CVE-2007-3278

PostgreSQL 8.1 y probablemente versiones posteriores, cuando la autenticación de confianza local está habilitada y la librería de enlace a base de datos (Database Link Library (dblink) está instalada, permite a atacantes remotos acceder a cuentas de su elección y ejecutar peticiones SQL mediante un parámetro host de dblink que hace de proxy de la conexión desde 127.0.0.1.

PostgreSQL 8.1 and probably later and earlier versions, when local trust authentication is enabled and the Database Link library (dblink) is installed, allows remote attackers to access arbitrary accounts and execute arbitrary SQL queries via a dblink host parameter that proxies the connection from 127.0.0.1. PostgreSQL 8.1 and probably later and earlier versions, when the PL/pgSQL (plpgsql) language has been created, grants certain plpgsql privileges to the PUBLIC domain, which allows remote attackers to create and execute functions, as demonstrated by functions that perform local brute-force password guessing attacks, which may evade intrusion detection. The Database Link library (dblink) in PostgreSQL 8.1 implements functions via CREATE statements that map to arbitrary libraries based on the C programming language, which allows remote authenticated superusers to map and execute a function from any library, as demonstrated by using the system function in libc.so.6 to gain shell access.