CVE-2004-0257: n/a vulnerability

CVE-2004-0257: OpenBSD 3.4 and NetBSD 1.6 and 1.6.1 allow remote attackers to cause a denial of service (crash) by sending...

OpenBSD 3.4 and NetBSD 1.6 and 1.6.1 allow remote attackers to cause a denial of service (crash) by sending an IPv6 packet with a small MTU to a listening port and then issuing a TCP connect to that port.

UnknownCVSS not scoredNot KEV-listedUpdatedAug 8, 2024, 00:10 UTC (UTC+00:00)

Security readout for executives and security teams

CVE-2004-0257 is a remote denial-of-service issue in legacy OpenBSD 3.4 and NetBSD 1.6/1.6.1 systems. An attacker reaching an IPv6-enabled listening service could crash the affected kernel. This is mainly a concern for organizations still operating very old BSD systems exposed to IPv6 traffic. Exposure is likely limited to legacy OpenBSD 3.4 or NetBSD 1.6/1.6.1 hosts with IPv6 reachable services. Modern systems are not identified as affected in the provided sources. Treat as urgent only if affected legacy BSD systems are still operating with IPv6 exposure. Otherwise, track as a legacy hygiene item during asset retirement and network exposure reviews. Mitigation focus: Identify any OpenBSD 3.4 or NetBSD 1.6/1.6.1 systems.; Consult OpenBSD and NetBSD vendor guidance for the historical fix path.; Upgrade or retire unsupported affected systems where possible..

Prepared: Jul 11, 2026, 23:22 UTC (UTC+00:00)

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

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Vulnerability profileCVE Program record

Severity: Unknown
CVSS: Not scored
Known Exploited: No
Published: Sep 1, 2004, 04:00 UTC (UTC+00:00)

Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

0CVSS vectors

0Timeline events

0ADP providers

2Source links

CVSS and timeline data

No CVSS vectors or timeline events were available in the normalized CVE source material.

Source materials

CVE List V5 sourceCVE List V5
openbsd-ipv6-dos(15044)CVE reference · vdb-entry, x_refsource_XF

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus

n/an/an/aListed

Weakness

CWE details

No CWE listed

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