X.org X11 Server up to 21.1.11 ProcAppleDRICreatePixmap heap-based overflow

Summaryinfo

A vulnerability has been found in X.org X11 Server up to 21.1.11 and classified as critical. This impacts the function ProcAppleDRICreatePixmap. The manipulation leads to heap-based overflow. This vulnerability is uniquely identified as CVE-2024-31082. Local access is required to approach this attack. No exploit exists. The affected component should be upgraded.

Detailsinfo

A vulnerability was found in X.org X11 Server up to 21.1.11 and classified as critical. This issue affects the function ProcAppleDRICreatePixmap. The manipulation with an unknown input leads to a heap-based overflow vulnerability. Using CWE to declare the problem leads to CWE-122. A heap overflow condition is a buffer overflow, where the buffer that can be overwritten is allocated in the heap portion of memory, generally meaning that the buffer was allocated using a routine such as malloc(). Impacted is confidentiality, integrity, and availability. The summary by CVE is:

A heap-based buffer over-read vulnerability was found in the X.org server's ProcAppleDRICreatePixmap() function. This issue occurs when byte-swapped length values are used in replies, potentially leading to memory leakage and segmentation faults, particularly when triggered by a client with a different endianness. This vulnerability could be exploited by an attacker to cause the X server to read heap memory values and then transmit them back to the client until encountering an unmapped page, resulting in a crash. Despite the attacker's inability to control the specific memory copied into the replies, the small length values typically stored in a 32-bit integer can result in significant attempted out-of-bounds reads.

It is possible to read the advisory at access.redhat.com. The identification of this vulnerability is CVE-2024-31082 since 03/28/2024. The exploitation is known to be easy. Attacking locally is a requirement. Technical details of the vulnerability are known, but there is no available exploit.

The vulnerability scanner Nessus provides a plugin with the ID 211569 (Oracle Linux 9 : xorg-x11-server (ELSA-2024-9122)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 21.1.12 eliminates this vulnerability.

The vulnerability is also documented in the databases at Tenable (211569) and EUVD (EUVD-2024-28993). Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Type

• Windowing System Software

Vendor

• X.org

Name

• X11 Server

Version

• 21.1.0
• 21.1.1
• 21.1.2
• 21.1.3
• 21.1.4
• 21.1.5
• 21.1.6
• 21.1.7
• 21.1.8
• 21.1.9
• 21.1.10
• 21.1.11

License

• open-source

Website

• Vendor: https://www.x.org/

CPE 2.3info

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Entryinfo

Be aware that VulDB is the high quality source for vulnerability data.

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