{"id":"CVE-2004-0257","aliases":["EUVD-2004-0257","GHSA-vqm2-c8wp-mmg7"],"status":"published","title":"OpenBSD 3.4 and NetBSD 1.6 and 1.6.1 allow remote attackers to cause a denial of service (crash)...","description":"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.","severity":{"version":"2.0","score":5,"vector":"AV:N/AC:L/Au:N/C:N/I:N/A:P","level":"medium","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-07","score":0.02473,"percentile":0.8462,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"published":"2004-09-01T04:00:00Z","modified":"2026-06-16T22:05:16Z","products":[{"vendor":"netbsd","product":"netbsd"},{"vendor":"openbsd","product":"openbsd"}],"references":[{"url":"http://www.guninski.com/obsdmtu.html","tags":["x_refsource_MISC","x_transferred"]},{"url":"http://www.openbsd.org/cgi-bin/cvsweb/src/sys/netinet6/ip6_output.c","tags":["x_refsource_CONFIRM","x_transferred"]},{"url":"http://marc.info/?l=bugtraq\u0026m=107604603226564\u0026w=2","tags":["mailing-list","x_refsource_BUGTRAQ","x_transferred"]},{"url":"http://lists.grok.org.uk/pipermail/full-disclosure/2004-February/016704.html","tags":["mailing-list","x_refsource_FULLDISC","x_transferred"]},{"url":"http://www.osvdb.org/3825","tags":["vdb-entry","x_refsource_OSVDB","x_transferred"]},{"url":"https://exchange.xforce.ibmcloud.com/vulnerabilities/15044","tags":["vdb-entry","x_refsource_XF","x_transferred"]},{"url":"http://www.securityfocus.com/bid/9577","tags":["vdb-entry","x_refsource_BID","x_transferred","Patch","Vendor Advisory"]},{"url":"ftp://ftp.netbsd.org/pub/NetBSD/security/advisories/NetBSD-SA2004-002.txt.asc","tags":["vendor-advisory","x_refsource_NETBSD","x_transferred"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2004-0257"},{"url":"https://github.com/advisories/GHSA-vqm2-c8wp-mmg7"}],"sources":{"cve":[{"id":"CVE-2004-0257","description":"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.","status":"published","published":"2004-09-01T04:00:00Z","modified":"2024-08-08T00:10:03.769Z","updated_at":"2026-11-02T14:34:54.758165Z"}],"euvd":[{"id":"EUVD-2004-0257","description":"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.","status":"published","published":"2004-09-01T04:00:00Z","modified":"2024-08-08T00:10:03Z","updated_at":"2026-11-03T01:15:20.041361Z"}],"ghsa":[{"id":"GHSA-vqm2-c8wp-mmg7","title":"OpenBSD 3.4 and NetBSD 1.6 and 1.6.1 allow remote attackers to cause a denial of service (crash)...","description":"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.","status":"published","published":"2022-05-03T03:12:59Z","modified":"2023-02-01T05:01:08Z","updated_at":"2026-11-02T14:49:40.629091Z"}],"nvd":[{"id":"CVE-2004-0257","description":"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.","status":"published","published":"2004-11-23T05:00:00Z","modified":"2026-06-16T22:05:16.1Z","cvss":[{"version":"2.0","score":5,"vector":"AV:N/AC:L/Au:N/C:N/I:N/A:P","level":"medium","assessor":"primary"}],"updated_at":"2026-11-02T14:00:51.000028Z"}]}}