Dovecot < 2.2.36.4 and < 2.3.7.2 Heap Overflow Vulnerability

Dovecot is prone to an unauthenticated heap out of bounds heap memory write vulnerability.

This vulnerability allows for out-of-bounds writes to objects stored on the heap up to 8096 bytes in pre-login phase, and 65536 bytes post-login phase, allowing sufficiently skilled attacker to perform complicated attacks that can lead to leaking private information or remote code execution. Abuse of this bug is very difficult to observe, as it does not necessarily cause a crash. Attempts to abuse this bug are not directly evident from logs.

Dovecot prior to version 2.2.36.4 and 2.3.x prior to version 2.3.7.2.

Checks if a vulnerable version is present on the target host.

Update to version 2.2.36.4, 2.3.7.2 or later.