CVE-2021-20254
- Source
- https://cve.org/CVERecord?id=CVE-2021-20254
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-20254.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2021-20254
- Downstream
ALPINE (1)
ALSA (1)
CLEANSTART (1)
DEBIAN (1)
ECHO (1)
MGASA (1)
OESA (1)
RLSA (1)
SUSE (11)
- Related
- Published
- 2021-05-05T14:15:07Z
- Modified
- 2026-10-24T10:30:34Z
- 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.
- Database specific
{ "unresolved_ranges": [ { "cpes": [ "cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*" ], "extracted_events": [ { "range": [ { "introduced": "9.0" }, { "last_affected": "9.0" } ], "source": "CPE_STRING" } ], "vendor_product": "debian:debian_linux" }, { "cpes": [ "cpe:2.3:o:fedoraproject:fedora:32:*:*:*:*:*:*:*", "cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*" ], "extracted_events": [ { "range": [ { "introduced": "32" }, { "last_affected": "32" }, { "introduced": "33" }, { "last_affected": "33" } ], "source": "CPE_STRING" } ], "vendor_product": "fedoraproject:fedora" }, { "cpes": [ "cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:*", "cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:*" ], "extracted_events": [ { "range": [ { "introduced": "7.0" }, { "last_affected": "7.0" }, { "introduced": "8.0" }, { "last_affected": "8.0" } ], "source": "CPE_STRING" } ], "vendor_product": "redhat:enterprise_linux" } ] }- References
-
- 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/
- https://lists.debian.org/debian-lts-announce/2021/05/msg00023.html
- https://security.gentoo.org/glsa/202105-22
- 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
Affected packages
Git / github.com/samba-team/samba
Affected ranges
- Type
- GIT
- Repo
- https://github.com/samba-team/samba
- Events
- Database specific
-
Show details
{ "extracted_events": [ { "cpe": "cpe:2.3:a:samba:samba:*:*:*:*:*:*:*:*", "range": [ { "introduced": "3.6.0" }, { "fixed": "4.12.15" } ], "source": "CPE_RANGE" }, { "cpe": "cpe:2.3:a:samba:samba:*:*:*:*:*:*:*:*", "range": [ { "introduced": "4.13.0" }, { "fixed": "4.13.8" } ], "source": "CPE_RANGE" }, { "cpe": "cpe:2.3:a:samba:samba:*:*:*:*:*:*:*:*", "range": [ { "introduced": "4.14.0" }, { "fixed": "4.14.4" } ], "source": "CPE_RANGE" } ] }