CVE-2021-20254

Katalog CVE

CVSS 6.8 · Medium EPSS 1,6%

Kerentanan Out-of-bounds Read pada samba, fedoraproject fedora +2 lainnya. Skor CVSS 3.1 6.8 (Medium) menurut NVD.

Deskripsi (NVD)

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.

Rincian

Terbit di NVD

5 Mei 2021

Terakhir diubah

17 Juni 2026

Status NVD

Modified

CVSS 3.1

6.8 (Medium), sumber NVD
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N · uraikan di kalkulator

Jenis kelemahan (CWE)

CWE-125: Out-of-bounds Read

EPSS (30 hari)

1,6% peluang dieksploitasi; lebih tinggi dari 75,3% CVE lain

Produk dan versi terdampak

> Data dari konfigurasi CPE di NVD.

Referensi dan perbaikan

• https://www.samba.org/samba/security/CVE-2021-20254.html advisory vendor
• https://bugzilla.redhat.com/show_bug.cgi?id=1949442 issue tracking · advisory pihak ketiga
• https://lists.debian.org/debian-lts-announce/2021/05/msg00023.html mailing list · advisory pihak ketiga
• https://security.gentoo.org/glsa/202105-22 advisory pihak ketiga
• https://security.netapp.com/advisory/ntap-20210430-0001/ advisory pihak ketiga
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/3EP2VJ73OVBPV...
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZAF6L2M6CNAJ2...