SUSE: CVE-2023-25563: SUSE Linux Security Advisory

SUSE: CVE-2023-25563: SUSE Linux Security Advisory

Severity

8

CVSS

(AV:N/AC:L/Au:N/C:N/I:N/A:C)

Published

02/14/2023

Created

02/22/2023

Added

02/21/2023

Modified

01/28/2025

Description

GSS-NTLMSSP is a mechglue plugin for the GSSAPI library that implements NTLM authentication. Prior to version 1.2.0, multiple out-of-bounds reads when decoding NTLM fields can trigger a denial of service. A 32-bit integer overflow condition can lead to incorrect checks of consistency of length of internal buffers. Although most applications will error out before accepting a singe input buffer of 4GB in length this could theoretically happen. This vulnerability can be triggered via the main `gss_accept_sec_context` entry point if the application allows tokens greater than 4GB in length. This can lead to a large, up to 65KB, out-of-bounds read which could cause a denial-of-service if it reads from unmapped memory. Version 1.2.0 contains a patch for the out-of-bounds reads.

Solution(s)

• suse-upgrade-gssntlmssp
• suse-upgrade-gssntlmssp-devel

References

• https://attackerkb.com/topics/cve-2023-25563
• CVE - 2023-25563