CVEvulnerability
CVE-2018-8970
7.4 HIGH
Official page ↗
- Status
- Modified
- Published
- 2018-03-24
- Last modified
- 2026-06-17
- Assigner
- [email protected]
- CVSS 3.0 ([email protected])
- 7.4 HIGH — CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
- CVSS 2.0 ([email protected])
- 5.8 MEDIUM — AV:N/AC:M/Au:N/C:P/I:P/A:N
- Weaknesses
- CWE-295
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 configurations
• openbsd libressl 2.7.0
Related
Weakness · CWE (1)
- CWE-295 Improper Certificate Validation weakness
References
- https://boringssl.googlesource.com/boringssl/+/e759a9cd84198613199259dbed401f4951747cff Third Party Advisory
- https://ftp.openbsd.org/pub/OpenBSD/LibreSSL/libressl-2.7.1-relnotes.txt Vendor Advisory
- https://github.com/libressl-portable/openbsd/commit/0654414afcce51a16d35d05060190a3ec4618d42 Patch, Third Party Advisory
- https://boringssl.googlesource.com/boringssl/+/e759a9cd84198613199259dbed401f4951747cff Third Party Advisory
- https://ftp.openbsd.org/pub/OpenBSD/LibreSSL/libressl-2.7.1-relnotes.txt Vendor Advisory
- https://github.com/libressl-portable/openbsd/commit/0654414afcce51a16d35d05060190a3ec4618d42 Patch, Third Party Advisory