nss: CHACHA20-POLY1305 decryption with undersized tag leads to out-of-bounds read

A flaw was found in the way CHACHA20-POLY1305 was implemented in NSS. When using multi-part Chacha20, it could cause out-of-bounds reads. This issue was fixed by explicitly disabling multi-part ChaCha20 which was not functioning correctly and strictly enforcing tag length. The highest threat from...