Amazon Linux AMI Security Advisory: ALAS-2021-1500
Advisory Release Date: 2021-05-14 16:53 Pacific
Advisory Updated Date: 2021-05-19 17:35 Pacific
The package python/cpython is vulnerable to Web Cache Poisoning via urllib.parse.parse_qsl and urllib.parse.parse_qs by using a vector called parameter cloaking. When the attacker can separate query parameters using a semicolon (;), they can cause a difference in the interpretation of the request between the proxy (running with default configuration) and the server. This can result in malicious requests being cached as completely safe ones, as the proxy would usually not see the semicolon as a separator, and therefore would not include it in a cache key of an unkeyed parameter. (CVE-2021-23336)
No description is available for this CVE. (CVE-2021-3426)
Run yum update python36 to update your system.