X.org X11 6.7.0/6.8/6.8.1/6.9 Xrender Extension memory corruption

CVSS Meta Temp Score
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CTI Interest Score
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6.6$0-$5k0.00

Summaryinfo

A vulnerability labeled as critical has been found in X.org X11 6.7.0/6.8/6.8.1/6.9. Impacted is an unknown function of the component Xrender Extension. Executing a manipulation can lead to memory corruption. The identification of this vulnerability is CVE-2006-1526. There is no exploit available. A patch should be applied to remediate this issue.

Detailsinfo

A vulnerability was found in X.org X11 6.7.0/6.8/6.8.1/6.9 (Windowing System Software). It has been declared as critical. This vulnerability affects an unknown part of the component Xrender Extension. 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 X render (Xrender) extension in X.org X server 6.8.0 up to allows attackers to cause a denial of service (crash), as demonstrated by the (1) XRenderCompositeTriStrip and (2) XRenderCompositeTriFan requests in the rendertest from XCB xcb/xcb-demo, which leads to an incorrect memory allocation due to a typo in an expression that uses a "&" instead of a "*" operator. NOTE: the subject line of the original announcement used an incorrect CVE number for this issue.

The bug was discovered 05/02/2006. The weakness was shared 05/03/2006 with X11 Team (Website). The advisory is available at lists.freedesktop.org. This vulnerability was named CVE-2006-1526 since 03/30/2006. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. The technical details are unknown and an exploit is not available.

It is declared as proof-of-concept. As 0-day the estimated underground price was around $25k-$100k. The vulnerability scanner Nessus provides a plugin with the ID 21996 (CentOS 4 : xorg-x11 (CESA-2006:0451)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family CentOS Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 117711 (CentOS Security Update for X.org (CESA-2006:0451)).

Applying a patch is able to eliminate this problem. The bugfix is ready for download at xorg.freedesktop.org. A possible mitigation has been published even before and not after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at X-Force (26200), Tenable (21996), SecurityFocus (BID 17795†), OSVDB (25191†) and Secunia (SA19983†). If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.3
VulDB Meta Temp Score: 6.6

VulDB Base Score: 7.3
VulDB Temp Score: 6.6
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VulDB Base Score: 🔍
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Exploitinginfo

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

Physical: Partially
Local: Yes
Remote: Yes

Availability: 🔍
Status: Proof-of-Concept

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 21996
Nessus Name: CentOS 4 : xorg-x11 (CESA-2006:0451)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍
Nessus Port: 🔍

OpenVAS ID: 56691
OpenVAS Name: Slackware Advisory SSA:2006-123-01 xorg server overflow
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

Interest: 🔍
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Countermeasuresinfo

Recommended: Patch
Status: 🔍

0-Day Time: 🔍

Patch: xorg.freedesktop.org

Timelineinfo

03/30/2006 🔍
05/02/2006 +33 days 🔍
05/02/2006 +0 days 🔍
05/02/2006 +0 days 🔍
05/02/2006 +0 days 🔍
05/02/2006 +0 days 🔍
05/03/2006 +1 days 🔍
05/03/2006 +0 days 🔍
05/03/2006 +0 days 🔍
05/05/2006 +1 days 🔍
05/05/2006 +0 days 🔍
05/10/2006 +5 days 🔍
07/05/2006 +56 days 🔍
06/22/2025 +6927 days 🔍

Sourcesinfo

Vendor: x.org

Advisory: lists.freedesktop.org
Researcher: http://xorg.freedesktop.org
Organization: X11 Team
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2006-1526 (🔍)
GCVE (CVE): GCVE-0-2006-1526
GCVE (VulDB): GCVE-100-2194

OVAL: 🔍

CERT: 🔍
X-Force: 26200 - X.Org Xrender extension buffer overflow, High Risk
SecurityFocus: 17795 - X.Org XRender Extension Buffer Overflow Vulnerability
Secunia: 19983 - Sun Solaris update for Xorg X Server, Moderately Critical
OSVDB: 25191 - X.Org / X11 Render Extension Authenticated Remote Overflow
SecurityTracker: 1016018
Vulnerability Center: 11381 - X.org Arbitrary Code Execution via Buffer Overflow in Xrender, High
Vupen: ADV-2006-1617

Entryinfo

Created: 05/05/2006 17:21
Updated: 06/22/2025 05:55
Changes: 05/05/2006 17:21 (98), 06/17/2019 16:31 (2), 01/20/2025 06:47 (17), 06/22/2025 05:55 (2)
Complete: 🔍
Cache ID: 216:C41:103

If you want to get best quality of vulnerability data, you may have to visit VulDB.

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