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Unrated severityNVD Advisory· Published Dec 23, 2009· Updated Apr 23, 2026

CVE-2009-4409

CVE-2009-4409

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.

Affected products

11
  • Iij/Seil\/b111 versions
    cpe:2.3:h:iij:seil\/b1:1.00:*:*:*:*:*:*:*+ 10 more
    • cpe:2.3:h:iij:seil\/b1:1.00:*:*:*:*:*:*:*
    • cpe:2.3:h:iij:seil\/b1:2.01:*:*:*:*:*:*:*
    • cpe:2.3:h:iij:seil\/b1:2.10:*:*:*:*:*:*:*
    • cpe:2.3:h:iij:seil\/b1:2.20:*:*:*:*:*:*:*
    • cpe:2.3:h:iij:seil\/b1:2.30:*:*:*:*:*:*:*
    • cpe:2.3:h:iij:seil\/b1:2.40:*:*:*:*:*:*:*
    • cpe:2.3:h:iij:seil\/b1:2.41:*:*:*:*:*:*:*
    • cpe:2.3:h:iij:seil\/b1:2.42:*:*:*:*:*:*:*
    • cpe:2.3:h:iij:seil\/b1:2.50:*:*:*:*:*:*:*
    • cpe:2.3:h:iij:seil\/b1:2.51:*:*:*:*:*:*:*
    • cpe:2.3:h:iij:seil\/b1:2.52:*:*:*:*:*:*:*

Patches

0

No patches discovered yet.

Vulnerability mechanics

AI mechanics synthesis has not run for this CVE yet.

References

6

News mentions

0

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