U.S. flag   An official website of the United States government
Dot gov

Official websites use .gov
A .gov website belongs to an official government organization in the United States.


Secure .gov websites use HTTPS
A lock (Dot gov) or https:// means you've safely connected to the .gov website. Share sensitive information only on official, secure websites.


NIST has updated the NVD program announcement page with additional information regarding recent concerns and the temporary delays in enrichment efforts.

CVE-2008-4609 Detail


The TCP implementation in (1) Linux, (2) platforms based on BSD Unix, (3) Microsoft Windows, (4) Cisco products, and probably other operating systems allows remote attackers to cause a denial of service (connection queue exhaustion) via multiple vectors that manipulate information in the TCP state table, as demonstrated by sockstress.

Evaluator Description

Please see also: http://blog.robertlee.name/2008/10/more-detailed-response-to-gordons-post.html and http://www.curbrisk.com/security-blog/robert-e-lee-discusses-tcp-denial-service-vulnerability-sc-magazine.html


CVSS 3.x Severity and Metrics:

Base Score:  N/A
NVD assessment not yet provided.

NVD Analysts use publicly available information to associate vector strings and CVSS scores. We also display any CVSS information provided within the CVE List from the CNA.

Note: NVD Analysts have not published a CVSS score for this CVE at this time. NVD Analysts use publicly available information at the time of analysis to associate CVSS vector strings.

Evaluator Impact

The impact of this vulnerability has yet to be determined. The full list of affected platforms is subject to change. The NVD will continue to monitor this vulnerability and adjust the configurations as needed.

Vendor Statements (disclaimer)

Official Statement from Red Hat (09/08/2009)

The attacks reported by Outpost24 AB target the design limitations of the TCP protocol. Due to upstreams decision not to release updates, Red Hat do not plan to release updates to resolve these issues however, the effects of these attacks can be reduced via the mitigation methods as written in http://kbase.redhat.com/faq/docs/DOC-18730.

References to Advisories, Solutions, and Tools

By selecting these links, you will be leaving NIST webspace. We have provided these links to other web sites because they may have information that would be of interest to you. No inferences should be drawn on account of other sites being referenced, or not, from this page. There may be other web sites that are more appropriate for your purpose. NIST does not necessarily endorse the views expressed, or concur with the facts presented on these sites. Further, NIST does not endorse any commercial products that may be mentioned on these sites. Please address comments about this page to nvd@nist.gov.

Hyperlink Resource
http://blog.robertlee.name/2008/10/conjecture-speculation.html Broken Link 
http://lists.immunitysec.com/pipermail/dailydave/2008-October/005360.html Broken Link 
http://marc.info/?l=bugtraq&m=125856010926699&w=2 Third Party Advisory 
http://searchsecurity.techtarget.com.au/articles/27154-TCP-is-fundamentally-borked Broken Link 
http://www.cisco.com/en/US/products/products_security_advisory09186a0080af511d.shtml Broken Link 
http://www.cisco.com/en/US/products/products_security_response09186a0080a15120.html Broken Link 
http://www.cpni.gov.uk/Docs/tn-03-09-security-assessment-TCP.pdf Broken Link 
http://www.mandriva.com/security/advisories?name=MDVSA-2013:150 Broken Link 
http://www.oracle.com/technetwork/topics/security/cpujul2012-392727.html Third Party Advisory 
http://www.outpost24.com/news/news-2008-10-02.html Broken Link 
http://www.us-cert.gov/cas/techalerts/TA09-251A.html Third Party Advisory  US Government Resource 
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2009/ms09-048 Patch  Third Party Advisory 
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A6340 Broken Link 
https://www.cert.fi/haavoittuvuudet/2008/tcp-vulnerabilities.html Broken Link 

Weakness Enumeration

CWE-ID CWE Name Source
NVD-CWE-noinfo Insufficient Information cwe source acceptance level NIST  
CWE-16 Configuration cwe source acceptance level NIST  

Known Affected Software Configurations Switch to CPE 2.2

CPEs loading, please wait.