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 hos...
HighCVSS 7.4
EPSS 1.0%
- Published
- Updated
- Exploit status
- No public exploit known
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 products
| Product | Affected versions | Fixed in |
|---|---|---|
| OpenBSD libressl | = 2.7.0 | No fix listed |
References
- boringssl.googlesource.com third-party-advisory
- ftp.openbsd.org vendor-advisory
- github.com patch third-party-advisory