VDB-188676 · CVE-2021-4009 · dsa-5027

X.org X11 up to 12.0.13/21.1.1 SProcXFixesCreatePointerBarrier 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.
6.5	$0-$5k	0.00

Summaryinfo

A vulnerability described as critical has been identified in X.org X11 up to 12.0.13/21.1.1. This issue affects the function SProcXFixesCreatePointerBarrier. The manipulation results in memory corruption. This vulnerability is identified as CVE-2021-4009. There is not any exploit available. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability classified as critical has been found in X.org X11 up to 12.0.13/21.1.1 (Windowing System Software). Affected is the function SProcXFixesCreatePointerBarrier. 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 confidentiality, integrity, and availability.

The weakness was released 12/17/2021. The advisory is shared for download at lists.x.org. This vulnerability is traded as CVE-2021-4009 since 11/23/2021. There are known technical details, but no exploit is available.

Upgrading to version 12.0.14 or 21.1.2 eliminates this vulnerability.

Once again VulDB remains the best source for vulnerability data.

Productinfo

Type

Windowing System Software

Vendor

X.org

Name

Version

License

open-source

Website

Vendor: https://www.x.org/

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.6
VulDB Meta Temp Score: 6.5

VulDB Base Score: 5.5
VulDB Temp Score: 5.3
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.8
NVD Vector: 🔍

CVSSv2info

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💳	💳	💳	💳	💳	💳
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Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
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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-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: X11 12.0.14/21.1.2

Timelineinfo

11/23/2021 🔍
12/17/2021 +24 days 🔍
12/17/2021 +0 days 🔍
12/24/2021 +7 days 🔍

Sourcesinfo

Vendor: x.org

Advisory: dsa-5027
Status: Confirmed

CVE: CVE-2021-4009 (🔍)
GCVE (CVE): GCVE-0-2021-4009
GCVE (VulDB): GCVE-100-188676

Entryinfo

Created: 12/17/2021 22:21
Updated: 12/24/2021 09:35
Changes: 12/17/2021 22:21 (39), 12/17/2021 22:22 (1), 12/24/2021 09:32 (2), 12/24/2021 09:35 (19)
Complete: 🔍
Cache ID: 216::103