DEBIAN-CVE-2021-20254
- Source
- https://security-tracker.debian.org/tracker/CVE-2021-20254
- Import Source
- https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2021-20254.json
- JSON Data
- https://api.test.osv.dev/v1/vulns/DEBIAN-CVE-2021-20254
- Upstream
- Published
- 2021-05-05T14:15:07Z
- Modified
- 2025-09-25T22:40:41Z
- Severity
-
- 6.8 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N CVSS Calculator
- Summary
- [none]
- Details
-
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
Affected packages
Debian:11 / samba
Package
- Name
- samba
- Purl
- pkg:deb/debian/samba?arch=source
Debian:12 / samba
Package
- Name
- samba
- Purl
- pkg:deb/debian/samba?arch=source
Debian:13 / samba
Package
- Name
- samba
- Purl
- pkg:deb/debian/samba?arch=source
Debian:14 / samba
Package
- Name
- samba
- Purl
- pkg:deb/debian/samba?arch=source