Published:2014/06/13  Last Updated:2014/06/13

SEIL Series routers vulnerable to denial-of-service (DoS)


SEIL Series routers contain a denial-of-service (DoS) vulnerability.

Products Affected

  • SEIL/x86 1.00 to 3.10
  • SEIL/X1 1.00 to 4.50
  • SEIL/X2 1.00 to 4.50
  • SEIL/B1 1.00 to 4.50
  • SEIL/Turbo 1.80 to 2.17
  • SEIL/neu 2FE Plus 1.80 to 2.17


The PPP Access Concentrator (PPPAC) in SEIL Series routers provided by Internet Initiative Japan Inc. contain a denial-of-service (DoS) vulnerability due to an issue in processing certain packets. (CWE-119)


By receiving a specially crafted TCP packet, a session established using PPPAC may be disconnected or stop accepting connections.


Update the Firmware
Apply the appropriate firmware update provided by the developer.

Apply a workaround

According to the developer, updated firmware for SEIL/Turbo and SEIL/neu 2FE Plus are still being developed.
If using either of these products, apply the appropriate workarounds according to the information provided by the developer.

Vendor Status

Vendor Status Last Update Vendor Notes
Internet Initiative Japan Inc. Vulnerable 2014/06/13 Internet Initiative Japan Inc. website


JPCERT/CC Addendum

Vulnerability Analysis by JPCERT/CC

Analyzed on 2014.06.13 (CVSS Base Metrics)

What is CVSS?

Measures Severity Description
Access Vector(AV) Local (L) Adjacent Network (A) Network (N) A vulnerability exploitable with network access means the vulnerable software is bound to the network stack and the attacker does not require local network access or local access. Such a vulnerability is often termed "remotely exploitable".
Access Complexity(AC) High (H) Medium (M) Low (L) Specialized access conditions or extenuating circumstances do not exist.
Authentication(Au) Multiple (M) Single (S) None (N) Authentication is not required to exploit the vulnerability.
Confidentiality Impact(C) None (N) Partial (P) Complete (C) There is no impact to the confidentiality of the system.
Integrity Impact(I) None (N) Partial (P) Complete (C) There is no impact to the integrity of the system.
Availability Impact(A) None (N) Partial (P) Complete (C) There is reduced performance or interruptions in resource availability.

Base Score:5.0


Other Information

JPCERT Reports
CERT Advisory
CPNI Advisory
CVE CVE-2014-2004
JVN iPedia JVNDB-2014-000055