{"id":"CVE-2012-3543","aliases":["DEBIAN-CVE-2012-3543","EUVD-2012-3491","GHSA-r6qx-59w8-q9p9","MGASA-2014-0244","SUSE-SU-2016:0257-1","SUSE-SU-2016:2958-1","UBUNTU-CVE-2012-3543","USN-2547-1"],"status":"published","title":"mono 2.10.x ASP.NET Web Form Hash collision DoS","description":"mono 2.10.x ASP.NET Web Form Hash collision DoS","severity":{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-08","score":0.02583,"percentile":0.85338,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-20"],"published":"2012-08-28T00:00:00Z","modified":"2026-10-23T18:02:52Z","fixes":[{"ecosystem":"Debian:12","package":"mono","fixed_in":["2.10.8.1-7"],"sources":["osv"]},{"ecosystem":"Debian:13","package":"mono","fixed_in":["2.10.8.1-7"],"sources":["osv"]},{"ecosystem":"Debian:14","package":"mono","fixed_in":["2.10.8.1-7"],"sources":["osv"]},{"ecosystem":"Mageia:3","package":"mono","fixed_in":["2.10.9-4.1.mga3"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Debian:12","package":"mono","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.10.8.1-7"}]}]},{"source":"osv","ecosystem":"Debian:13","package":"mono","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.10.8.1-7"}]}]},{"source":"osv","ecosystem":"Debian:14","package":"mono","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.10.8.1-7"}]}]},{"source":"osv","ecosystem":"Mageia:3","package":"mono","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.10.9-4.1.mga3"}]}]},{"source":"osv","ecosystem":"SUSE:Linux Enterprise Software Development Kit 11 SP3","package":"mono-core","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.6.7-0.16.1"}]}],"bundled":2},{"source":"osv","ecosystem":"SUSE:Linux Enterprise Software Development Kit 11 SP4","package":"mono-core","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.6.7-0.16.1"}]}],"bundled":2},{"source":"osv","ecosystem":"SUSE:Linux Enterprise Desktop 11 SP4","package":"mono-core","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.6.7-0.16.1"}]}],"bundled":2},{"source":"osv","ecosystem":"SUSE:Linux Enterprise Server 11 SP3","package":"mono-core","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.6.7-0.16.1"}]}],"bundled":2},{"source":"osv","ecosystem":"SUSE:Linux Enterprise Server 11 SP3-TERADATA","package":"mono-core","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.6.7-0.16.1"}]}],"bundled":2},{"source":"osv","ecosystem":"SUSE:Linux Enterprise Server for SAP Applications 11 SP3","package":"mono-core","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.6.7-0.16.1"}]}],"bundled":2},{"source":"osv","ecosystem":"SUSE:Linux Enterprise Server 11 SP4","package":"mono-core","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.6.7-0.16.1"}]}],"bundled":2},{"source":"osv","ecosystem":"SUSE:Linux Enterprise Server for SAP Applications 11 SP4","package":"mono-core","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.6.7-0.16.1"}]}],"bundled":2},{"source":"osv","ecosystem":"SUSE:Linux Enterprise Software Development Kit 11 SP4","package":"mono-core","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.6.7-0.18.1"}]}],"bundled":2},{"source":"osv","ecosystem":"SUSE:Linux Enterprise Server 11 SP3-LTSS","package":"mono-core","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.6.7-0.18.1"}]}],"bundled":2},{"source":"osv","ecosystem":"SUSE:Linux Enterprise Server 11 SP3-TERADATA","package":"mono-core","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.6.7-0.18.1"}]}],"bundled":2},{"source":"osv","ecosystem":"SUSE:Linux Enterprise Server 11 SP4","package":"mono-core","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.6.7-0.18.1"}]}],"bundled":2},{"source":"osv","ecosystem":"SUSE:Linux Enterprise Server for SAP Applications 11 SP4","package":"mono-core","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.6.7-0.18.1"}]}],"bundled":2},{"source":"osv","ecosystem":"Ubuntu:14.04:LTS","package":"mono","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.2.8+dfsg-4ubuntu1.1"}]}],"versions":["2.10.8.1-5ubuntu2","3.2.3+dfsg-5","3.2.3+dfsg-7ubuntu1","3.2.8+dfsg-4ubuntu1"],"bundled":5}],"products":[{"vendor":"canonical","product":"ubuntu_linux"},{"vendor":"debian","product":"debian_linux"},{"vendor":"mono","product":"mono"},{"vendor":"mono-project","product":"mono"}],"references":[{"url":"https://security-tracker.debian.org/tracker/CVE-2012-3543","tags":["x_refsource_MISC","x_transferred","Third Party Advisory","advisory"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2012-3543","tags":["x_refsource_MISC","x_transferred","Issue Tracking","Patch","Third Party Advisory","advisory","fix","report"]},{"url":"https://bugzilla.suse.com/show_bug.cgi?id=CVE-2012-3543","tags":["x_refsource_MISC","x_transferred","Issue Tracking","Patch","Third Party Advisory","advisory","fix","report"]},{"url":"https://access.redhat.com/security/cve/cve-2012-3543","tags":["x_refsource_MISC","x_transferred","Broken Link","web"]},{"url":"https://bugs.gentoo.org/show_bug.cgi?id=CVE-2012-3543","tags":["x_refsource_MISC","x_transferred","Issue Tracking","Third Party Advisory","advisory","report"]},{"url":"http://www.openwall.com/lists/oss-security/2012/08/28/14","tags":["x_refsource_MISC","x_transferred","Exploit","Mailing List","Patch","Third Party Advisory","advisory","article","evidence","fix"]},{"url":"http://www.securityfocus.com/bid/55251","tags":["x_refsource_MISC","x_transferred","Third Party Advisory","VDB Entry","advisory"]},{"url":"http://www.ubuntu.com/usn/USN-2547-1","tags":["x_refsource_MISC","x_transferred","Third Party Advisory","advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2012-3543"},{"url":"https://github.com/advisories/GHSA-r6qx-59w8-q9p9"},{"url":"https://advisories.mageia.org/MGASA-2014-0244.html","tags":["advisory"]},{"url":"https://bugs.mageia.org/show_bug.cgi?id=13413","tags":["report"]},{"url":"http://www.gentoo.org/security/en/glsa/glsa-201405-16.xml","tags":["web"]},{"url":"https://www.suse.com/support/update/announcement/2016/suse-su-20160257-1/","tags":["advisory"]},{"url":"https://bugzilla.suse.com/739119","tags":["report"]},{"url":"https://bugzilla.suse.com/958097","tags":["report"]},{"url":"https://www.suse.com/security/cve/CVE-2009-0689","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2012-3543","tags":["web"]},{"url":"https://www.suse.com/support/update/announcement/2016/suse-su-20162958-1/","tags":["advisory"]},{"url":"https://ubuntu.com/security/CVE-2012-3543","tags":["report"]},{"url":"http://www.openwall.com/lists/oss-security/2012/08/28","tags":["report"]},{"url":"https://ubuntu.com/security/notices/USN-2547-1","tags":["advisory"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2012-3543","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2011-0992","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2015-2318","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2015-2319","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2015-2320","tags":["report"]}],"sources":{"cve":[{"id":"CVE-2012-3543","description":"mono 2.10.x ASP.NET Web Form Hash collision DoS","status":"published","published":"2019-11-21T14:00:56Z","modified":"2024-08-06T20:13:50.119Z","updated_at":"2026-11-02T14:34:50.615647Z"}],"euvd":[{"id":"EUVD-2012-3491","description":"mono 2.10.x ASP.NET Web Form Hash collision DoS","status":"published","published":"2019-11-21T14:00:56Z","modified":"2024-08-06T20:13:50Z","updated_at":"2026-11-03T01:56:10.361197Z"}],"ghsa":[{"id":"GHSA-r6qx-59w8-q9p9","title":"mono 2.10.x ASP.NET Web Form Hash collision DoS","description":"mono 2.10.x ASP.NET Web Form Hash collision DoS","status":"published","published":"2022-04-23T00:40:15Z","modified":"2024-04-03T23:51:59Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"cwes":["CWE-20"],"updated_at":"2026-11-02T14:55:47.283285Z"}],"nvd":[{"id":"CVE-2012-3543","description":"mono 2.10.x ASP.NET Web Form Hash collision DoS","status":"published","published":"2019-11-21T14:15:12.613Z","modified":"2026-06-16T23:43:26.357Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"primary"},{"version":"2.0","score":5,"vector":"AV:N/AC:L/Au:N/C:N/I:N/A:P","level":"medium","assessor":"primary"}],"cwes":["CWE-20"],"updated_at":"2026-11-02T14:02:18.043773Z"}],"osv":[{"id":"CVE-2012-3543","description":"mono 2.10.x ASP.NET Web Form Hash collision DoS","status":"published","published":"2019-11-21T14:15:12Z","modified":"2026-04-16T06:19:24.903579429Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T15:43:58.537032Z"},{"id":"DEBIAN-CVE-2012-3543","description":"mono 2.10.x ASP.NET Web Form Hash collision DoS","status":"published","published":"2019-11-21T14:15:12.613Z","modified":"2026-10-23T18:02:52.703761937Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T15:45:24.92418Z"},{"id":"UBUNTU-CVE-2012-3543","description":"mono 2.10.x ASP.NET Web Form Hash collision DoS","status":"withdrawn","published":"2012-08-28T00:00:00Z","modified":"2026-02-04T02:19:10.685438Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T15:54:06.854805Z"},{"id":"MGASA-2014-0244","title":"Updated mono packages fix security vulnerability","description":"Mono 2.10.9 does not properly randomize hash functions for form posts to\nprotect against hash collision attacks. A remote attacker could send\nspecially crafted parameters, possibly resulting in a Denial of Service\ncondition (CVE-2012-3543).\n","status":"published","published":"2014-05-29T07:07:39Z","modified":"2026-04-16T06:26:09.809373567Z","updated_at":"2026-11-02T15:49:39.121227Z"},{"id":"SUSE-SU-2016:0257-1","title":"Security update for mono-core","description":"\nmono-core was updated to fix the following vulnerabilities:\n\n- CVE-2009-0689: Remote attackers could cause a denial of service and possibly arbitrary code execution through the string-to-double parser implementation (bsc#958097)\n- CVE-2012-3543: Remote attackers could cause a denial of service through increased CPU consumption due to lack of protection against predictable hash collisions when processing form parameters (bsc#739119)\n","status":"published","published":"2016-01-27T12:03:49Z","modified":"2026-02-04T02:42:42.725419Z","updated_at":"2026-11-02T15:53:43.030986Z"},{"id":"SUSE-SU-2016:2958-1","title":"Security update for mono-core","description":"\nmono-core was updated to fix the following vulnerabilities:\n\n- CVE-2009-0689: Remote attackers could cause a denial of service and possibly arbitrary\n  code execution through the string-to-double parser implementation. (bsc#958097)\n- CVE-2012-3543: Remote attackers could cause a denial of service through increased CPU\n  consumption due to lack of protection against predictable hash collisions when processing\n  form parameters. (bsc#739119)\n","status":"published","published":"2016-12-01T09:31:59Z","modified":"2025-05-02T04:03:48.670406Z","updated_at":"2026-11-02T15:53:43.438985Z"},{"id":"USN-2547-1","title":"mono vulnerabilities","description":"It was discovered that the Mono TLS implementation was vulnerable to the\nSKIP-TLS vulnerability. A remote attacker could possibly use this issue\nto perform client impersonation attacks. (CVE-2015-2318)\n\nIt was discovered that the Mono TLS implementation was vulnerable to the\nFREAK vulnerability. A remote attacker or a machine-in-the-middle could\npossibly use this issue to force the use of insecure ciphersuites.\n(CVE-2015-2319)\n\nIt was discovered that the Mono TLS implementation still supported a\nfallback to SSLv2. This update removes the functionality as use of SSLv2 is\nknown to be insecure. (CVE-2015-2320)\n\nIt was discovered that Mono incorrectly handled memory in certain\ncircumstances. A remote attacker could possibly use this issue to cause\nMono to crash, resulting in a denial of service, or to obtain sensitive\ninformation. This issue only applied to Ubuntu 12.04 LTS. (CVE-2011-0992)\n\nIt was discovered that Mono incorrectly handled hash collisions. A remote\nattacker could possibly use this issue to cause Mono to crash, resulting in\na denial of service. This issue only applied to Ubuntu 12.04 LTS.\n(CVE-2012-3543)\n","status":"published","published":"2015-03-24T12:44:38Z","modified":"2026-04-22T09:10:01.532088Z","updated_at":"2026-11-02T16:58:09.227524Z"}]}}