OpenSSL.ChaCha20Poly1305.RC4MD5.Integer.Underflow

Description

This indicates an attack attempt against a Memory Corruption Vulnerability in OpenSSL.
The vulnerability is caused by an error when the vulnerable application handles a maliciously crafted TLS record. A remote attacker may be able to exploit this to cause a denial of service condition or execute arbitrary code on affected systems.

Affected Products

OpenSSL Project OpenSSL 1.0.x prior to 1.0.2k
OpenSSL Project OpenSSL 1.1.x prior to 1.1.0d

Impact

System Compromise: Remote attackers can gain control of vulnerable systems.

Recommended Actions

Apply the most recent upgrade or patch from the vendor.
http://www.openssl.org/news/secadv/20170126.txt

References