Linux Foundation Xen up to 4.2.2 Xenstore Keys libxenlight access control

CVSS Meta Temp Score
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CTI Interest Score
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4.6$0-$5k0.00

Summaryinfo

A vulnerability classified as problematic was found in Linux Foundation Xen up to 4.2.2. This vulnerability affects unknown code in the library libxenlight of the component Xenstore Keys. Such manipulation leads to access control. This vulnerability is traded as CVE-2013-2211. Furthermore, there is an exploit available. It is best practice to apply a patch to resolve this issue.

Detailsinfo

A vulnerability, which was classified as problematic, has been found in Linux Foundation Xen up to 4.2.2 (Virtualization Software). Affected by this issue is an unknown function in the library libxenlight of the component Xenstore Keys. The manipulation with an unknown input leads to a access control vulnerability. Using CWE to declare the problem leads to CWE-264. Impacted is confidentiality, and integrity. CVE summarizes:

The libxenlight (libxl) toolstack library in Xen 4.0.x, 4.1.x, and 4.2.x uses weak permissions for xenstore keys for paravirtualised and emulated serial console devices, which allows local guest administrators to modify the xenstore value via unspecified vectors.

The weakness was shared 06/21/2013 as not defined mailinglist post (oss-sec). The advisory is available at seclists.org. This vulnerability is handled as CVE-2013-2211 since 02/19/2013. Local access is required to approach this attack. No form of authentication is required for exploitation. Technical details as well as a public exploit are known. This vulnerability is assigned to T1068 by the MITRE ATT&CK project.

It is declared as proof-of-concept. The vulnerability scanner Nessus provides a plugin with the ID 67322 (Fedora 18 : xen-4.2.2-9.fc18 (2013-11768)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Fedora Local Security Checks. 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)).

Applying a patch is able to eliminate this problem. The bugfix is ready for download at seclists.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 (85154), Tenable (67322), SecurityFocus (BID 60721†), OSVDB (94464†) and Secunia (SA53900†). The entries VDB-8812, VDB-9273, VDB-10251 and VDB-10504 are related to this item. 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: 5.1
VulDB Meta Temp Score: 4.6

VulDB Base Score: 5.1
VulDB Temp Score: 4.6
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

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Exploitinginfo

Class: Access control
CWE: CWE-264
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: Partially

Availability: 🔍
Access: Public
Status: Proof-of-Concept

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 67322
Nessus Name: Fedora 18 : xen-4.2.2-9.fc18 (2013-11768)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Port: 🔍

OpenVAS ID: 866048
OpenVAS Name: Fedora Update for xen FEDORA-2013-11768
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

Interest: 🔍
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Countermeasuresinfo

Recommended: Patch
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍

Patch: seclists.org

Timelineinfo

02/19/2013 🔍
06/21/2013 +122 days 🔍
06/21/2013 +0 days 🔍
06/21/2013 +0 days 🔍
06/21/2013 +0 days 🔍
06/25/2013 +4 days 🔍
07/12/2013 +17 days 🔍
07/14/2013 +2 days 🔍
08/28/2013 +45 days 🔍
05/17/2021 +2819 days 🔍

Sourcesinfo

Vendor: linuxfoundation.org

Advisory: seclists.org
Status: Not defined

CVE: CVE-2013-2211 (🔍)
GCVE (CVE): GCVE-0-2013-2211
GCVE (VulDB): GCVE-100-9254

OVAL: 🔍

X-Force: 85154
SecurityFocus: 60721 - libxenlight (libxl) Library For Xen Local Security Bypass Vulnerability
Secunia: 53900 - Xen libxenlight XenStore Keys Insecure Permissions Security Issue, Less Critical
OSVDB: 94464
Vulnerability Center: 40500 - Xen 4.2 and Earlier Security Bypass by a Local Attacker due to Insecure Permissions for Xenstore Keys, Medium

See also: 🔍

Entryinfo

Created: 06/25/2013 12:17
Updated: 05/17/2021 10:55
Changes: 06/25/2013 12:17 (80), 05/05/2017 10:35 (3), 05/17/2021 10:55 (3)
Complete: 🔍
Committer:
Cache ID: 216:CF3:103

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