Amazon Linux AMI Security Advisory: ALAS-2021-1494
Advisory Release Date: 2021-04-19 17:26 Pacific
Advisory Updated Date: 2021-04-21 17:50 Pacific
A flaw was found in Samba's libldb. Multiple, consecutive leading spaces in an LDAP attribute can lead to an out-of-bounds memory write, leading to a crash of the LDAP server process handling the request. The highest threat from this vulnerability is to system availability. (CVE-2021-20277)
Run yum update libldb to update your system.