Amazon Linux 2 Security Advisory: ALAS-2018-998
Advisory Release Date: 2018-04-19 22:44 Pacific
Stack-based buffer overflow in relpTcpChkPeerName function in src/tcp.c:
rsyslog librelp version 1.2.14 and earlier contains a Buffer Overflow vulnerability in the checking of x509 certificates from a peer that can result in Remote code execution. This attack appear to be exploitable a remote attacker that can connect to rsyslog and trigger a stack buffer overflow by sending a specially crafted x509 certificate. (CVE-2018-1000140 )
Run yum update librelp to update your system.