{"id":"CVE-2000-0553","aliases":["EUVD-2000-0550","GHSA-wmhx-3hr4-6h39"],"status":"published","title":"Race condition in IPFilter firewall 3.4.3 and earlier, when configured with overlapping \"return...","description":"Race condition in IPFilter firewall 3.4.3 and earlier, when configured with overlapping \"return-rst\" and \"keep state\" rules, allows remote attackers to bypass access restrictions.","severity":{"version":"2.0","score":2.6,"vector":"AV:N/AC:H/Au:N/C:N/I:P/A:N","level":"low","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-07","score":0.01411,"percentile":0.72839,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"published":"2000-05-26T04:00:00Z","modified":"2026-06-16T21:51:59Z","products":[{"vendor":"darren_reed","product":"ipfilter"}],"references":[{"url":"https://exchange.xforce.ibmcloud.com/vulnerabilities/4994","tags":["vdb-entry","x_refsource_XF","x_transferred"]},{"url":"http://www.securityfocus.com/bid/1308","tags":["vdb-entry","x_refsource_BID","x_transferred","Patch","Vendor Advisory"]},{"url":"http://archives.neohapsis.com/archives/bugtraq/2000-05/0326.html","tags":["mailing-list","x_refsource_BUGTRAQ","x_transferred","Exploit","Patch","Vendor Advisory"]},{"url":"http://www.osvdb.org/1377","tags":["vdb-entry","x_refsource_OSVDB","x_transferred"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2000-0553"},{"url":"https://github.com/advisories/GHSA-wmhx-3hr4-6h39"}],"sources":{"cve":[{"id":"CVE-2000-0553","description":"Race condition in IPFilter firewall 3.4.3 and earlier, when configured with overlapping \"return-rst\" and \"keep state\" rules, allows remote attackers to bypass access restrictions.","status":"published","published":"2000-10-13T04:00:00Z","modified":"2024-08-08T05:21:31.248Z","updated_at":"2026-11-02T14:33:41.23606Z"}],"euvd":[{"id":"EUVD-2000-0550","description":"Race condition in IPFilter firewall 3.4.3 and earlier, when configured with overlapping \"return-rst\" and \"keep state\" rules, allows remote attackers to bypass access restrictions.","status":"published","published":"2000-10-13T04:00:00Z","modified":"2024-08-08T05:21:31Z","updated_at":"2026-11-03T00:56:24.66443Z"}],"ghsa":[{"id":"GHSA-wmhx-3hr4-6h39","title":"Race condition in IPFilter firewall 3.4.3 and earlier, when configured with overlapping \"return...","description":"Race condition in IPFilter firewall 3.4.3 and earlier, when configured with overlapping \"return-rst\" and \"keep state\" rules, allows remote attackers to bypass access restrictions.","status":"published","published":"2022-04-30T18:13:51Z","modified":"2023-01-30T05:04:50Z","updated_at":"2026-11-02T14:47:08.270573Z"}],"nvd":[{"id":"CVE-2000-0553","description":"Race condition in IPFilter firewall 3.4.3 and earlier, when configured with overlapping \"return-rst\" and \"keep state\" rules, allows remote attackers to bypass access restrictions.","status":"published","published":"2000-05-26T04:00:00Z","modified":"2026-06-16T21:51:59.123Z","cvss":[{"version":"2.0","score":2.6,"vector":"AV:N/AC:H/Au:N/C:N/I:P/A:N","level":"low","assessor":"primary"}],"updated_at":"2026-11-02T13:58:51.654586Z"}]}}