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Published: 24/03/2018 Updated: 24/04/2018

CVSS v2 Base Score: 5.8 | Impact Score: 4.9 | Exploitability Score: 8.6

CVSS v3 Base Score: 7.4 | Impact Score: 5.2 | Exploitability Score: 2.2

VMScore: 516

Vector: AV:N/AC:M/Au:N/C:P/I:P/A:N

The int_x509_param_set_hosts function in lib/libcrypto/x509/x509_vpm.c in LibreSSL 2.7.0 prior to 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 malicious users 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.

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openbsd libressl 2.7.0

Demo for https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-8970

Demo for CVE-2018-8970 cvemitreorg/cgi-bin/cvenamecgi?name=CVE-2018-8970

CWE-295 https://github.com/libressl-portable/openbsd/commit/0654414afcce51a16d35d05060190a3ec4618d42 https://ftp.openbsd.org/pub/OpenBSD/LibreSSL/libressl-2.7.1-relnotes.txt https://boringssl.googlesource.com/boringssl/+/e759a9cd84198613199259dbed401f4951747cff https://nvd.nist.gov https://github.com/tiran/CVE-2018-8970

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CVE-2018-8970

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