VDB-241287 · CVE-2023-43785 · Nessus 235594

X.org libX11 XKBGetMap.c _XkbReadKeySyms out-of-bounds

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.
5.1	$0-$5k	0.00

Summaryinfo

A vulnerability marked as problematic has been reported in X.org libX11. This affects the function _XkbReadKeySyms of the file XKBGetMap.c. Performing a manipulation results in out-of-bounds. This vulnerability is reported as CVE-2023-43785. No exploit exists. It is recommended to apply a patch to fix this issue.

Detailsinfo

A vulnerability was found in X.org libX11 (the affected version is unknown). It has been classified as problematic. This affects the function _XkbReadKeySyms of the file XKBGetMap.c. The manipulation with an unknown input leads to a out-of-bounds vulnerability. CWE is classifying the issue as CWE-125. The product reads data past the end, or before the beginning, of the intended buffer. This is going to have an impact on confidentiality.

The weakness was disclosed 10/04/2023. It is possible to read the advisory at cgit.freedesktop.org. This vulnerability is uniquely identified as CVE-2023-43785 since 09/22/2023. Technical details of the vulnerability are known, but there is no available exploit.

The vulnerability scanner Nessus provides a plugin with the ID 235594 (RockyLinux 9 : libX11 (RLSA-2024:2145)), which helps to determine the existence of the flaw in a target environment.

Applying a patch is able to eliminate this problem. The bugfix is ready for download at cgit.freedesktop.org. The advisory contains the following remark:

CVE-2023-43785: out-of-bounds memory access in _XkbReadKeySyms()

The vulnerability is also documented in the vulnerability database at Tenable (235594). Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Vendor

X.org

Name

libX11

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: 5.2
VulDB Meta Temp Score: 5.1

VulDB Base Score: 3.5
VulDB Temp Score: 3.4
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 5.5
NVD Vector: 🔍

CNA Base Score: 6.5
CNA Vector (Red Hat, Inc.): 🔍

CVSSv2info

AV	AC	Au	C	I	A
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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: 🔍

Exploitinginfo

Class: Out-of-bounds
CWE: CWE-125 / CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Nessus ID: 235594
Nessus Name: RockyLinux 9 : libX11 (RLSA-2024:2145)

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Patch
Status: 🔍

0-Day Time: 🔍

Patch: cgit.freedesktop.org

Timelineinfo

09/22/2023 🔍
10/04/2023 +12 days 🔍
10/04/2023 +0 days 🔍
05/08/2025 +582 days 🔍

Sourcesinfo

Vendor: x.org

Advisory: cgit.freedesktop.org
Status: Confirmed

CVE: CVE-2023-43785 (🔍)
GCVE (CVE): GCVE-0-2023-43785
GCVE (VulDB): GCVE-100-241287

Entryinfo

Created: 10/04/2023 17:29
Updated: 05/08/2025 07:55
Changes: 10/04/2023 17:29 (40), 10/25/2023 15:11 (1), 10/25/2023 15:17 (21), 09/16/2024 17:44 (16), 05/08/2025 07:55 (2)
Complete: 🔍
Cache ID: 216::103