{"id":"CVE-2013-4434","aliases":["DEBIAN-CVE-2013-4434","EUVD-2013-4311","GHSA-7j5m-wjm2-xppv","MGASA-2013-0318","UBUNTU-CVE-2013-4434"],"status":"published","title":"Dropbear SSH Server before 2013.59 generates error messages for a failed logon attempt with...","description":"Dropbear SSH Server before 2013.59 generates error messages for a failed logon attempt with different time delays depending on whether the user account exists, which allows remote attackers to discover valid usernames.","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":"2026-11-09","score":0.05749,"percentile":0.93121,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":true,"fix_available":true},"cwes":["CWE-189"],"published":"2013-10-25T21:10:23Z","modified":"2026-09-01T20:03:18Z","exploits":[{"source":"pocgithub","id":"styx00/Dropbear_CVE-2013-4434","title":"styx00/Dropbear_CVE-2013-4434","date":"2016-03-20","url":"https://github.com/styx00/Dropbear_CVE-2013-4434"}],"fixes":[{"ecosystem":"Debian:12","package":"dropbear","fixed_in":["2012.55-1.4"],"sources":["osv"]},{"ecosystem":"Debian:13","package":"dropbear","fixed_in":["2012.55-1.4"],"sources":["osv"]},{"ecosystem":"Debian:14","package":"dropbear","fixed_in":["2012.55-1.4"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Debian:12","package":"dropbear","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2012.55-1.4"}]}]},{"source":"osv","ecosystem":"Debian:13","package":"dropbear","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2012.55-1.4"}]}]},{"source":"osv","ecosystem":"Debian:14","package":"dropbear","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2012.55-1.4"}]}]},{"source":"osv","ecosystem":"Mageia:2","package":"dropbear","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2013.59-1.mga2"}]}],"bundled":2},{"source":"osv","ecosystem":"Mageia:3","package":"dropbear","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2013.59-1.mga3"}]}],"bundled":2}],"products":[{"vendor":"dropbear_ssh_project","product":"dropbear_ssh"}],"references":[{"url":"http://secunia.com/advisories/55173","tags":["third-party-advisory","x_refsource_SECUNIA","x_transferred","Vendor Advisory","advisory"]},{"url":"https://matt.ucc.asn.au/dropbear/CHANGES","tags":["x_refsource_CONFIRM","x_transferred","Vendor Advisory","advisory","web"]},{"url":"http://www.securityfocus.com/bid/62993","tags":["vdb-entry","x_refsource_BID","x_transferred","Third Party Advisory","VDB Entry","advisory"]},{"url":"http://www.openwall.com/lists/oss-security/2013/10/16/11","tags":["mailing-list","x_refsource_MLIST","x_transferred","Mailing List","Third Party Advisory","advisory","article"]},{"url":"http://lists.opensuse.org/opensuse-updates/2013-11/msg00046.html","tags":["vendor-advisory","x_refsource_SUSE","x_transferred","Third Party Advisory","advisory"]},{"url":"https://support.citrix.com/article/CTX216642","tags":["x_refsource_CONFIRM","x_transferred","Third Party Advisory","advisory"]},{"url":"http://lists.opensuse.org/opensuse-updates/2013-10/msg00061.html","tags":["vendor-advisory","x_refsource_SUSE","x_transferred","Third Party Advisory","advisory"]},{"url":"https://secure.ucc.asn.au/hg/dropbear/rev/d7784616409a","tags":["x_refsource_CONFIRM","x_transferred","Patch","Third Party Advisory","advisory","fix"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2013-4434"},{"url":"https://github.com/advisories/GHSA-7j5m-wjm2-xppv"},{"url":"https://security-tracker.debian.org/tracker/CVE-2013-4434","tags":["advisory"]},{"url":"https://advisories.mageia.org/MGASA-2013-0318.html","tags":["advisory"]},{"url":"http://openwall.com/lists/oss-security/2013/10/11/4","tags":["web"]},{"url":"https://bugs.mageia.org/show_bug.cgi?id=11442","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2013-4434","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2013-4434","tags":["report"]}],"sources":{"cve":[{"id":"CVE-2013-4434","description":"Dropbear SSH Server before 2013.59 generates error messages for a failed logon attempt with different time delays depending on whether the user account exists, which allows remote attackers to discover valid usernames.","status":"published","published":"2013-10-25T23:00:00Z","modified":"2024-08-06T16:45:14.079Z","updated_at":"2026-11-02T14:34:58.193873Z"}],"euvd":[{"id":"EUVD-2013-4311","description":"Dropbear SSH Server before 2013.59 generates error messages for a failed logon attempt with different time delays depending on whether the user account exists, which allows remote attackers to discover valid usernames.","status":"published","published":"2013-10-25T23:00:00Z","modified":"2024-08-06T16:45:14Z","updated_at":"2026-11-03T01:56:31.667445Z"}],"ghsa":[{"id":"GHSA-7j5m-wjm2-xppv","title":"Dropbear SSH Server before 2013.59 generates error messages for a failed logon attempt with...","description":"Dropbear SSH Server before 2013.59 generates error messages for a failed logon attempt with different time delays depending on whether the user account exists, which allows remote attackers to discover valid usernames.","status":"published","published":"2022-05-14T02:03:46Z","modified":"2023-02-02T05:05:18Z","updated_at":"2026-11-02T14:52:03.631935Z"}],"nvd":[{"id":"CVE-2013-4434","description":"Dropbear SSH Server before 2013.59 generates error messages for a failed logon attempt with different time delays depending on whether the user account exists, which allows remote attackers to discover valid usernames.","status":"published","published":"2013-10-25T23:55:03.957Z","modified":"2026-06-16T23:57:13.417Z","cvss":[{"version":"2.0","score":5,"vector":"AV:N/AC:L/Au:N/C:P/I:N/A:N","level":"medium","assessor":"primary"}],"cwes":["CWE-189"],"updated_at":"2026-11-02T14:02:40.988689Z"}],"osv":[{"id":"CVE-2013-4434","description":"Dropbear SSH Server before 2013.59 generates error messages for a failed logon attempt with different time delays depending on whether the user account exists, which allows remote attackers to discover valid usernames.","status":"published","published":"2013-10-25T23:55:03Z","modified":"2026-04-16T06:22:34.982371957Z","updated_at":"2026-11-02T15:43:59.09154Z"},{"id":"DEBIAN-CVE-2013-4434","description":"Dropbear SSH Server before 2013.59 generates error messages for a failed logon attempt with different time delays depending on whether the user account exists, which allows remote attackers to discover valid usernames.","status":"published","published":"2013-10-25T23:55:03.957Z","modified":"2026-09-01T20:03:18.29086971Z","updated_at":"2026-11-02T15:45:25.514579Z"},{"id":"MGASA-2013-0318","title":"Updated dropbear packages fix CVE-2013-4421","description":"Updated dropbear package fixes security vulnerability:\n\nPossible memory exhaustion denial of service due to the size of\ndecompressed payloads in dropbear before 2013.59 (CVE-2013-4421).\n\nInconsistent delays in authorization failures could be used to\ndisclose the existence of valid user accounts in dropbear before\n2013.59 (CVE-2013-4434).\n","status":"published","published":"2013-10-25T21:10:23Z","modified":"2026-04-16T06:26:02.1206646Z","updated_at":"2026-11-02T15:49:39.121227Z"},{"id":"UBUNTU-CVE-2013-4434","description":"Dropbear SSH Server before 2013.59 generates error messages for a failed logon attempt with different time delays depending on whether the user account exists, which allows remote attackers to discover valid usernames.","status":"withdrawn","published":"2013-10-25T23:55:00Z","modified":"2025-07-16T08:10:46.398097Z","updated_at":"2026-11-02T15:54:07.421078Z"}]}}