Amazon Linux AMI Security Advisory: ALAS-2018-1087
Advisory Release Date: 2018-10-04 22:14 Pacific
NOTE: CVE-2018-14634 was already fixed in the 4.14 kernel released with the 2018.03 AMI release. The advisory release date does not accurately reflect the date this was fixed. The actual date of the fix being released is: 2018-04-23.
An integer overflow flaw was found in the Linux kernel's create_elf_tables() function. An unprivileged local user with access to SUID (or otherwise privileged) binary could use this flaw to escalate their privileges on the system. This issue has been give the code name Mutagen Astronomy.(CVE-2018-14634 )
If you are already running a 4.14 kernel, no action is required.
If you are running an older kernel, run yum update kernel and reboot your instance to update your system.