Published:2011/02/28  Last Updated:2011/02/28

SEIL Series routers vulnerable to buffer overflow


SEIL Series routers contain a buffer overflow vulnerability.

Products Affected

  • SEIL/x86 firmware 1.00 to 1.61
  • SEIL/B1 firmware 1.00 to 3.11
  • SEIL/X1 firmware 1.00 to 3.11
  • SEIL/X2 firmware 1.00 to 3.11
  • SEIL/Turbo firmware 1.80 to 2.10
  • SEIL/neu 2FE Plus firmware 1.80 to 2.10


The PPP Access Concentrator (PPPAC) contained in SEIL Series routers contain a buffer overflow vulnerability when processing PPPoE packets.


An attacker may be able to execute arbitrary code.

Accoding to the developer, all versions of SEIL/86, SEIL/B1, SEIL/X1, SEIL/X2 3.00 through 3.11 process PPPoE packets in a non-administrative mode of operation, therefore the affect of this vulnerability is limited to the PPPAC service being stopped.


Update the Software
Update to the latest version according to the information provided by the developer.

This issue was resolved in the following versions.

  • SEIL/x86 firmware 1.62
  • SEIL/B1 firmware 3.12
  • SEIL/X1 firmware 3.12
  • SEIL/X2 firmware 3.12
  • SEIL/Turbo firmware 2.11
  • SEIL/neu 2FE Plus firmware 2.11

Vendor Status

Vendor Status Last Update Vendor Notes
Internet Initiative Japan Inc. vulnerable 2011/02/28


  1. IPA
    Security Alert for Vulnerability in SEIL Series routers

JPCERT/CC Addendum

Vulnerability Analysis by JPCERT/CC

Analyzed on 2011.02.28

Measures Conditions Severity
Access Required must be attacked from a local segment, such as Ethernet, Bluetooth, and 802.11 attacks
  • Mid-High
Authentication anonymous or no authentication (IP addresses do not count)
  • High
User Interaction Required the user must be convinced to take a difficult or suspicious action. If the honest user must have elevated privileges, they are likely to be more suspicious
  • Low
Exploit Complexity some expertise and/or luck required (most buffer overflows, guessing correctly in small space, expertise in Windows function calls)
  • Mid-High

Description of each analysis measures


Other Information

JPCERT Reports
CERT Advisory
CPNI Advisory
CVE CVE-2011-0454
JVN iPedia JVNDB-2011-000014

Update History

Information under the section "References" was modified.