TCP, when using a large Window Size, makes it easier for remote attackers to guess sequence numbers and cause a denial of service…

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.

Scores

EPSS (exploitation in 30 days)

80.3% · top 0.4% of all CVEs (4 Nov 2026)

CISA SSVC

Exploitation: none · Automatable: yes · Technical impact: partial

The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.0.

Weakness

• n/a

Affected products

• n/a

  • affected n/a

References (24)

• oval:org.mitre.oval:def:2689 (opens in a new tab)vdb-entrysignaturex_refsource_OVALx_transferred
• oval:org.mitre.oval:def:3508 (opens in a new tab)vdb-entrysignaturex_refsource_OVALx_transferred
• TA04-111A (opens in a new tab)third-party-advisoryx_refsource_CERTx_transferred
• oval:org.mitre.oval:def:5711 (opens in a new tab)vdb-entrysignaturex_refsource_OVALx_transferred
• 20040425 Perl code exploting TCP not checking RST ACK. (opens in a new tab)mailing-listx_refsource_BUGTRAQx_transferred
• SSRT061264 (opens in a new tab)vendor-advisoryx_refsource_HPx_transferred
• http://www.uniras.gov.uk/vuls/2004/236929/index.htm (opens in a new tab)x_refsource_MISCx_transferred
• MS06-064 (opens in a new tab)vendor-advisoryx_refsource_MSx_transferred
• 11440 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
• http://kb.juniper.net/JSA10638 (opens in a new tab)x_refsource_CONFIRMx_transferred
• https://kc.mcafee.com/corporate/index?page=content&id=SB10053 (opens in a new tab)x_refsource_CONFIRMx_transferred
• http://www.oracle.com/technetwork/topics/security/cpujan2015-1972971.html (opens in a new tab)x_refsource_CONFIRMx_transferred
• VU#415294 (opens in a new tab)third-party-advisoryx_refsource_CERT-VNx_transferred
• SSRT4696 (opens in a new tab)vendor-advisoryx_refsource_HPx_transferred
• MS05-019 (opens in a new tab)vendor-advisoryx_refsource_MSx_transferred
• 20040420 TCP Vulnerabilities in Multiple IOS-Based Cisco Products (opens in a new tab)vendor-advisoryx_refsource_CISCOx_transferred
• 10183 (opens in a new tab)vdb-entryx_refsource_BIDx_transferred
• oval:org.mitre.oval:def:4791 (opens in a new tab)vdb-entrysignaturex_refsource_OVALx_transferred
• oval:org.mitre.oval:def:270 (opens in a new tab)vdb-entrysignaturex_refsource_OVALx_transferred
• tcp-rst-dos(15886) (opens in a new tab)vdb-entryx_refsource_XFx_transferred
• 4030 (opens in a new tab)vdb-entryx_refsource_OSVDBx_transferred
• 22341 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
• ADV-2006-3983 (opens in a new tab)vdb-entryx_refsource_VUPENx_transferred
• 11458 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred

Sources

The same CVE in the primary databases and aggregators, to check against.

• CVE.org record (opens in a new tab)
• CVE List JSON (GitHub) (opens in a new tab)
• NVD (opens in a new tab)
• FIRST EPSS (opens in a new tab)
• OSV.dev (opens in a new tab)
• GitHub Advisories (opens in a new tab)
• CIRCL Vulnerability-Lookup (opens in a new tab)

Badge for a README or a ticket

[![CVE-2004-0230](https://trackcve.app/badge/CVE-2004-0230.svg)](https://trackcve.app/cve/CVE-2004-0230)

Record last updated 9 Oct 2026, 19:04 UTC.