{"id":"CVE-2009-1957","aliases":["DEBIAN-CVE-2009-1957","DSA-1899-1","EUVD-2009-1952","GHSA-j58f-q3cq-42r5"],"status":"published","title":"charon/sa/ike_sa.c in the charon daemon in strongSWAN before 4.3.1 allows remote attackers to...","description":"charon/sa/ike_sa.c in the charon daemon in strongSWAN before 4.3.1 allows remote attackers to cause a denial of service (NULL pointer dereference and crash) via an invalid IKE_SA_INIT request that triggers \"an incomplete state,\" followed by a CREATE_CHILD_SA request.","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":"2026-11-08","score":0.02947,"percentile":0.87246,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-399"],"published":"2009-06-06T18:00:00Z","modified":"2026-10-23T17:47:35Z","fixes":[{"ecosystem":"Debian:12","package":"strongswan","fixed_in":["4.2.14-1.1"],"sources":["osv"]},{"ecosystem":"Debian:13","package":"strongswan","fixed_in":["4.2.14-1.1"],"sources":["osv"]},{"ecosystem":"Debian:14","package":"strongswan","fixed_in":["4.2.14-1.1"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Debian:12","package":"strongswan","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.2.14-1.1"}]}]},{"source":"osv","ecosystem":"Debian:13","package":"strongswan","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.2.14-1.1"}]}]},{"source":"osv","ecosystem":"Debian:14","package":"strongswan","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.2.14-1.1"}]}]},{"source":"osv","ecosystem":"Debian:4.0","package":"strongswan","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.8.0+dfsg-1+etch2"}]}],"versions":["2.8.0+dfsg-1","2.8.0+dfsg-1+etch1"],"bundled":4},{"source":"osv","ecosystem":"Debian:5.0","package":"strongswan","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.2.4-5+lenny3"}]}],"versions":["4.2.4-5","4.2.4-5+lenny1","4.2.4-5+lenny2"],"bundled":4}],"products":[{"vendor":"strongswan","product":"strongswan"}],"references":[{"url":"http://secunia.com/advisories/35296","tags":["third-party-advisory","x_refsource_SECUNIA","x_transferred","advisory"]},{"url":"http://download.strongswan.org/patches/03_invalid_ike_state_patch/strongswan-4.x.x_invalid_ike_state.patch","tags":["x_refsource_CONFIRM","x_transferred","Patch","fix"]},{"url":"http://secunia.com/advisories/36922","tags":["third-party-advisory","x_refsource_SECUNIA","x_transferred","advisory"]},{"url":"https://lists.strongswan.org/pipermail/users/2009-May/003457.html","tags":["mailing-list","x_refsource_MLIST","x_transferred","web"]},{"url":"http://www.debian.org/security/2009/dsa-1899","tags":["vendor-advisory","x_refsource_DEBIAN","x_transferred","advisory"]},{"url":"http://www.securityfocus.com/bid/35178","tags":["vdb-entry","x_refsource_BID","x_transferred","web"]},{"url":"http://secunia.com/advisories/35685","tags":["third-party-advisory","x_refsource_SECUNIA","x_transferred","advisory"]},{"url":"http://lists.opensuse.org/opensuse-security-announce/2009-07/msg00002.html","tags":["vendor-advisory","x_refsource_SUSE","x_transferred","web"]},{"url":"http://download.strongswan.org/CHANGES4.txt","tags":["x_refsource_CONFIRM","x_transferred","Patch","fix"]},{"url":"http://download.strongswan.org/patches/03_invalid_ike_state_patch/strongswan-4.x.x_invalid_ike_state.readme","tags":["x_refsource_CONFIRM","x_transferred","Vendor Advisory","advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2009-1957"},{"url":"https://github.com/advisories/GHSA-j58f-q3cq-42r5"},{"url":"https://security-tracker.debian.org/tracker/CVE-2009-1957","tags":["advisory"]}],"sources":{"cve":[{"id":"CVE-2009-1957","description":"charon/sa/ike_sa.c in the charon daemon in strongSWAN before 4.3.1 allows remote attackers to cause a denial of service (NULL pointer dereference and crash) via an invalid IKE_SA_INIT request that triggers \"an incomplete state,\" followed by a CREATE_CHILD_SA request.","status":"published","published":"2009-06-06T18:00:00Z","modified":"2024-08-07T05:36:19.193Z","updated_at":"2026-11-02T14:33:25.516454Z"}],"euvd":[{"id":"EUVD-2009-1952","description":"charon/sa/ike_sa.c in the charon daemon in strongSWAN before 4.3.1 allows remote attackers to cause a denial of service (NULL pointer dereference and crash) via an invalid IKE_SA_INIT request that triggers \"an incomplete state,\" followed by a CREATE_CHILD_SA request.","status":"published","published":"2009-06-06T18:00:00Z","modified":"2024-08-07T05:36:19Z","updated_at":"2026-11-03T01:39:19.419771Z"}],"ghsa":[{"id":"GHSA-j58f-q3cq-42r5","title":"charon/sa/ike_sa.c in the charon daemon in strongSWAN before 4.3.1 allows remote attackers to...","description":"charon/sa/ike_sa.c in the charon daemon in strongSWAN before 4.3.1 allows remote attackers to cause a denial of service (NULL pointer dereference and crash) via an invalid IKE_SA_INIT request that triggers \"an incomplete state,\" followed by a CREATE_CHILD_SA request.","status":"published","published":"2022-05-02T03:30:19Z","modified":"2023-01-31T05:08:07Z","updated_at":"2026-11-02T14:49:20.355285Z"}],"nvd":[{"id":"CVE-2009-1957","description":"charon/sa/ike_sa.c in the charon daemon in strongSWAN before 4.3.1 allows remote attackers to cause a denial of service (NULL pointer dereference and crash) via an invalid IKE_SA_INIT request that triggers \"an incomplete state,\" followed by a CREATE_CHILD_SA request.","status":"published","published":"2009-06-08T01:00:00.733Z","modified":"2026-06-16T23:08:26.73Z","cvss":[{"version":"2.0","score":5,"vector":"AV:N/AC:L/Au:N/C:N/I:N/A:P","level":"medium","assessor":"primary"}],"cwes":["CWE-399"],"updated_at":"2026-11-02T14:01:35.733785Z"}],"osv":[{"id":"CVE-2009-1957","description":"charon/sa/ike_sa.c in the charon daemon in strongSWAN before 4.3.1 allows remote attackers to cause a denial of service (NULL pointer dereference and crash) via an invalid IKE_SA_INIT request that triggers \"an incomplete state,\" followed by a CREATE_CHILD_SA request.","status":"published","published":"2009-06-08T01:00:00Z","modified":"2026-04-10T03:40:48.592204Z","updated_at":"2026-11-02T15:43:57.714116Z"},{"id":"DEBIAN-CVE-2009-1957","description":"charon/sa/ike_sa.c in the charon daemon in strongSWAN before 4.3.1 allows remote attackers to cause a denial of service (NULL pointer dereference and crash) via an invalid IKE_SA_INIT request that triggers \"an incomplete state,\" followed by a CREATE_CHILD_SA request.","status":"published","published":"2009-06-08T01:00:00.733Z","modified":"2026-10-23T17:47:35.182448627Z","updated_at":"2026-11-02T15:45:24.013654Z"},{"id":"DSA-1899-1","title":"strongswan - denial of service","status":"published","published":"2009-10-02T00:00:00Z","modified":"2026-03-09T01:19:14.011882Z","updated_at":"2026-11-02T15:46:14.734124Z"}]}}