Description

A flaw was found in OpenSSL. A remote, unauthenticated attacker can cause a Denial of Service (DoS) by initiating concurrent connections to a multi-threaded Transport Layer Security (TLS) client or server verifying certificates. Due to improper synchronization when multiple threads simultaneously decode and cache certificate extensions for a shared Certificate Authority (CA) certificate, cached memory can be freed while still in use by another thread. This use-after-free condition results in an invalid memory read, causing the application to crash.

Mitigation

Aliases