Уязвимость клиентской библиотеки FTP (File Transfer Protocol) интерпретатора языка программирования Python, позволяющая нарушителю выполнять SSRF-атаки

Уязвимость класса AbstractBasicAuthHandler компонента urllib.request интерпретатора языка программирования Python, позволяющая нарушителю вызвать отказ в обслуживании

There's a flaw in urllib's AbstractBasicAuthHandler class. An attacker who controls a malicious HTTP server that an HTTP client (such as web browser) connects to, could trigger a Regular Expression Denial of Service (ReDOS) during an authentication request with a specially crafted payload that is sent by the server to the client. The greatest threat that this flaw poses is to application availability.

A flaw was found in Python, specifically in the FTP (File Transfer Protocol) client library in PASV (passive) mode. The issue is how the FTP client trusts the host from the PASV response by default. This flaw allows an attacker to set up a malicious FTP server that can trick FTP clients into connecting back to a given IP address and port. This vulnerability could lead to FTP client scanning ports, which otherwise would not have been possible.