{"id":"AZL-43480","summary":"CVE-2023-25563 affecting package gssntlmssp 0.9.0-2","details":"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.","modified":"2026-04-01T05:15:08.869617Z","published":"2023-02-14T18:15:13Z","upstream":["CVE-2023-25563"],"references":[{"type":"WEB","url":"https://nvd.nist.gov/vuln/detail/CVE-2023-25563"}],"affected":[{"package":{"name":"gssntlmssp","ecosystem":"Azure Linux:2","purl":"pkg:rpm/azure-linux/gssntlmssp"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"last_affected":"0.9.0-2"}]}],"database_specific":{"source":"https://github.com/microsoft/AzureLinuxVulnerabilityData/blob/main/osv/AZL-43480.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"}]}