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


The DNS forwarder, the PPP Access Concentrator (L2TP) and the Measure(iPerf server) function in SEIL Series routers provided by Internet Initiative Japan Inc. contain a denial-of-service (DoS) vulnerability due to a flaw in processing certain packets.

Internet Initiative Japan Inc. reported this vulnerability to JPCERT/CC to notify users of its solution through JVN. JPCERT/CC and Internet Initiative Japan Inc. coordinated under the Information Security Early Warning Partnership.
CVSS Severity (What is CVSS?)

CVSS V3 Severity:
Base Metrics 5.3 (Medium) [IPA Score]
  • Attack Vector: Network
  • Attack Complexity: Low
  • Privileges Required: None
  • User Interaction: None
  • Scope: Unchanged
  • Confidentiality Impact: None
  • Integrity Impact: None
  • Availability Impact: Low
CVSS V2 Severity:
Base Metrics 5.0 (Medium) [IPA Score]
  • Access Vector: Network
  • Access Complexity: Low
  • Authentication: None
  • Confidentiality Impact: None
  • Integrity Impact: None
  • Availability Impact: Partial
Affected Products

Internet Initiative Japan Inc.
  • SEIL/B1 1.00 to 5.62
  • SEIL/BPV4 5.00 to 5.62
  • SEIL/X1 1.30 to 5.62
  • SEIL/X2 1.30 to 5.62
  • SEIL/x86 Fuji 1.70 to 5.62


Receiving a specially crafted SSTP packet may result in the device becoming unresponsive.

[Update the Firmware]
Apply the appropriate firmware update provided by the developer.
Vendor Information

Internet Initiative Japan Inc.
CWE (What is CWE?)

  1. No Mapping(CWE-Other) [IPA Evaluation]
CVE (What is CVE?)

  1. CVE-2017-2153

  1. JVN : JVN#86171513
  2. National Vulnerability Database (NVD) : CVE-2017-2153
Revision History

  • [2017/04/19]
      Web page was published
      References : Content was added