CVE-2009-4409 Information

Description

The (1) CHAP and (2) MS-CHAP-V2 authentication capabilities in the PPP Access Concentrator (PPPAC) function in Internet Initiative Japan SEIL/B1 firmware 1.00 through 2.52 use the same challenge for each authentication attempt which allows remote attackers to bypass authentication via a replay attack.

Reference

http://jvn.jp/en/jp/JVN49602378/index.html http://jvndb.jvn.jp/ja/contents/2009/JVNDB-2009-000079.html http://secunia.com/advisories/37628 http://www.osvdb.org/61118 http://www.securityfocus.com/bid/37293 http://www.seil.jp/seilseries/security/2009/a00697.php