CVE-2018-8970

Published: Mar 24, 2018Modified: Jun 17, 2026

7.4

Vector

CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N

Exploitability: 2.2 / Impact: 5.2

Source: NVD

Description

The int_x509_param_set_hosts function in lib/libcrypto/x509/x509_vpm.c in LibreSSL 2.7.0 before 2.7.1 does not support a certain special case of a zero name length, which causes silent omission of hostname verification, and consequently allows man-in-the-middle attackers to spoof servers and obtain sensitive information via a crafted certificate. NOTE: the LibreSSL documentation indicates that this special case is supported, but the BoringSSL documentation does not.

Affected (1)

Products: Openbsd: Libressl

1 product

Configuration A

1 vulnerable

Vulnerable Software	Affected Versions
Openbsd Libressl	Version 2.7.0

Related CWEs

Improper Certificate Validation

The product does not validate, or incorrectly validates, a certificate.

References (6)

https://boringssl.googlesource.com/boringssl/+/e759a9cd84198613199259dbed401f4951747cff

Source: cve@mitre.org

Third Party Advisory

https://ftp.openbsd.org/pub/OpenBSD/LibreSSL/libressl-2.7.1-relnotes.txt

Source: cve@mitre.org

Vendor Advisory

https://github.com/libressl-portable/openbsd/commit/0654414afcce51a16d35d05060190a3ec4618d42

Source: cve@mitre.org

PatchThird Party Advisory

https://boringssl.googlesource.com/boringssl/+/e759a9cd84198613199259dbed401f4951747cff

Source: af854a3a-2127-422b-91ae-364da2661108

Third Party Advisory

https://ftp.openbsd.org/pub/OpenBSD/LibreSSL/libressl-2.7.1-relnotes.txt

Source: af854a3a-2127-422b-91ae-364da2661108

Vendor Advisory

https://github.com/libressl-portable/openbsd/commit/0654414afcce51a16d35d05060190a3ec4618d42

Source: af854a3a-2127-422b-91ae-364da2661108

PatchThird Party Advisory

Timeline

No history available yet.