OpenSSL v1.0.2.c Release Notes
Release Date: 2015-07-09 // almost 9 years ago-
- Alternate chains certificate forgery
During certificate verification, OpenSSL will attempt to find an alternative certificate chain if the first attempt to build such a chain fails. An error in the implementation of this logic can mean that an attacker could cause certain checks on untrusted certificates to be bypassed, such as the CA flag, enabling them to use a valid leaf certificate to act as a CA and "issue" an invalid certificate.
This issue was reported to OpenSSL by Adam Langley/David Benjamin (Google/BoringSSL).
Matt Caswell