CVE-2018-8970 Security feature bypass in n/a
Man-in-the-middle attackers can bypass hostname verification in LibreSSL to spoof servers and obtain sensitive information via crafted certificates.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2018-8970?
CVE-2018-8970 is a high-severity vulnerability in n/a, published on 24 Mar 2018. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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.
Weakness: CWE-295
Which versions are affected by CVE-2018-8970?
It affects 1 product.
Products include Openbsd Libressl.
How do I fix CVE-2018-8970?
Upgrade to a fixed version.
Is CVE-2018-8970 being exploited?
There is no known exploitation of CVE-2018-8970 in the wild and no public exploit code.
Public exploit code: 1 proofs of concept on GitHub.
Other vulnerabilities in n/a
Sources
Also known as GHSA-7gr4-mrjx-cjx9.