Home » News » OpenSSL Security Advisory Released

Dated: July 9, 2015

Description
OpenSSL has released updates that addresses a vulnerability impacting proper certificate verification. When exploited, this vulnerability can lead an attacker to 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.

Affected Versions
This issue will impact any application that verifies certificates including SSL/TLS/DTLS clients and SSL/TLS/DTLS servers using client authentication. This issue affects OpenSSL versions 1.0.2c, 1.0.2b, 1.0.1n and 1.0.1o.

Recommendations
–  OpenSSL 1.0.2b/1.0.2c users should upgrade to 1.0.2d
–  OpenSSL 1.0.1n/1.0.1o users should upgrade to 1.0.1p

Reference
[1]. https://www.openssl.org/news/secadv_20150709.txt