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TI-2009-04172 Aliases CVE-2009-4409GHSA-8c96-xx6x-rr2w

The (1) CHAP and (2) MS-CHAP-V2 authentication capabilities in the PPP Access…

Priority LOW 16CWE-287Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
— Not recorded in CVSS 2.0
Attack complexity
High
Impact type
Security bypass
Confidentiality · integrity · availability
None · Partial · None
Fix status
No fix listed

Attack profile from CVSS 2.0 · NVD. Fix status from CNA. Impact type from CWE-287.

Summary

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.

Why it matters now

EPSS 0.01356 71st percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
——all versions—No fix listedCNA
  • — Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 11

CPEVersionsRoleVendor
cpe:2.3:h:iij:seil\/b1:1.00:*:*:*:*:*:*:*1.00VulnerableIij
cpe:2.3:h:iij:seil\/b1:2.01:*:*:*:*:*:*:*2.01VulnerableIij
cpe:2.3:h:iij:seil\/b1:2.10:*:*:*:*:*:*:*2.10VulnerableIij
cpe:2.3:h:iij:seil\/b1:2.20:*:*:*:*:*:*:*2.20VulnerableIij
cpe:2.3:h:iij:seil\/b1:2.30:*:*:*:*:*:*:*2.30VulnerableIij
cpe:2.3:h:iij:seil\/b1:2.40:*:*:*:*:*:*:*2.40VulnerableIij
cpe:2.3:h:iij:seil\/b1:2.41:*:*:*:*:*:*:*2.41VulnerableIij
cpe:2.3:h:iij:seil\/b1:2.42:*:*:*:*:*:*:*2.42VulnerableIij
cpe:2.3:h:iij:seil\/b1:2.50:*:*:*:*:*:*:*2.50VulnerableIij
cpe:2.3:h:iij:seil\/b1:2.51:*:*:*:*:*:*:*2.51VulnerableIij
  • cpe:2.3:h:iij:seil\/b1:1.00:*:*:*:*:*:*:* Versions 1.00 Vulnerable ·Iij
  • cpe:2.3:h:iij:seil\/b1:2.01:*:*:*:*:*:*:* Versions 2.01 Vulnerable ·Iij
  • cpe:2.3:h:iij:seil\/b1:2.10:*:*:*:*:*:*:* Versions 2.10 Vulnerable ·Iij
  • cpe:2.3:h:iij:seil\/b1:2.20:*:*:*:*:*:*:* Versions 2.20 Vulnerable ·Iij
  • cpe:2.3:h:iij:seil\/b1:2.30:*:*:*:*:*:*:* Versions 2.30 Vulnerable ·Iij
  • cpe:2.3:h:iij:seil\/b1:2.40:*:*:*:*:*:*:* Versions 2.40 Vulnerable ·Iij
  • cpe:2.3:h:iij:seil\/b1:2.41:*:*:*:*:*:*:* Versions 2.41 Vulnerable ·Iij
  • cpe:2.3:h:iij:seil\/b1:2.42:*:*:*:*:*:*:* Versions 2.42 Vulnerable ·Iij
  • cpe:2.3:h:iij:seil\/b1:2.50:*:*:*:*:*:*:* Versions 2.50 Vulnerable ·Iij
  • cpe:2.3:h:iij:seil\/b1:2.51:*:*:*:*:*:*:* Versions 2.51 Vulnerable ·Iij
Show 1 more CPE
CPEVersionsRoleVendor
cpe:2.3:h:iij:seil\/b1:2.52:*:*:*:*:*:*:*2.52VulnerableIij
  • cpe:2.3:h:iij:seil\/b1:2.52:*:*:*:*:*:*:* Versions 2.52 Vulnerable ·Iij

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2009-4409
  2. 2026-10-03 Alias added: GHSA-8c96-xx6x-rr2w

References

Advisory 3

Other 1

  • TI-2009-04055 Buffer overflow in the URL filtering function in Internet Initiative Japan SEIL/X1… CVSS 2.0HIGH 9.3
  • TI-2011-00381 Buffer overflow in the PPP Access Concentrator (PPPAC) on the SEIL/x86 with firmware 1.00… CVSS 2.0HIGH 8.3
  • TI-2013-04130 Buffer overflow in the PPP Access Concentrator (PPPAC) on the SEIL/x86 with firmware… CVSS 2.0MEDIUM 6.8
  • TI-2009-04056 Internet Initiative Japan SEIL/X1, SEIL/X2, and SEIL/B1 firmware 2.30 through 2.51, when… CVSS 2.0HIGH 7.1
  • TI-2015-00826 npppd in the PPP Access Concentrator (PPPAC) on SEIL SEIL/x86 Fuji routers 1.00 through… CVSS 2.0HIGH 7.1
  • TI-2014-01572 The PPP Access Concentrator (PPPAC) on SEIL SEIL/x86 routers 1.00 through 3.10, SEIL/X1… CVSS 2.0MEDIUM 5.0
See all 7 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences