CVE-2015-1158

La función add_job en scheduler/ipp.c en cupsd en CUPS anterior a 2.0.3 realiza incorrectamente las operaciones libres para los atributos de los nombres de anfitriones que originan trabajos de múltiples valores, lo que permite a atacantes remotos provocar la corrupción de datos para las cadenas de referencias contadas a través de una solicitud (1) IPP_CREATE_JOB o (2) IPP_PRINT_JOB manipulada, tal y como fue demostrado mediante el remplazo del fichero de configuración y como consecuencia la ejecución de código arbitrario.

A string reference count bug was found in cupsd, causing premature freeing of string objects. An attacker could submit a malicious print job that exploits this flaw to dismantle ACLs protecting privileged operations, allowing a replacement configuration file to be uploaded, which in turn allowed the attacker to run arbitrary code on the CUPS server.

CUPS provides a portable printing layer for Linux, UNIX, and similar operating systems. A string reference count bug was found in cupsd, causing premature freeing of string objects. An attacker can submit a malicious print job that exploits this flaw to dismantle ACLs protecting privileged operations, allowing a replacement configuration file to be uploaded which in turn allows the attacker to run arbitrary code in the CUPS server A cross-site scripting flaw was found in the cups web templating engine. An attacker could use this flaw to bypass the default configuration settings that bind the CUPS scheduler to the 'localhost' or loopback interface.