Feed/CVE-2009-4409
CVE-2009-4409LOWCVSS 2.6

CVE-2009-4409

Published Dec 23, 2009·Updated Jun 16, 2026

NVD 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.

CVSS Vector

AV:N/AC:H/Au:N/C:N/I:P/A:N

References

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