Amazon Linux AMI Security Advisory: ALAS-2017-922
Advisory Release Date: 2017-11-20 21:37 Pacific
IMAP FETCH response out of bounds read:
A buffer overrun flaw was found in the IMAP handler of libcurl. By tricking an unsuspecting user into connecting to a malicious IMAP server, an attacker could exploit this flaw to potentially cause information disclosure or crash the application. (CVE-2017-1000257 )
Run yum update curl to update your system.