CVE-2021-20254
samba
MEDIUM 6.8
En bref
- Source
- NVD
- EPSS
- EPSS 1.62 % · centile 76 ()
- État
- PUBLISHED
- Publiée
- Mise à jour
- Attribuée par
- redhat
- Statut NVD
- Modified
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.
Faiblesses (CWE)
- CWE-125 — Lecture hors limites
Références
- https://bugzilla.redhat.com/show_bug.cgi?id=1949442
- https://www.samba.org/samba/security/CVE-2021-20254.html
- https://security.netapp.com/advisory/ntap-20210430-0001/
- 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://security.gentoo.org/glsa/202105-22
- https://lists.debian.org/debian-lts-announce/2021/05/msg00023.html
Scores
| Version | Score | Vecteur | Évalué par |
|---|---|---|---|
| CVSS 3.1 | MEDIUM 6.8 | CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N | NVD · nvd@nist.gov (Primary) |
| CVSS 2.0 | MEDIUM 4.9 | AV:N/AC:M/Au:S/C:P/I:P/A:N | NVD · nvd@nist.gov (Primary) |
Références européennes
- ENISA EUVD · EUVD-2021-7692
- GCVE · GCVE-0-2021-20254
Avis du CERT-FR
- CERTFR-2022-AVI-597 — Multiples vulnérabilités dans IBM Spectrum Protect Plus · cert.ssi.gouv.fr
- CERTFR-2021-AVI-465 — Vulnérabilité dans les produits Qnap · cert.ssi.gouv.fr
- CERTFR-2021-AVI-328 — Vulnérabilité dans Samba · cert.ssi.gouv.fr
Configurations affectées (CPE NVD)
cpe:2.3:a:samba:samba:*:*:*:*:*:*:*:*≥ 3.6.0 < 4.12.15cpe:2.3:a:samba:samba:*:*:*:*:*:*:*:*≥ 4.13.0 < 4.13.8cpe:2.3:a:samba:samba:*:*:*:*:*:*:*:*≥ 4.14.0 < 4.14.4cpe:2.3:o:fedoraproject:fedora:32:*:*:*:*:*:*:*cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:*cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:*cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
Produits affectés
| Produit | Versions |
|---|---|
| samba | affected samba 4.14.1, samba 4.13.6, samba 4.12.13 |
Sources
| Source | Licence |
|---|---|
| CVE List (CVEProject cvelistV5) | CVE Program Terms of Use |
| EPSS (FIRST.org) | FIRST — attribution requested |
| ENISA EUVD | ENISA — reproduction authorised, source acknowledged |
| CERT-FR (ANSSI) | Licence Ouverte / Etalab 2.0 |
| NVD (NIST) via fkie-cad/nvd-json-data-feeds | Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD |