CVE-2021-3738

描述

In DCE/RPC it is possible to share the handles (cookies for resource state) between multiple connections via a mechanism called 'association groups'. These handles can reference connections to our sam.ldb database. However while the database was correctly shared, the user credentials state was only pointed at, and when one connection within that association group ended, the database would be left pointing at an invalid 'struct session_info'. The most likely outcome here is a crash, but it is possible that the use-after-free could instead allow different user state to be pointed at and this might allow more privileged access.

如何修補 CVE-2021-3738

要修補 CVE-2021-3738,請將受影響套件升級到下列已修補版本。

• —升級至 4.13.17-r0 或更新版本

CVE-2021-3738 正在被利用嗎?

低 — EPSS 為 1.9%,目前沒有觀察到大規模利用活動。

受影響套件(1)

• >= 4.0.0, < 4.13.17-r0

CVSS 分數

參考連結(1)

• ADVISORYsecurity.alpinelinux.org/vuln/CVE-2021-3738