CVE-2021-20254

Updated: 2023-03-10 12:28:07.061403

Description:

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.


Links NIST CIRCL RHEL Ubuntu

Severity

Severity Score
CVSS Version 2.x MEDIUM 4.9
CVSS Version 3.x MEDIUM 6.8

Status

OS name Project name Version Score Severity Status Errata Last updated
CentOS 6 ELS samba 3.6.23 6.8 MEDIUM Ignored 2021-11-20 06:42:49
CentOS 8.4 ELS samba 4.13.3-5 6.8 MEDIUM Not Vulnerable 2022-02-09 08:40:18
CentOS 8.5 ELS samba 4.14.5-7 6.8 MEDIUM Not Vulnerable 2022-02-09 08:40:18
CloudLinux 6 ELS samba 3.6.23 6.8 MEDIUM Ignored 2021-11-20 06:42:49
Oracle Linux 6 ELS samba 3.6.23 6.8 MEDIUM Ignored 2021-11-20 06:42:49
Ubuntu 16.04 ELS samba 4.3.11 6.8 MEDIUM Not Vulnerable 2021-12-22 03:55:05
Ubuntu 18.04 ELS samba 4.7.6 6.8 MEDIUM Ignored 2023-03-02 04:04:15