CVE-2024-34055

Cyrus IMAP anterior a 3.8.3 y 3.10.x anterior a 3.10.0-rc1 permite a atacantes autenticados provocar una asignación de memoria ilimitada enviando muchos LITERAL en un solo comando.

A flaw was found in Cyrus IMAP before versions 3.8.3 and 3.10.x , and before 3.10.0-rc1. This flaw allows authenticated attackers to cause unbounded memory allocation by sending multiple LITERALs in a single command.

It was discovered that non-authentication-related HTTP requests could be interpreted in an authentication context by a Cyrus IMAP Server when multiple requests arrived over the same connection. An unauthenticated attacker could possibly use this issue to perform a privilege escalation attack. This issue only affected Ubuntu 18.04 LTS. Matthew Horsfall discovered that Cyrus IMAP Server utilized a poor string hashing algorithm that could be abused to control where data was being stored. An attacker could possibly use this issue to perform a denial of service. This issue only affected Ubuntu 18.04 LTS and Ubuntu 20.04 LTS.