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.
History

No history.

cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published: 2023-02-14T17:35:08.172Z

Updated: 2024-08-02T11:25:19.176Z

Reserved: 2023-02-07T17:10:00.735Z

Link: CVE-2023-25563

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Analyzed

Published: 2023-02-14T18:15:13.077

Modified: 2023-02-22T18:37:29.103

Link: CVE-2023-25563

cve-icon Redhat

Severity : Moderate

Publid Date: 2023-02-14T00:00:00Z

Links: CVE-2023-25563 - Bugzilla