Amazon Linux 2 Security Advisory: ALAS-2020-1531
Advisory Release Date: 2020-10-22 18:19 Pacific
Advisory Updated Date: 2020-10-22 22:35 Pacific
In libssh2 v1.9.0 and earlier versions, the SSH_MSG_DISCONNECT logic in packet.c has an integer overflow in a bounds check, enabling an attacker to specify an arbitrary (out-of-bounds) offset for a subsequent memory read. A crafted SSH server may be able to disclose sensitive information or cause a denial of service condition on the client system when a user connects to the server. (CVE-2019-17498 )
Run yum update libssh2 to update your system.