Out-of-bounds Read Affecting samba-winbind-32bit package, versions <4.9.5+git.432.d9b18c4f390-3.50.1
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Test your applications- Snyk ID SNYK-SLES151-SAMBAWINBIND32BIT-2681517
- published 14 Apr 2022
- disclosed 4 May 2021
Introduced: 4 May 2021
CVE-2021-20254 Open this link in a new tabHow to fix?
Upgrade SLES:15.1 samba-winbind-32bit to version 4.9.5+git.432.d9b18c4f390-3.50.1 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream samba-winbind-32bit package and not the samba-winbind-32bit package as distributed by SLES.
See How to fix? for SLES:15.1 relevant fixed versions and status.
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.
References
- https://www.suse.com/security/cve/CVE-2021-20254.html
- https://bugzilla.suse.com/1184677
- https://bugzilla.suse.com/1185886
- https://bugzilla.suse.com/1189860
- https://security.netapp.com/advisory/ntap-20210430-0001/
- https://www.samba.org/samba/security/CVE-2021-20254.html
- https://bugzilla.redhat.com/show_bug.cgi?id=1949442
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/3EP2VJ73OVBPVSOSTVOMGIEQA3MWF6F7/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/ZAF6L2M6CNAJ2YYYGXPWETTW5YLCWTVT/
- https://security.gentoo.org/glsa/202105-22
- https://lists.debian.org/debian-lts-announce/2021/05/msg00023.html
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/3EP2VJ73OVBPVSOSTVOMGIEQA3MWF6F7/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZAF6L2M6CNAJ2YYYGXPWETTW5YLCWTVT/