CVE-2023-3138

CVE Details

Release Date:

2023-06-15

Description

A vulnerability was found in libX11. The security flaw occurs because the functions in src/InitExt.c in libX11 do not check that the values provided for the Request, Event, or Error IDs are within the bounds of the arrays that those functions write to, using those IDs as array indexes. They trust that they were called with values provided by an Xserver adhering to the bounds specified in the X11 protocol, as all X servers provided by X.Org do. As the protocol only specifies a single byte for these values, an out-of-bounds value provided by a malicious server (or a malicious proxy-in-the-middle) can only overwrite other portions of the Display structure and not write outside the bounds of the Display structure itself, possibly causing the client to crash with this memory corruption.

See more information about CVE-2023-3138 from MITRE CVE dictionary and NIST NVD

CVSS v3.0 metrics

NOTE: The following CVSS v3.0 metrics and score provided are preliminary and subject to review.

Base Score:	7.3	Base Metrics:	AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:H/A:H
Access Vector:	Network	Attack Complexity:	Low
Privileges Required:	Low	User Interaction:	Required
Scope:	Unchanged	Confidentiality Impact:	None
Integrity Impact:	High	Availability Impact:	High

Errata information

Platform	Errata	Release Date
Oracle Linux version 8 (libX11)	ELSA-2023-7029	2023-11-17
Oracle Linux version 9 (libX11)	ELSA-2023-6497	2023-11-11

This page is generated automatically and has not been checked for errors or omissions. For clarification or corrections please contact the Oracle Linux ULN team