UBUNTU-CVE-2026-119146: Buffer Overflow
ProFTPD before 1.3.9e and 1.3.10rc5 contains a buffer overflow vulnerability in the modrewrite int:utf8trans RewriteMap that allows remote attackers to overwrite static buffers. Attackers can send FTP command arguments longer than 1024 bytes, without authentication if pre-login commands are rewritten, to corrupt session memory and crash the session.
Affected Software
Event History
Frequently Asked Questions
Which deployments can be attacked without FTP authentication?
Unauthenticated exploitation is possible when pre-login FTP commands are subject to mod_rewrite rewriting. In that configuration, an attacker can send an oversized command argument before logging in.
What does an attacker need to send to trigger the issue?
The attacker needs to reach the FTP service and submit an FTP command argument longer than 1024 bytes that is processed by the mod_rewrite int:utf8trans RewriteMap. Exploitation is remote and requires no privileges or user interaction.
What is the expected impact of a successful attack?
Oversized rewritten arguments can overwrite static buffers, corrupt session memory, and crash the affected FTP session. The provided severity vector indicates potential low impact to confidentiality, integrity, and availability.