{"id":"CVE-2006-3251","aliases":["DEBIAN-CVE-2006-3251","DSA-1114","EUVD-2006-3248","GHSA-f7fm-rw62-26cq"],"status":"published","title":"Heap-based buffer overflow in the array_push function in hashcash.c for Hashcash before 1.21...","description":"Heap-based buffer overflow in the array_push function in hashcash.c for Hashcash before 1.21 might allow attackers to execute arbitrary code via crafted entries.","severity":{"version":"2.0","score":7.5,"vector":"AV:N/AC:L/Au:N/C:P/I:P/A:P","level":"high","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-09","score":0.03654,"percentile":0.89693,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-119"],"published":"2006-06-27T18:00:00Z","modified":"2026-10-22T23:47:32Z","fixes":[{"ecosystem":"Debian:12","package":"hashcash","fixed_in":["1.21"],"sources":["osv"]},{"ecosystem":"Debian:13","package":"hashcash","fixed_in":["1.21"],"sources":["osv"]},{"ecosystem":"Debian:14","package":"hashcash","fixed_in":["1.21"],"sources":["osv"]},{"ecosystem":"Debian:3.1","package":"hashcash","fixed_in":["1.17-1sarge1"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Debian:12","package":"hashcash","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.21"}]}]},{"source":"osv","ecosystem":"Debian:13","package":"hashcash","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.21"}]}]},{"source":"osv","ecosystem":"Debian:14","package":"hashcash","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.21"}]}]},{"source":"osv","ecosystem":"Debian:3.1","package":"hashcash","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.17-1sarge1"}]}],"versions":["1.17-1"]}],"products":[{"vendor":"hashcash","product":"hashcash"}],"references":[{"url":"http://www.vupen.com/english/advisories/2006/2551","tags":["vdb-entry","x_refsource_VUPEN","x_transferred","Vendor Advisory","advisory"]},{"url":"https://exchange.xforce.ibmcloud.com/vulnerabilities/27422","tags":["vdb-entry","x_refsource_XF","x_transferred","web"]},{"url":"http://secunia.com/advisories/20800","tags":["third-party-advisory","x_refsource_SECUNIA","x_transferred","Vendor Advisory","advisory"]},{"url":"http://secunia.com/advisories/21146","tags":["third-party-advisory","x_refsource_SECUNIA","x_transferred","Vendor Advisory","advisory"]},{"url":"http://www.gentoo.org/security/en/glsa/glsa-200606-25.xml","tags":["vendor-advisory","x_refsource_GENTOO","x_transferred","web"]},{"url":"http://www.debian.org/security/2006/dsa-1114","tags":["vendor-advisory","x_refsource_DEBIAN","x_transferred","advisory"]},{"url":"http://secunia.com/advisories/20846","tags":["third-party-advisory","x_refsource_SECUNIA","x_transferred","Vendor Advisory","advisory"]},{"url":"http://www.hashcash.org/source/CHANGELOG","tags":["x_refsource_CONFIRM","x_transferred","web"]},{"url":"http://www.securityfocus.com/bid/18659","tags":["vdb-entry","x_refsource_BID","x_transferred","Patch","fix"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2006-3251"},{"url":"https://github.com/advisories/GHSA-f7fm-rw62-26cq"},{"url":"https://security-tracker.debian.org/tracker/CVE-2006-3251","tags":["advisory"]}],"sources":{"cve":[{"id":"CVE-2006-3251","description":"Heap-based buffer overflow in the array_push function in hashcash.c for Hashcash before 1.21 might allow attackers to execute arbitrary code via crafted entries.","status":"published","published":"2006-06-27T18:00:00Z","modified":"2024-08-07T18:23:21.363Z","updated_at":"2026-11-02T14:33:50.024504Z"}],"euvd":[{"id":"EUVD-2006-3248","description":"Heap-based buffer overflow in the array_push function in hashcash.c for Hashcash before 1.21 might allow attackers to execute arbitrary code via crafted entries.","status":"published","published":"2006-06-27T18:00:00Z","modified":"2024-08-07T18:23:21Z","updated_at":"2026-11-03T01:15:57.220997Z"}],"ghsa":[{"id":"GHSA-f7fm-rw62-26cq","title":"Heap-based buffer overflow in the array_push function in hashcash.c for Hashcash before 1.21...","description":"Heap-based buffer overflow in the array_push function in hashcash.c for Hashcash before 1.21 might allow attackers to execute arbitrary code via crafted entries.","status":"published","published":"2022-05-01T07:07:10Z","modified":"2023-01-31T05:01:32Z","cwes":["CWE-119"],"updated_at":"2026-11-02T14:48:04.808361Z"}],"nvd":[{"id":"CVE-2006-3251","description":"Heap-based buffer overflow in the array_push function in hashcash.c for Hashcash before 1.21 might allow attackers to execute arbitrary code via crafted entries.","status":"published","published":"2006-06-27T18:05:00Z","modified":"2026-06-16T22:26:42.433Z","cvss":[{"version":"2.0","score":7.5,"vector":"AV:N/AC:L/Au:N/C:P/I:P/A:P","level":"high","assessor":"primary"}],"cwes":["CWE-119"],"updated_at":"2026-11-02T14:01:04.288594Z"}],"osv":[{"id":"CVE-2006-3251","description":"Heap-based buffer overflow in the array_push function in hashcash.c for Hashcash before 1.21 might allow attackers to execute arbitrary code via crafted entries.","status":"published","published":"2006-06-27T18:05:00Z","modified":"2026-04-10T03:37:37.929784Z","updated_at":"2026-11-02T15:43:56.581247Z"},{"id":"DEBIAN-CVE-2006-3251","description":"Heap-based buffer overflow in the array_push function in hashcash.c for Hashcash before 1.21 might allow attackers to execute arbitrary code via crafted entries.","status":"published","published":"2006-06-27T18:05:00Z","modified":"2026-10-22T23:47:32.920154678Z","updated_at":"2026-11-02T15:45:23.105674Z"},{"id":"DSA-1114","title":"hashcash - buffer overflow","status":"published","published":"2006-07-21T00:00:00Z","modified":"2026-03-09T01:01:21.751976Z","updated_at":"2026-11-02T15:46:14.285228Z"}]}}