{"id":"CVE-2008-4109","aliases":["DEBIAN-CVE-2008-4109","DSA-1638-1","EUVD-2008-4092","GHSA-6wrv-35h9-3pj7"],"status":"published","title":"A certain Debian patch for OpenSSH before 4.3p2-9etch3 on etch; before 4.6p1-1 on sid and lenny;...","description":"A certain Debian patch for OpenSSH before 4.3p2-9etch3 on etch; before 4.6p1-1 on sid and lenny; and on other distributions such as SUSE uses functions that are not async-signal-safe in the signal handler for login timeouts, which allows remote attackers to cause a denial of service (connection slot exhaustion) via multiple login attempts. NOTE: this issue exists because of an incorrect fix for CVE-2006-5051.","severity":{"version":"2.0","score":5,"vector":"AV:N/AC:L/Au:N/C:N/I:N/A:P","level":"medium","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-09","score":0.28601,"percentile":0.9815,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":true,"fix_available":true},"cwes":["CWE-264"],"published":"2008-09-16T00:00:00Z","modified":"2026-10-23T17:47:22Z","exploits":[{"source":"pocgithub","id":"bigb0x/CVE-2024-6387","title":"bigb0x/CVE-2024-6387","date":"2024-07-01","url":"https://github.com/bigb0x/CVE-2024-6387"}],"fixes":[{"ecosystem":"Debian:12","package":"openssh","fixed_in":["1:4.6p1-1"],"sources":["osv"]},{"ecosystem":"Debian:13","package":"openssh","fixed_in":["1:4.6p1-1"],"sources":["osv"]},{"ecosystem":"Debian:14","package":"openssh","fixed_in":["1:4.6p1-1"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Debian:12","package":"openssh","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:4.6p1-1"}]}]},{"source":"osv","ecosystem":"Debian:13","package":"openssh","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:4.6p1-1"}]}]},{"source":"osv","ecosystem":"Debian:14","package":"openssh","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:4.6p1-1"}]}]},{"source":"osv","ecosystem":"Debian:4.0","package":"openssh","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:4.3p2-9etch3"}]}],"versions":["1:4.3p2-9","1:4.3p2-9etch1","1:4.3p2-9etch2","1:4.3p2-9etch2+m68k1"],"bundled":2}],"products":[{"vendor":"openbsd","product":"openssh"}],"references":[{"url":"http://www.ubuntu.com/usn/usn-649-1","tags":["vendor-advisory","x_transferred","advisory"]},{"url":"https://exchange.xforce.ibmcloud.com/vulnerabilities/45202","tags":["vdb-entry","x_transferred","web"]},{"url":"http://secunia.com/advisories/31885","tags":["third-party-advisory","x_transferred","advisory"]},{"url":"http://www.securitytracker.com/id?1020891","tags":["vdb-entry","x_transferred","web"]},{"url":"http://www.debian.org/security/2008/dsa-1638","tags":["vendor-advisory","x_transferred","Patch","fix"]},{"url":"http://lists.opensuse.org/opensuse-security-announce/2008-10/msg00004.html","tags":["vendor-advisory","x_transferred","web"]},{"url":"http://secunia.com/advisories/32080","tags":["third-party-advisory","x_transferred","advisory"]},{"url":"http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=498678","tags":["x_transferred","web"]},{"url":"http://secunia.com/advisories/32181","tags":["third-party-advisory","x_transferred","advisory"]},{"url":"http://www.openwall.com/lists/oss-security/2024/07/01/3","tags":["mailing-list","x_transferred","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2008-4109"},{"url":"https://github.com/advisories/GHSA-6wrv-35h9-3pj7"},{"url":"https://security-tracker.debian.org/tracker/CVE-2008-4109","tags":["advisory"]}],"sources":{"cve":[{"id":"CVE-2008-4109","description":"A certain Debian patch for OpenSSH before 4.3p2-9etch3 on etch; before 4.6p1-1 on sid and lenny; and on other distributions such as SUSE uses functions that are not async-signal-safe in the signal handler for login timeouts, which allows remote attackers to cause a denial of service (connection slot exhaustion) via multiple login attempts. NOTE: this issue exists because of an incorrect fix for CVE-2006-5051.","status":"published","published":"2008-09-17T18:06:00Z","modified":"2024-08-07T10:00:42.727Z","updated_at":"2026-11-02T14:34:46.950176Z"}],"euvd":[{"id":"EUVD-2008-4092","description":"A certain Debian patch for OpenSSH before 4.3p2-9etch3 on etch; before 4.6p1-1 on sid and lenny; and on other distributions such as SUSE uses functions that are not async-signal-safe in the signal handler for login timeouts, which allows remote attackers to cause a denial of service (connection slot exhaustion) via multiple login attempts. NOTE: this issue exists because of an incorrect fix for CVE-2006-5051.","status":"published","published":"2008-09-17T18:06:00Z","modified":"2024-08-07T10:00:42Z","updated_at":"2026-11-03T01:38:49.434096Z"}],"ghsa":[{"id":"GHSA-6wrv-35h9-3pj7","title":"A certain Debian patch for OpenSSH before 4.3p2-9etch3 on etch; before 4.6p1-1 on sid and lenny;...","description":"A certain Debian patch for OpenSSH before 4.3p2-9etch3 on etch; before 4.6p1-1 on sid and lenny; and on other distributions such as SUSE uses functions that are not async-signal-safe in the signal handler for login timeouts, which allows remote attackers to cause a denial of service (connection slot exhaustion) via multiple login attempts. NOTE: this issue exists because of an incorrect fix for CVE-2006-5051.","status":"published","published":"2022-05-02T00:06:49Z","modified":"2024-07-01T15:31:59Z","updated_at":"2026-11-02T14:57:32.670649Z"}],"nvd":[{"id":"CVE-2008-4109","description":"A certain Debian patch for OpenSSH before 4.3p2-9etch3 on etch; before 4.6p1-1 on sid and lenny; and on other distributions such as SUSE uses functions that are not async-signal-safe in the signal handler for login timeouts, which allows remote attackers to cause a denial of service (connection slot exhaustion) via multiple login attempts. NOTE: this issue exists because of an incorrect fix for CVE-2006-5051.","status":"published","published":"2008-09-18T15:04:27.437Z","modified":"2026-06-16T22:57:11.847Z","cvss":[{"version":"2.0","score":5,"vector":"AV:N/AC:L/Au:N/C:N/I:N/A:P","level":"medium","assessor":"primary"}],"cwes":["CWE-264"],"updated_at":"2026-11-02T14:01:28.625777Z"}],"osv":[{"id":"CVE-2008-4109","description":"A certain Debian patch for OpenSSH before 4.3p2-9etch3 on etch; before 4.6p1-1 on sid and lenny; and on other distributions such as SUSE uses functions that are not async-signal-safe in the signal handler for login timeouts, which allows remote attackers to cause a denial of service (connection slot exhaustion) via multiple login attempts. NOTE: this issue exists because of an incorrect fix for CVE-2006-5051.","status":"published","published":"2008-09-18T15:04:27Z","modified":"2026-04-10T03:40:08.105893Z","updated_at":"2026-11-02T15:43:57.452479Z"},{"id":"DEBIAN-CVE-2008-4109","description":"A certain Debian patch for OpenSSH before 4.3p2-9etch3 on etch; before 4.6p1-1 on sid and lenny; and on other distributions such as SUSE uses functions that are not async-signal-safe in the signal handler for login timeouts, which allows remote attackers to cause a denial of service (connection slot exhaustion) via multiple login attempts. NOTE: this issue exists because of an incorrect fix for CVE-2006-5051.","status":"published","published":"2008-09-18T15:04:27.437Z","modified":"2026-10-23T17:47:22.121352586Z","updated_at":"2026-11-02T15:45:23.742363Z"},{"id":"DSA-1638-1","title":"openssh - denial of service","status":"published","published":"2008-09-16T00:00:00Z","modified":"2026-03-09T01:19:08.060067Z","updated_at":"2026-11-02T15:46:14.734124Z"}]}}