A flaw was found in samba. The Samba smbd file server must map Windows group identities (SIDs) into unix group ids (gids). The code that performs this had a flaw that could allow it to read data beyond the end of the array in the case where a negative cache entry had been added to the mapping cache. This could cause the calling code to return those values into the process token that stores the group membership for a user. The highest threat from this vulnerability is to data confidentiality and integrity.
History

No history.

cve-icon MITRE

Status: PUBLISHED

Assigner: redhat

Published: 2021-05-05T13:36:32

Updated: 2024-08-03T17:37:23.017Z

Reserved: 2020-12-17T00:00:00

Link: CVE-2021-20254

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Modified

Published: 2021-05-05T14:15:07.883

Modified: 2023-11-07T03:29:03.067

Link: CVE-2021-20254

cve-icon Redhat

Severity : Moderate

Publid Date: 2021-04-29T00:00:00Z

Links: CVE-2021-20254 - Bugzilla