CVE-2007-1558

CVE-2007-1558 describes a cryptographic weakness in APOP authentication that lowers MITM attack cost to recover passwords. Connected advisories show this affects multiple mail clients (e.g., Thunderbird/Icedove, Iceape, fetchmail) and related POP/ALOP implementations. Debian DSA-1305-1 and CentOS...

claws-mail -- APOP vulnerability

CVE reports: The APOP protocol allows remote attackers to guess the first 3 characters of a password via man-in-the-middle MITM attacks that use crafted message IDs and MD5 collisions...