CVE-2018-16841

描述

Samba from version 4.3.0 and before versions 4.7.12, 4.8.7 and 4.9.3 are vulnerable to a denial of service. When configured to accept smart-card authentication, Samba's KDC will call talloc_free() twice on the same memory if the principal in a validly signed certificate does not match the principal in the AS-REQ. This is only possible after authentication with a trusted certificate. talloc is robust against further corruption from a double-free with talloc_free() and directly calls abort(), terminating the KDC process.

如何修補 CVE-2018-16841

要修補 CVE-2018-16841,請將受影響套件升級到下列已修補版本。

• —升級至 4.8.7-r0 或更新版本

CVE-2018-16841 正在被利用嗎?

低 — EPSS 為 4.6%,目前沒有觀察到大規模利用活動。

受影響套件(1)

• >= 4.3.0, < 4.8.7-r0

CVSS 分數

參考連結(1)

• ADVISORYsecurity.alpinelinux.org/vuln/CVE-2018-16841