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>> phpBB "gen_rand_string" Predictable Random Numbers Vulnerability
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Title : phpBB "gen_rand_string" Predictable Random Numbers Vulnerability
VUPEN ID : VUPEN/ADV-2006-0461
CVE ID : CVE-2006-0632
Rated as : Low Risk 
Remotely Exploitable : Yes
Locally Exploitable : Yes
Release Date : 2006-02-07
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A vulnerability has been identified in phpBB, which could be exploited by remote attackers to gain knowledge of sensitive information. This flaw is due to a design error in the "gen_rand_string()" function that generates predictable random numbers, which could be exploited by malicious people to change a user's password by conducting brute force attacks against the validation ID sent via the "I forgot my password" functionality.
Affected Products
phpBB version 2.0.19 and prior
Solution
Upgrade to phpBB version 2.0.20 :
http://www.phpbb.com/downloads.php
References
http://www.vupen.com/english/advisories/2006/0461
http://www.frsirt.com/english/reference/5494
Credits
Vulnerability reported by Chinchilla
ChangeLog
2006-02-07 : Initial release
2006-04-10 : Updated Solution
Vulnerability Management
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