X.Org libX11 up to 1.8.5 InitExt.c buffer overflow

CVSS Meta Temp Score
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CTI Interest Score
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6.4$0-$5k0.00

Summaryinfo

A vulnerability was found in X.Org libX11 up to 1.8.5 and classified as critical. Affected by this vulnerability is an unknown functionality of the file InitExt.c. Such manipulation leads to buffer overflow. This vulnerability is traded as CVE-2023-3138. There is no exploit available. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability was found in X.Org libX11 up to 1.8.5. It has been rated as critical. Affected by this issue is an unknown code of the file InitExt.c. The manipulation with an unknown input leads to a buffer overflow vulnerability. Using CWE to declare the problem leads to CWE-120. The product copies an input buffer to an output buffer without verifying that the size of the input buffer is less than the size of the output buffer, leading to a buffer overflow. Impacted is confidentiality, integrity, and availability.

The weakness was shared 06/16/2023 by Gregory James Duck. The advisory is shared for download at seclists.org. This vulnerability is handled as CVE-2023-3138 since 06/07/2023. There are known technical details, but no exploit is available.

Upgrading to version 1.8.6 eliminates this vulnerability. Applying the patch 304a654a0d57bf0f00d8998185f0360332cfa36c 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 vulnerability database at EUVD (EUVD-2023-43823). VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

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Version

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Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.5
VulDB Meta Temp Score: 6.4

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

NVD Base Score: 7.5
NVD Vector: 🔍

CVSSv2info

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

Exploitinginfo

Class: Buffer overflow
CWE: CWE-120 / CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: libX11 1.8.6
Patch: 304a654a0d57bf0f00d8998185f0360332cfa36c

Timelineinfo

06/07/2023 🔍
06/15/2023 +8 days 🔍
06/16/2023 +0 days 🔍
01/26/2026 +955 days 🔍

Sourcesinfo

Vendor: x.org

Advisory: 304a654a0d57bf0f00d8998185f0360332cfa36c
Researcher: Gregory James Duck
Status: Confirmed

CVE: CVE-2023-3138 (🔍)
GCVE (CVE): GCVE-0-2023-3138
GCVE (VulDB): GCVE-100-231704
EUVD: 🔍

Entryinfo

Created: 06/16/2023 00:22
Updated: 01/26/2026 16:18
Changes: 06/16/2023 00:22 (42), 07/14/2023 09:16 (2), 07/14/2023 09:17 (11), 01/26/2026 16:18 (16)
Complete: 🔍
Cache ID: 216::103

VulDB is the best source for vulnerability data and more expert information about this specific topic.

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