Vulnerabilities > CVE-2014-8886 - Cryptographic Issues vulnerability in AVM Fritz! OS 6.23
Attack vector
NETWORK Attack complexity
MEDIUM Privileges required
NONE Confidentiality impact
COMPLETE Integrity impact
COMPLETE Availability impact
COMPLETE Summary
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.
Vulnerable Configurations
| Part | Description | Count |
|---|---|---|
| OS | 1 |
Common Weakness Enumeration (CWE)
Common Attack Pattern Enumeration and Classification (CAPEC)
- Signature Spoofing by Key Recreation An attacker obtains an authoritative or reputable signer's private signature key by exploiting a cryptographic weakness in the signature algorithm or pseudorandom number generation and then uses this key to forge signatures from the original signer to mislead a victim into performing actions that benefit the attacker.
Packetstorm
| data source | https://packetstormsecurity.com/files/download/135161/rt-sa-2014-014.txt |
| id | PACKETSTORM:135161 |
| last seen | 2016-12-05 |
| published | 2016-01-07 |
| reporter | redteam-pentesting.de |
| source | https://packetstormsecurity.com/files/135161/AVM-FRITZ-Box-Arbitrary-Code-Execution-Via-Firmware-Images.html |
| title | AVM FRITZ!Box: Arbitrary Code Execution Via Firmware Images |
References
- http://packetstormsecurity.com/files/135161/AVM-FRITZ-Box-Arbitrary-Code-Execution-Via-Firmware-Images.html
- http://seclists.org/fulldisclosure/2016/Jan/12
- http://www.securityfocus.com/archive/1/537246/100/0/threaded
- https://avm.de/service/sicherheitsinfos-zu-updates/
- https://www.redteam-pentesting.de/advisories/rt-sa-2014-014