Vulnerability CVE-2009-4409
Published: 2009-12-23   Modified: 2012-02-13

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.

Type:

CWE-287

 (Improper Authentication)

CVSS2 => (AV:N/AC:H/Au:N/C:N/I:P/A:N)

CVSS Base Score
Impact Subscore
Exploitability Subscore
2.6/10
2.9/10
4.9/10
Exploit range
Attack complexity
Authentication
Remote
High
No required
Confidentiality impact
Integrity impact
Availability impact
None
Partial
None
Affected software
IIJ -> Seil/b1 

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