (SUSE-SU-2014:0446-1)).

Upgrading to version 4.0.2, 4.0.3, 4.0.4 or 4.1.X eliminates this vulnerability. The upgrade is hosted for download at xenproject.org. A possible mitigation has been published immediately after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at X-Force (87460) and Tenable (74865). The entries 8812, 9254, 9273 and 10251 are related to this item.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB CVSS-B Score: 🔍
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CVSSv3info

VulDB Meta Base Score: 3.7
VulDB Meta Temp Score: 3.6

VulDB Base Score: 3.7
VulDB Temp Score: 3.6
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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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
ATT&CK: T1592

Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

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EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 74865
Nessus Name: openSUSE Security Update : xen (openSUSE-SU-2013:1953-1)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍
Nessus Port: 🔍

OpenVAS ID: 866962
OpenVAS Name: Fedora Update for xen FEDORA-2013-17689
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

Interest: 🔍
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Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
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Upgrade: Xen 4.0.2/4.0.3/4.0.4/4.1.X

Timelineinfo

01/26/2013 🔍
09/10/2013 +227 days 🔍
09/25/2013 +15 days 🔍
09/25/2013 +0 days 🔍
09/25/2013 +0 days 🔍
09/30/2013 +5 days 🔍
09/30/2013 +0 days 🔍
10/10/2013 +10 days 🔍
06/13/2014 +246 days 🔍
05/26/2021 +2539 days 🔍

Sourcesinfo

Vendor: linuxfoundation.org

Advisory: Information leak on AVX and/or LWP capable CPUs
Researcher: Jan Beulich
Organization: SuSE
Status: Confirmed
Coordinated: 🔍

CVE: CVE-2013-1442 (🔍)
OVAL: 🔍

X-Force: 87460
SecurityTracker: 1029090
Vulnerability Center: 41848 - XenSource Xen 4.0 Through 4.3 Local Information Disclosure Vulnerability Due to a Flaw In XSAVE And XRSTOR Components, Low
SecurityFocus: 62307 - Xen CVE-2013-4329 Local Privilege Escalation Vulnerability
OSVDB: 97770

See also: 🔍

Entryinfo

Created: 09/30/2013 18:34
Updated: 05/26/2021 02:41
Changes: 09/30/2013 18:34 (77), 06/25/2018 09:17 (9), 05/26/2021 02:41 (3)
Complete: 🔍

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