X.org X Server up to 21.1.13 Bitmap _XkbSetCompatMap sym_interpret heap-based overflow

CVSS Meta Temp Score
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CTI Interest Score
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8.1$0-$5k0.00

Summaryinfo

A vulnerability was found in X.org X Server up to 21.1.13. It has been classified as critical. The affected element is the function _XkbSetCompatMap of the component Bitmap Handler. The manipulation of the argument sym_interpret leads to heap-based overflow. This vulnerability is uniquely identified as CVE-2024-9632. The attack is possible to be carried out remotely. No exploit exists. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability was found in X.org X Server up to 21.1.13 and classified as critical. This issue affects the function _XkbSetCompatMap of the component Bitmap Handler. The manipulation of the argument sym_interpret 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 flaw was found in the X.org server. Due to improperly tracked allocation size in _XkbSetCompatMap, a local attacker may be able to trigger a buffer overflow condition via a specially crafted payload, leading to denial of service or local privilege escalation in distributions where the X.org server is run with root privileges.

The advisory is shared at seclists.org. The identification of this vulnerability is CVE-2024-9632 since 10/08/2024. The exploitation is known to be easy. The attack may be initiated remotely. Technical details are known, but no exploit is available.

The vulnerability scanner Nessus provides a plugin with the ID 209888 (Debian dsa-5800 : xnest - security update), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 21.1.14 eliminates this vulnerability. Applying the patch 85b776571487f52e756f68a069c768757369bfe3 is able to eliminate this problem. The bugfix is ready for download at gitlab.freedesktop.org. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the databases at Tenable (209888) and EUVD (EUVD-2024-50449). Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 8.3
VulDB Meta Temp Score: 8.1

VulDB Base Score: 8.8
VulDB Temp Score: 8.4
VulDB Vector: 🔍
VulDB Reliability: 🔍

CNA Base Score: 7.8
CNA Vector: 🔍

CVSSv2info

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

Exploitinginfo

Class: Heap-based overflow
CWE: CWE-122 / CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 209888
Nessus Name: Debian dsa-5800 : xnest - security update

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: X Server 21.1.14
Patch: 85b776571487f52e756f68a069c768757369bfe3

Timelineinfo

10/08/2024 🔍
10/30/2024 +22 days 🔍
10/30/2024 +0 days 🔍
07/05/2025 +248 days 🔍

Sourcesinfo

Vendor: x.org

Advisory: seclists.org
Status: Confirmed

CVE: CVE-2024-9632 (🔍)
GCVE (CVE): GCVE-0-2024-9632
GCVE (VulDB): GCVE-100-282497
EUVD: 🔍

Entryinfo

Created: 10/30/2024 07:22
Updated: 07/05/2025 05:07
Changes: 10/30/2024 07:22 (57), 10/30/2024 09:40 (2), 10/30/2024 13:56 (13), 07/05/2025 05:07 (1)
Complete: 🔍
Cache ID: 216::103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Discussion

 Anonymous User (+0)
2 years ago
Do you think it is appropriate to add the following cpe:"x.org:xorg-server" to the vulnerability?
 VulDB Community Team2 years ago
The official post at https://seclists.org/oss-sec/2024/q4/43 mentions "X Server" and recent CVEs enriched by NVD also tend to prefer "x.org:x_server" only. The NIST CPE Dictionary appears to be outdated and/or redundant.

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