Amazon Linux AMI Security Advisory: ALAS-2021-1521
Advisory Release Date: 2021-07-08 18:38 Pacific
Advisory Updated Date: 2021-07-12 21:52 Pacific
A flaw was found in RPM's signature check functionality when reading a package file. This flaw allows an attacker who can convince a victim to install a seemingly verifiable package, whose signature header was modified, to cause RPM database corruption and execute code. The highest threat from this vulnerability is to data integrity, confidentiality, and system availability. (CVE-2021-20271)
A flaw was found in the RPM package in the read functionality. This flaw allows an attacker who can convince a victim to install a seemingly verifiable package or compromise an RPM repository, to cause RPM database corruption. The highest threat from this vulnerability is to data integrity. (CVE-2021-3421)
Run yum update rpm to update your system.