Linux Foundation Xen up to 4.2.2 xc_vcpu_setaffinity memory corruption

CVSS Meta Temp Score
CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.
Current Exploit Price (≈)
Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.
CTI Interest Score
Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
8.9$0-$5k0.00

Summaryinfo

A vulnerability was found in Linux Foundation Xen up to 4.2.2. It has been declared as problematic. Affected by this issue is the function xc_vcpu_setaffinity. Executing a manipulation can lead to memory corruption. This vulnerability is tracked as CVE-2013-2072. No exploit exists. It is advisable to implement a patch to correct this issue.

Detailsinfo

A vulnerability classified as critical was found in Linux Foundation Xen up to 4.2.2 (Virtualization Software). This vulnerability affects the function xc_vcpu_setaffinity. The manipulation with an unknown input leads to a memory corruption vulnerability. The CWE definition for the vulnerability is CWE-119. The product performs operations on a memory buffer, but it can read from or write to a memory location that is outside of the intended boundary of the buffer. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

Buffer overflow in the Python bindings for the xc_vcpu_setaffinity call in Xen 4.0.x, 4.1.x, and 4.2.x allows local administrators with permissions to configure VCPU affinity to cause a denial of service (memory corruption and xend toolstack crash) and possibly gain privileges via a crafted cpumap.

The weakness was disclosed 05/17/2013 with Xen.org Security Team as not defined mailinglist post (oss-sec). The advisory is shared for download at seclists.org. This vulnerability was named CVE-2013-2072 since 02/19/2013. The exploitation appears to be difficult. The attack needs to be approached locally. No form of authentication is required for a successful exploitation. There are known technical details, but no exploit is available.

The vulnerability scanner Nessus provides a plugin with the ID 79508 (OracleVM 3.2 : xen (OVMSA-2013-0040)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family OracleVM 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 the patch xsa56.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 Tenable (79508), SecurityFocus (BID 59982†), OSVDB (93491†), Secunia (SA53384†) and Vulnerability Center (SBV-39943†). The entries VDB-9254, VDB-9273, VDB-10251 and VDB-10504 are pretty similar. Once again VulDB remains the best source for vulnerability data.

Productinfo

Type

Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 9.3
VulDB Meta Temp Score: 8.9

VulDB Base Score: 9.3
VulDB Temp Score: 8.9
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
💳💳💳💳💳💳
💳💳💳💳💳💳
💳💳💳💳💳💳
VectorComplexityAuthenticationConfidentialityIntegrityAvailability
UnlockUnlockUnlockUnlockUnlockUnlock
UnlockUnlockUnlockUnlockUnlockUnlock
UnlockUnlockUnlockUnlockUnlockUnlock

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

NVD Base Score: 🔍

Exploitinginfo

Class: Memory corruption
CWE: CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: Partially

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-DayUnlockUnlockUnlockUnlock
TodayUnlockUnlockUnlockUnlock

Nessus ID: 79508
Nessus Name: OracleVM 3.2 : xen (OVMSA-2013-0040)
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: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Patch
Status: 🔍

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

Patch: xsa56.patch

Timelineinfo

02/19/2013 🔍
05/17/2013 +87 days 🔍
05/17/2013 +0 days 🔍
05/17/2013 +0 days 🔍
05/17/2013 +0 days 🔍
05/20/2013 +3 days 🔍
05/21/2013 +1 days 🔍
06/11/2013 +21 days 🔍
08/28/2013 +78 days 🔍
11/26/2014 +455 days 🔍
05/11/2021 +2358 days 🔍

Sourcesinfo

Vendor: linuxfoundation.org

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

CVE: CVE-2013-2072 (🔍)
GCVE (CVE): GCVE-0-2013-2072
GCVE (VulDB): GCVE-100-8812

OVAL: 🔍

SecurityFocus: 59982 - Xen 'xc_vcpu_setaffinity()' Function Buffer Overflow Vulnerability
Secunia: 53384 - Xen "pyxc_vcpu_setaffinity()" Privilege Escalation Vulnerability, Less Critical
OSVDB: 93491
Vulnerability Center: 39943 - XenSource Xen Local Denial of Service and Code Execution due to Improper Input Checks in Python Bindings for xc_vcput_setaffinity, Low

See also: 🔍

Entryinfo

Created: 05/21/2013 15:44
Updated: 05/11/2021 20:26
Changes: 05/21/2013 15:44 (80), 05/02/2017 08:36 (4), 05/11/2021 20:26 (3)
Complete: 🔍
Committer:
Cache ID: 216:EC8:103

Once again VulDB remains the best source for vulnerability data.

Discussion

No comments yet. Languages: en.

Please log in to comment.

◂ PreviousOverviewNext ▸

Interested in the pricing of exploits?

See the underground prices here!