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CVE-2004-0230 is a denial-of-service vulnerability in TCP connection handling in which the use of a large TCP window size reduces the difficulty of guessing acceptable sequence numbers for an active connection. An off-path remote attacker can exploit this by repeatedly injecting forged TCP reset packets and, in some implementations, specially crafted SYN packets for an already established connection. If the spoofed packet carries sequence information that falls within the receiver’s accepted window, the target TCP stack may tear down the connection. The issue is especially significant for long-lived TCP sessions such as BGP peering, where persistent connections remain active long enough to make repeated sequence-number guessing practical.
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What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.
What an attacker gets, and what they’ve been doing with it.
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Patch, then assume compromise.
No valid public exploits. Mallory filtered out 7 candidates as fakes, detection scripts, or README-only repos.
All candidate exploits were filtered out by Mallory's validation.
Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.
Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
5 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
Example vulnerability cited in the CVSS specification as a remotely exploitable denial-of-service issue triggered by a specially crafted TCP packet.
Referenced as an example of a remotely exploitable network denial-of-service vulnerability in the CVSS specification.
Example CVE cited in the CVSS specification to illustrate a network attack vector for denial of service; not the subject of the document.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.