Description
AVM FRITZ!OS before 6.30 extracts the contents of firmware updates before verifying their cryptographic signature, which allows remote attackers to create symlinks or overwrite critical files, and consequently execute arbitrary code, via a crafted firmware image.
References
- 20160107 [RT-SA-2014-014] AVM FRITZ!Box: Arbitrary Code Execution Through Manipulated Firmware Images mailing-list
- 20160107 [RT-SA-2014-014] AVM FRITZ!Box: Arbitrary Code Execution Through Manipulated Firmware Images mailing-list
- https://www.redteam-pentesting.de/advisories/rt-sa-2014-014
- http://packetstormsecurity.com/files/135161/AVM-FRITZ-Box-Arbitrary-Code-Execution-Via-Firmware-Images.html
- https://avm.de/service/sicherheitsinfos-zu-updates/