{"id":"CVE-2006-4436","aliases":["DEBIAN-CVE-2006-4436","DSA-1175-1","EUVD-2006-4424","GHSA-8rrj-gp2f-j85m"],"status":"published","title":"isakmpd in OpenBSD 3.8, 3.9, and possibly earlier versions, creates Security Associations (SA)...","description":"isakmpd in OpenBSD 3.8, 3.9, and possibly earlier versions, creates Security Associations (SA) with a replay window of size 0 when isakmpd acts as a responder during SA negotiation, which allows remote attackers to replay IPSec packets and bypass the replay protection.","severity":{"version":"2.0","score":5,"vector":"AV:N/AC:L/Au:N/C:P/I:N/A:N","level":"medium","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-08","score":0.01832,"percentile":0.79035,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"published":"2006-08-29T00:00:00Z","modified":"2026-06-16T22:29:05Z","fixes":[{"ecosystem":"Debian:3.1","package":"isakmpd","fixed_in":["20041012-1sarge1"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Debian:3.1","package":"isakmpd","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"20041012-1sarge1"}]}],"versions":["20041012-1"]}],"products":[{"vendor":"openbsd","product":"openbsd"}],"references":[{"url":"http://www.openbsd.org/errata38.html#isakmpd","tags":["vendor-advisory","x_refsource_OPENBSD","x_transferred","web"]},{"url":"http://www.osvdb.org/28194","tags":["vdb-entry","x_refsource_OSVDB","x_transferred","web"]},{"url":"https://exchange.xforce.ibmcloud.com/vulnerabilities/28645","tags":["vdb-entry","x_refsource_XF","x_transferred","web"]},{"url":"http://securitytracker.com/id?1016757","tags":["vdb-entry","x_refsource_SECTRACK","x_transferred","Patch","fix"]},{"url":"http://secunia.com/advisories/21652","tags":["third-party-advisory","x_refsource_SECUNIA","x_transferred","Patch","Vendor Advisory","fix"]},{"url":"http://www.debian.org/security/2006/dsa-1175","tags":["vendor-advisory","x_refsource_DEBIAN","x_transferred","advisory"]},{"url":"http://www.securityfocus.com/bid/19712","tags":["vdb-entry","x_refsource_BID","x_transferred","Patch","fix"]},{"url":"http://secunia.com/advisories/21905","tags":["third-party-advisory","x_refsource_SECUNIA","x_transferred","advisory"]},{"url":"http://www.openbsd.org/errata.html#isakmpd","tags":["vendor-advisory","x_refsource_OPENBSD","x_transferred","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2006-4436"},{"url":"https://github.com/advisories/GHSA-8rrj-gp2f-j85m"}],"sources":{"cve":[{"id":"CVE-2006-4436","description":"isakmpd in OpenBSD 3.8, 3.9, and possibly earlier versions, creates Security Associations (SA) with a replay window of size 0 when isakmpd acts as a responder during SA negotiation, which allows remote attackers to replay IPSec packets and bypass the replay protection.","status":"published","published":"2006-08-29T00:00:00Z","modified":"2024-08-07T19:06:07.753Z","updated_at":"2026-11-02T14:33:51.085765Z"}],"euvd":[{"id":"EUVD-2006-4424","description":"isakmpd in OpenBSD 3.8, 3.9, and possibly earlier versions, creates Security Associations (SA) with a replay window of size 0 when isakmpd acts as a responder during SA negotiation, which allows remote attackers to replay IPSec packets and bypass the replay protection.","status":"published","published":"2006-08-29T00:00:00Z","modified":"2024-08-07T19:06:07Z","updated_at":"2026-11-03T01:15:52.149607Z"}],"ghsa":[{"id":"GHSA-8rrj-gp2f-j85m","title":"isakmpd in OpenBSD 3.8, 3.9, and possibly earlier versions, creates Security Associations (SA)...","description":"isakmpd in OpenBSD 3.8, 3.9, and possibly earlier versions, creates Security Associations (SA) with a replay window of size 0 when isakmpd acts as a responder during SA negotiation, which allows remote attackers to replay IPSec packets and bypass the replay protection.","status":"published","published":"2022-05-01T07:18:45Z","modified":"2023-01-31T05:01:52Z","updated_at":"2026-11-02T14:48:09.208669Z"}],"nvd":[{"id":"CVE-2006-4436","description":"isakmpd in OpenBSD 3.8, 3.9, and possibly earlier versions, creates Security Associations (SA) with a replay window of size 0 when isakmpd acts as a responder during SA negotiation, which allows remote attackers to replay IPSec packets and bypass the replay protection.","status":"published","published":"2006-08-29T00:04:00Z","modified":"2026-06-16T22:29:05.847Z","cvss":[{"version":"2.0","score":5,"vector":"AV:N/AC:L/Au:N/C:P/I:N/A:N","level":"medium","assessor":"primary"}],"updated_at":"2026-11-02T14:01:05.928789Z"}],"osv":[{"id":"CVE-2006-4436","description":"isakmpd in OpenBSD 3.8, 3.9, and possibly earlier versions, creates Security Associations (SA) with a replay window of size 0 when isakmpd acts as a responder during SA negotiation, which allows remote attackers to replay IPSec packets and bypass the replay protection.","status":"withdrawn","published":"2006-08-29T00:04:00Z","modified":"2024-06-04T04:00:19Z","updated_at":"2026-11-02T15:43:56.865964Z"},{"id":"DSA-1175-1","title":"isakmpd","status":"published","published":"2006-09-13T00:00:00Z","modified":"2026-03-09T01:01:37.692933Z","updated_at":"2026-11-02T15:46:14.285228Z"}]}}