{"id":"CVE-2016-2563","aliases":["DEBIAN-CVE-2016-2563","EUVD-2016-3637","GHSA-4hmm-v4j9-3hw2","MGASA-2016-0112","MGASA-2016-0118","UBUNTU-CVE-2016-2563"],"status":"published","title":"Stack-based buffer overflow in the SCP command-line utility in PuTTY before 0.67 and KiTTY 0.66.6...","description":"Stack-based buffer overflow in the SCP command-line utility in PuTTY before 0.67 and KiTTY 0.66.6.3 and earlier allows remote servers to cause a denial of service (stack memory corruption) or execute arbitrary code via a crafted SCP-SINK file-size response to an SCP download request.","severity":{"version":"3.0","score":9.8,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-08","score":0.32805,"percentile":0.98361,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":true,"fix_available":true},"cwes":["CWE-119"],"published":"2016-03-16T18:07:23Z","modified":"2026-09-22T07:01:57Z","exploits":[{"source":"exploitdb","id":"EDB-39551","title":"Putty pscp 0.66 - Stack Buffer Overwrite","type":"dos","platform":"multiple","date":"2016-03-10","url":"https://www.exploit-db.com/exploits/39551"}],"fixes":[{"ecosystem":"Debian:12","package":"putty","fixed_in":["0.67-1"],"sources":["osv"]},{"ecosystem":"Debian:13","package":"putty","fixed_in":["0.67-1"],"sources":["osv"]},{"ecosystem":"Debian:14","package":"putty","fixed_in":["0.67-1"],"sources":["osv"]},{"ecosystem":"Mageia:5","package":"halibut","fixed_in":["1.1-2.mga5"],"sources":["osv"]},{"ecosystem":"Mageia:5","package":"putty","fixed_in":["0.67-1.mga5"],"sources":["osv"]},{"ecosystem":"Mageia:5","package":"filezilla","fixed_in":["3.16.1-1.mga5"],"sources":["osv"]},{"ecosystem":"Mageia:5","package":"libfilezilla","fixed_in":["0.4.0.1-1.mga5"],"sources":["osv"]},{"ecosystem":"Mageia:5","package":"pugixml","fixed_in":["1.7-1.mga5"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Debian:12","package":"putty","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.67-1"}]}]},{"source":"osv","ecosystem":"Debian:13","package":"putty","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.67-1"}]}]},{"source":"osv","ecosystem":"Debian:14","package":"putty","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.67-1"}]}]},{"source":"osv","ecosystem":"Mageia:5","package":"halibut","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.1-2.mga5"}]}]},{"source":"osv","ecosystem":"Mageia:5","package":"putty","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.67-1.mga5"}]}]},{"source":"osv","ecosystem":"Mageia:5","package":"filezilla","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.16.1-1.mga5"}]}]},{"source":"osv","ecosystem":"Mageia:5","package":"libfilezilla","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.4.0.1-1.mga5"}]}]},{"source":"osv","ecosystem":"Mageia:5","package":"pugixml","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.7-1.mga5"}]}]}],"products":[{"vendor":"9bis","product":"kitty"},{"vendor":"simon_tatham","product":"putty"}],"references":[{"url":"http://lists.opensuse.org/opensuse-updates/2016-05/msg00131.html","tags":["vendor-advisory","x_refsource_SUSE","x_transferred","web"]},{"url":"http://www.securitytracker.com/id/1035257","tags":["vdb-entry","x_refsource_SECTRACK","x_transferred","web"]},{"url":"https://security.gentoo.org/glsa/201606-01","tags":["vendor-advisory","x_refsource_GENTOO","x_transferred","advisory"]},{"url":"http://www.securityfocus.com/bid/84296","tags":["vdb-entry","x_refsource_BID","x_transferred","web"]},{"url":"http://www.chiark.greenend.org.uk/~sgtatham/putty/wishlist/vuln-pscp-sink-sscanf.html","tags":["x_refsource_CONFIRM","x_transferred","Patch","fix","web","report"]},{"url":"https://github.com/tintinweb/pub/tree/master/pocs/cve-2016-2563","tags":["x_refsource_MISC","x_transferred","Vendor Advisory","advisory","report"]},{"url":"http://seclists.org/fulldisclosure/2016/Mar/22","tags":["mailing-list","x_refsource_FULLDISC","x_transferred","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2016-2563"},{"url":"https://github.com/advisories/GHSA-4hmm-v4j9-3hw2"},{"url":"https://security-tracker.debian.org/tracker/CVE-2016-2563","tags":["advisory"]},{"url":"https://advisories.mageia.org/MGASA-2016-0112.html","tags":["advisory"]},{"url":"https://bugs.mageia.org/show_bug.cgi?id=17942","tags":["report"]},{"url":"http://www.chiark.greenend.org.uk/~sgtatham/putty/changes.html","tags":["web"]},{"url":"https://advisories.mageia.org/MGASA-2016-0118.html","tags":["advisory"]},{"url":"https://bugs.mageia.org/show_bug.cgi?id=17943","tags":["report"]},{"url":"https://filezilla-project.org/","tags":["web"]},{"url":"https://ubuntu.com/security/CVE-2016-2563","tags":["report"]},{"url":"http://tartarus.org/~simon-git/gitweb/?p=putty.git;a=commitdiff;h=bc6c15ab5f636e05b7e91883f0031a7e06117947","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2016-2563","tags":["report"]}],"sources":{"cve":[{"id":"CVE-2016-2563","description":"Stack-based buffer overflow in the SCP command-line utility in PuTTY before 0.67 and KiTTY 0.66.6.3 and earlier allows remote servers to cause a denial of service (stack memory corruption) or execute arbitrary code via a crafted SCP-SINK file-size response to an SCP download request.","status":"published","published":"2016-04-07T23:00:00Z","modified":"2024-08-05T23:32:20.848Z","updated_at":"2026-11-02T14:33:33.424551Z"}],"euvd":[{"id":"EUVD-2016-3637","description":"Stack-based buffer overflow in the SCP command-line utility in PuTTY before 0.67 and KiTTY 0.66.6.3 and earlier allows remote servers to cause a denial of service (stack memory corruption) or execute arbitrary code via a crafted SCP-SINK file-size response to an SCP download request.","status":"published","published":"2016-04-07T23:00:00Z","modified":"2024-08-05T23:32:20Z","updated_at":"2026-11-03T02:22:52.753944Z"}],"ghsa":[{"id":"GHSA-4hmm-v4j9-3hw2","title":"Stack-based buffer overflow in the SCP command-line utility in PuTTY before 0.67 and KiTTY 0.66.6...","description":"Stack-based buffer overflow in the SCP command-line utility in PuTTY before 0.67 and KiTTY 0.66.6.3 and earlier allows remote servers to cause a denial of service (stack memory corruption) or execute arbitrary code via a crafted SCP-SINK file-size response to an SCP download request.","status":"published","published":"2022-05-17T03:31:14Z","modified":"2023-01-27T05:07:09Z","cvss":[{"version":"3.0","score":9.8,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"cwes":["CWE-119"],"updated_at":"2026-11-02T14:43:03.960564Z"}],"nvd":[{"id":"CVE-2016-2563","description":"Stack-based buffer overflow in the SCP command-line utility in PuTTY before 0.67 and KiTTY 0.66.6.3 and earlier allows remote servers to cause a denial of service (stack memory corruption) or execute arbitrary code via a crafted SCP-SINK file-size response to an SCP download request.","status":"published","published":"2016-04-07T23:59:07.657Z","modified":"2026-06-17T00:44:18.253Z","cvss":[{"version":"3.0","score":9.8,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"primary"},{"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":"2026-11-02T14:03:22.479119Z"}],"osv":[{"id":"CVE-2016-2563","description":"Stack-based buffer overflow in the SCP command-line utility in PuTTY before 0.67 and KiTTY 0.66.6.3 and earlier allows remote servers to cause a denial of service (stack memory corruption) or execute arbitrary code via a crafted SCP-SINK file-size response to an SCP download request.","status":"published","published":"2016-04-07T23:59:07.657Z","modified":"2026-04-16T06:23:43.660893046Z","cvss":[{"version":"3.0","score":9.8,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"updated_at":"2026-11-02T15:44:02.114472Z"},{"id":"DEBIAN-CVE-2016-2563","description":"Stack-based buffer overflow in the SCP command-line utility in PuTTY before 0.67 and KiTTY 0.66.6.3 and earlier allows remote servers to cause a denial of service (stack memory corruption) or execute arbitrary code via a crafted SCP-SINK file-size response to an SCP download request.","status":"published","published":"2016-04-07T23:59:07.657Z","modified":"2026-09-22T07:01:57.594630335Z","cvss":[{"version":"3.0","score":9.8,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"updated_at":"2026-11-02T15:45:27.627285Z"},{"id":"UBUNTU-CVE-2016-2563","description":"Stack-based buffer overflow in the SCP command-line utility in PuTTY before 0.67 and KiTTY 0.66.6.3 and earlier allows remote servers to cause a denial of service (stack memory corruption) or execute arbitrary code via a crafted SCP-SINK file-size response to an SCP download request.","status":"withdrawn","published":"2016-04-07T23:59:00Z","modified":"2025-07-16T07:17:49.238345Z","cvss":[{"version":"3.0","score":9.8,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"updated_at":"2026-11-02T15:54:11.872222Z"},{"id":"MGASA-2016-0112","title":"Updated putty packages fix CVE-2016-2563","description":"Updated putty package fixes security vulnerability:\n\nMany versions of PSCP in PuTTY prior to 0.67 have a stack corruption\nvulnerability in their treatment of the 'sink' direction (i.e. downloading\nfrom server to client) of the old-style SCP protocol. In order for this\nvulnerability to be exploited, the user must connect to a malicious server\nand attempt to download any file (CVE-2016-2563).\n\nThe putty package has been updated to version 0.67 to fix this issue and a\nfew other bugs.  The halibut package has been updated to version 1.1 to build\nthe documentation.\n","status":"published","published":"2016-03-16T18:07:23Z","modified":"2026-04-16T06:24:52.656744452Z","updated_at":"2026-11-02T15:49:39.792687Z"},{"id":"MGASA-2016-0118","title":"Updated filezilla packages fix security vulnerability","description":"Many versions of PSCP in PuTTY prior to 0.67 have a stack corruption\nvulnerability in their treatment of the 'sink' direction (i.e. downloading\nfrom server to client) of the old-style SCP protocol. In order for this\nvulnerability to be exploited, the user must connect to a malicious server\nand attempt to download any file (CVE-2016-2563).\n\nFileZilla was vulnerable to this issue as it bundles a copy of PuTTY.  The\nfilezilla package has been updated to version 3.16.1, which fixes this\nissue and has many other fixes and enhancements.\n","status":"published","published":"2016-03-25T06:38:37Z","modified":"2026-04-16T06:25:02.786755641Z","updated_at":"2026-11-02T15:49:39.792687Z"}]}}