CVE-2018-16841

Severity CVSS v4.0:
Pending analysis
Type:
CWE-415 Double Free
Publication date:
28/11/2018
Last modified:
29/08/2022

Description

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.

Vulnerable products and versions

CPE From Up to
cpe:2.3:a:samba:samba:*:*:*:*:*:*:*:* 4.3.0 (including) 4.7.12 (excluding)
cpe:2.3:a:samba:samba:*:*:*:*:*:*:*:* 4.8.0 (including) 4.8.7 (excluding)
cpe:2.3:a:samba:samba:*:*:*:*:*:*:*:* 4.9.0 (including) 4.9.3 (excluding)
cpe:2.3:o:canonical:ubuntu_linux:12.04:*:*:*:esm:*:*:*
cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:*
cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:*
cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*
cpe:2.3:o:canonical:ubuntu_linux:18.10:*:*:*:*:*:*:*
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*