CVE-2021-20254

描述

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.

如何修補 CVE-2021-20254

要修補 CVE-2021-20254,請將受影響套件升級到下列已修補版本。

• —升級至 4.12.15-r0 或更新版本

CVE-2021-20254 正在被利用嗎?

低 — EPSS 為 1.6%,目前沒有觀察到大規模利用活動。

受影響套件(1)

• >= 3.6.0, < 4.12.15-r0

CVSS 分數

參考連結(1)

• ADVISORYsecurity.alpinelinux.org/vuln/CVE-2021-20254