{"id":"CVE-2012-0920","aliases":["DEBIAN-CVE-2012-0920","DSA-2456-1","EUVD-2012-0943","GHSA-hw56-hwpj-4432"],"status":"published","title":"Use-after-free vulnerability in Dropbear SSH Server 0.52 through 2012.54, when command...","description":"Use-after-free vulnerability in Dropbear SSH Server 0.52 through 2012.54, when command restriction and public key authentication are enabled, allows remote authenticated users to execute arbitrary code and bypass command restrictions via multiple crafted command requests, related to \"channels concurrency.\"","severity":{"version":"2.0","score":7.1,"vector":"AV:N/AC:H/Au:S/C:C/I:C/A:C","level":"high","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-08","score":0.06417,"percentile":0.93738,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-399"],"published":"2012-04-23T00:00:00Z","modified":"2026-10-23T17:47:42Z","fixes":[{"ecosystem":"Debian:12","package":"dropbear","fixed_in":["2012.55-1"],"sources":["osv"]},{"ecosystem":"Debian:13","package":"dropbear","fixed_in":["2012.55-1"],"sources":["osv"]},{"ecosystem":"Debian:14","package":"dropbear","fixed_in":["2012.55-1"],"sources":["osv"]},{"ecosystem":"Debian:6.0","package":"dropbear","fixed_in":["0.52-5+squeeze1"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Debian:12","package":"dropbear","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2012.55-1"}]}]},{"source":"osv","ecosystem":"Debian:13","package":"dropbear","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2012.55-1"}]}]},{"source":"osv","ecosystem":"Debian:14","package":"dropbear","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2012.55-1"}]}]},{"source":"osv","ecosystem":"Debian:6.0","package":"dropbear","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.52-5+squeeze1"}]}],"versions":["0.52-5"]}],"products":[{"vendor":"debian","product":"debian_linux"},{"vendor":"dropbear_ssh_project","product":"dropbear_ssh"}],"references":[{"url":"https://exchange.xforce.ibmcloud.com/vulnerabilities/73444","tags":["vdb-entry","x_refsource_XF","x_transferred","Third Party Advisory","VDB Entry","advisory"]},{"url":"http://secunia.com/advisories/48147","tags":["third-party-advisory","x_refsource_SECUNIA","x_transferred","Third Party Advisory","advisory"]},{"url":"http://www.debian.org/security/2012/dsa-2456","tags":["vendor-advisory","x_refsource_DEBIAN","x_transferred","Third Party Advisory","advisory"]},{"url":"http://www.osvdb.org/79590","tags":["vdb-entry","x_refsource_OSVDB","x_transferred","Broken Link","web"]},{"url":"http://matt.ucc.asn.au/dropbear/CHANGES","tags":["x_refsource_CONFIRM","x_transferred","Vendor Advisory","advisory"]},{"url":"http://www.securityfocus.com/bid/52159","tags":["vdb-entry","x_refsource_BID","x_transferred","Third Party Advisory","VDB Entry","advisory"]},{"url":"https://secure.ucc.asn.au/hg/dropbear/rev/818108bf7749","tags":["x_refsource_CONFIRM","x_transferred","Vendor Advisory","advisory"]},{"url":"https://www.mantor.org/~northox/misc/CVE-2012-0920.html","tags":["x_refsource_MISC","x_transferred","Third Party Advisory","advisory"]},{"url":"http://secunia.com/advisories/48929","tags":["third-party-advisory","x_refsource_SECUNIA","x_transferred","Third Party Advisory","advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2012-0920"},{"url":"https://github.com/advisories/GHSA-hw56-hwpj-4432"},{"url":"https://security-tracker.debian.org/tracker/CVE-2012-0920","tags":["advisory"]}],"sources":{"cve":[{"id":"CVE-2012-0920","description":"Use-after-free vulnerability in Dropbear SSH Server 0.52 through 2012.54, when command restriction and public key authentication are enabled, allows remote authenticated users to execute arbitrary code and bypass command restrictions via multiple crafted command requests, related to \"channels concurrency.\"","status":"published","published":"2012-06-05T22:00:00Z","modified":"2024-08-06T18:38:15.055Z","updated_at":"2026-11-02T14:34:52.638543Z"}],"euvd":[{"id":"EUVD-2012-0943","description":"Use-after-free vulnerability in Dropbear SSH Server 0.52 through 2012.54, when command restriction and public key authentication are enabled, allows remote authenticated users to execute arbitrary code and bypass command restrictions via multiple crafted command requests, related to \"channels concurrency.\"","status":"published","published":"2012-06-05T22:00:00Z","modified":"2024-08-06T18:38:15Z","updated_at":"2026-11-03T01:56:19.286375Z"}],"ghsa":[{"id":"GHSA-hw56-hwpj-4432","title":"Use-after-free vulnerability in Dropbear SSH Server 0.52 through 2012.54, when command...","description":"Use-after-free vulnerability in Dropbear SSH Server 0.52 through 2012.54, when command restriction and public key authentication are enabled, allows remote authenticated users to execute arbitrary code and bypass command restrictions via multiple crafted command requests, related to \"channels concurrency.\"","status":"published","published":"2022-05-14T02:03:46Z","modified":"2023-02-02T05:04:48Z","updated_at":"2026-11-02T14:51:57.541Z"}],"nvd":[{"id":"CVE-2012-0920","description":"Use-after-free vulnerability in Dropbear SSH Server 0.52 through 2012.54, when command restriction and public key authentication are enabled, allows remote authenticated users to execute arbitrary code and bypass command restrictions via multiple crafted command requests, related to \"channels concurrency.\"","status":"published","published":"2012-06-05T22:55:09.437Z","modified":"2026-06-16T23:38:30.607Z","cvss":[{"version":"2.0","score":7.1,"vector":"AV:N/AC:H/Au:S/C:C/I:C/A:C","level":"high","assessor":"primary"}],"cwes":["CWE-399"],"updated_at":"2026-11-02T14:02:14.336529Z"}],"osv":[{"id":"CVE-2012-0920","description":"Use-after-free vulnerability in Dropbear SSH Server 0.52 through 2012.54, when command restriction and public key authentication are enabled, allows remote authenticated users to execute arbitrary code and bypass command restrictions via multiple crafted command requests, related to \"channels concurrency.\"","status":"published","published":"2012-06-05T22:55:09Z","modified":"2026-04-10T03:42:14.739247Z","updated_at":"2026-11-02T15:43:58.537032Z"},{"id":"DEBIAN-CVE-2012-0920","description":"Use-after-free vulnerability in Dropbear SSH Server 0.52 through 2012.54, when command restriction and public key authentication are enabled, allows remote authenticated users to execute arbitrary code and bypass command restrictions via multiple crafted command requests, related to \"channels concurrency.\"","status":"published","published":"2012-06-05T22:55:09.437Z","modified":"2026-10-23T17:47:42.696202016Z","updated_at":"2026-11-02T15:45:24.92418Z"},{"id":"DSA-2456-1","title":"dropbear - use after free","status":"published","published":"2012-04-23T00:00:00Z","modified":"2026-03-09T01:22:16.431697Z","updated_at":"2026-11-02T15:46:15.489951Z"}]}}