CVE-2018-8970

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.

• CWE-295

• https://boringssl.googlesource.com/boringssl/+/e759a9cd84198613199259dbed401f4951747cffThird Party Advisory
• https://ftp.openbsd.org/pub/OpenBSD/LibreSSL/libressl-2.7.1-relnotes.txtVendor Advisory
• https://github.com/libressl-portable/openbsd/commit/0654414afcce51a16d35d05060190a3ec4618d42Patch, Third Party Advisory
• https://boringssl.googlesource.com/boringssl/+/e759a9cd84198613199259dbed401f4951747cffThird Party Advisory
• https://ftp.openbsd.org/pub/OpenBSD/LibreSSL/libressl-2.7.1-relnotes.txtVendor Advisory
• https://github.com/libressl-portable/openbsd/commit/0654414afcce51a16d35d05060190a3ec4618d42Patch, Third Party Advisory

Published

Mar 24, 2018

Last Modified

Jun 17, 2026

Status

Modified

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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