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.
References (6)
Core 6
Core References
Vendor Advisory third-party-advisory
x_refsource_secunia
http://secunia.com/advisories/37628
Third Party Advisory, VDB Entry vdb-entry
x_refsource_bid
http://www.securityfocus.com/bid/37293
Third Party Advisory third-party-advisory
x_refsource_jvn
http://jvn.jp/en/jp/JVN49602378/index.html
Third Party Advisory, VDB Entry vdb-entry
x_refsource_osvdb
http://www.osvdb.org/61118
Vendor Advisory x_refsource_confirm
http://www.seil.jp/seilseries/security/2009/a00697.php
Third Party Advisory third-party-advisory
x_refsource_jvndb
http://jvndb.jvn.jp/ja/contents/2009/JVNDB-2009-000079.html
Scores
EPSS
0.0136
EPSS Percentile
68.2%
Details
CWE
CWE-287
Status
published
Products (11)
iij/seil\/b1
1.00
iij/seil\/b1
2.01
iij/seil\/b1
2.10
iij/seil\/b1
2.20
iij/seil\/b1
2.30
iij/seil\/b1
2.40
iij/seil\/b1
2.41
iij/seil\/b1
2.42
iij/seil\/b1
2.50
iij/seil\/b1
2.51
... and 1 more
Published
Dec 23, 2009
Tracked Since
Feb 18, 2026