The QNAP TS-239 Pro and TS-639 Pro with firmware 2.1.7 0613, 3.1.0 0627, and 3.1.1 0815 use the rand library function to generate a certain recovery key, which makes it easier for local users to determine this key via a brute-force attack.
The product uses a Pseudo-Random Number Generator (PRNG) in a security context, but the PRNG's algorithm is not cryptographically strong.
Link | Tags |
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http://www.baseline-security.de/downloads/BSC-Qnap_Crypto_Backdoor-CVE-2009-3200.txt | exploit |
http://secunia.com/advisories/36793 | third party advisory broken link |
http://www.securityfocus.com/archive/1/506607/100/0/threaded | broken link mailing list third party advisory vdb entry |
http://www.securityfocus.com/bid/36467 | broken link third party advisory vdb entry |