CVE-2015-3147

El archivo daemon/abrt-handle-upload.in en Automatic Bug Reporting Tool (ABRT), cuando mueve reportes de problemas desde /var/spool/abrt-upload, permite a usuarios locales escribir en archivos arbitrarios o posiblemente tener otro impacto no especificado por medio de un ataque de enlace simbólico en (1) /var/spool/abrt o (2) /var/tmp/abrt.

It was discovered that, when moving problem reports between certain directories, abrt-handle-upload did not verify that the new problem directory had appropriate permissions and did not contain symbolic links. An attacker able to create a crafted problem report could use this flaw to expose other parts of ABRT, or to overwrite arbitrary files on the system.

ABRT is a tool to help users to detect defects in applications and to create a bug report with all the information needed by a maintainer to fix it. It uses a plug-in system to extend its functionality. It was found that ABRT was vulnerable to multiple race condition and symbolic link flaws. A local attacker could use these flaws to potentially escalate their privileges on the system. It was discovered that the kernel-invoked coredump processor provided by ABRT wrote core dumps to files owned by other system users. This could result in information disclosure if an application crashed while its current directory was a directory writable to by other users.