BSD Operating Systems vulnerable to denial-of-service (DoS)


BSD operating systems contain an issue in the handling of the TCP session timer, which may lead to a denial-of-service (DoS) vulnerability.

Hiroki Takakura reported this vulnerability to IPA.
JPCERT/CC coordinated with the developer under Information Security Early Warning Partnership.
CVSS Severity (What is CVSS?)

Base Metrics: 4.3 (Medium) [IPA Score]
  • Access Vector: Network
  • Access Complexity: Medium
  • Authentication: None
  • Confidentiality Impact: None
  • Integrity Impact: None
  • Availability Impact: Partial

Affected Products

Operating systems that implement the BSD IP stack based on Net/2 are affected by this vulnerability.

FreeBSD version 5.4 has been confirmed to be vulnerable.

FreeBSD Project.
  • FreeBSD


When a sepcially crafted packet from a malicious server is received, a condition where client resources are not released may occur. As a result, clients using an OS listed under "Affected Systems" may be vulnerable to a denial-of-service (DoS) attack.

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Vendor Information

FreeBSD Project. NetBSD Foundation, Inc. OpenBSD
CWE (What is CWE?)

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

  1. CVE-2014-7250

  1. JVN : JVN#07930208
  2. National Vulnerability Database (NVD) : CVE-2014-7250
Revision History

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