Citrix Xen up to 4.1.0 HVM Controller memory corruption

CVSS Meta Temp Score
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CTI Interest Score
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4.8$0-$5k0.00

A vulnerability was found in Citrix Xen up to 4.1.0 (Connectivity Software). It has been classified as problematic. Affected is an unknown part of the component HVM Controller. The manipulation with an unknown input leads to a memory corruption vulnerability. CWE is classifying the issue as 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. This is going to have an impact on availability. CVE summarizes:

Stack-based buffer overflow in the dirty video RAM tracking functionality in Xen 3.4 through 4.1 allows local HVM guest OS administrators to cause a denial of service (crash) via a large bitmap image.

The weakness was published 12/03/2012 as msg00006 as confirmed posting (Website). The advisory is shared for download at lists.xen.org. The public release has been coordinated with the vendor. This vulnerability is traded as CVE-2012-5511 since 10/24/2012. The attack needs to be approached locally. A authentication is necessary for exploitation. There are neither technical details nor an exploit publicly available.

The vulnerability scanner Nessus provides a plugin with the ID 79492 (OracleVM 2.2 : xen (OVMSA-2012-0058)), 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 370048 (Citrix XenServer Security Update (CTX135777)).

Applying the patch xsa27-4.1.patch/xsa27-4.2.patch is able to eliminate this problem. The bugfix is ready for download at lists.xen.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 (80484) and Tenable (79492). Similar entries are available at 7081, 7082, 7083 and 7084.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB CVSS-B Score: 🔍
VulDB CVSS-BT Score: 🔍
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CVSSv3info

VulDB Meta Base Score: 5.5
VulDB Meta Temp Score: 4.8

VulDB Base Score: 5.5
VulDB Temp Score: 4.8
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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VulDB Base Score: 🔍
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Exploitinginfo

Class: Memory corruption
CWE: CWE-119
ATT&CK: Unknown

Local: Yes
Remote: No

Availability: 🔍
Status: Unproven

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 79492
Nessus Name: OracleVM 2.2 : xen (OVMSA-2012-0058)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Port: 🔍

OpenVAS ID: 892636
OpenVAS Name: Debian Security Advisory DSA 2636-2 (xen - several vulnerabilities
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: xsa27-4.1.patch/xsa27-4.2.patch

Timelineinfo

10/24/2012 🔍
12/03/2012 +40 days 🔍
12/03/2012 +0 days 🔍
12/03/2012 +0 days 🔍
12/04/2012 +1 days 🔍
12/04/2012 +0 days 🔍
12/05/2012 +1 days 🔍
12/07/2012 +2 days 🔍
12/13/2012 +6 days 🔍
04/24/2013 +132 days 🔍
11/26/2014 +581 days 🔍
04/19/2021 +2336 days 🔍

Sourcesinfo

Vendor: citrix.com

Advisory: msg00006
Status: Confirmed
Confirmation: 🔍
Coordinated: 🔍

CVE: CVE-2012-5511 (🔍)
OVAL: 🔍

X-Force: 80484 - Xen HVM denial of service, Medium Risk
Vulnerability Center: 39325 - Xen 3.4 - 4.1 Dirty Video RAM Tracking Functionality Stack-Based Buffer Overflow Allows Local DoS, Low
SecurityFocus: 56796 - Xen Bitmap Local Denial of Service Vulnerability
Secunia: 51397 - Xen Multiple Vulnerabilities, Less Critical
OSVDB: 88129

See also: 🔍

Entryinfo

Created: 12/07/2012 10:20
Updated: 04/19/2021 18:23
Changes: 12/07/2012 10:20 (88), 04/28/2017 09:13 (4), 04/19/2021 18:23 (3)
Complete: 🔍
Committer: olku

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