{"id":"CVE-2006-4434","aliases":["DEBIAN-CVE-2006-4434","DSA-1164","EUVD-2006-4422","GHSA-535c-fwmj-7hhw"],"status":"published","title":"Use-after-free vulnerability in Sendmail before 8.13.8 allows remote attackers to cause a denial...","description":"Use-after-free vulnerability in Sendmail before 8.13.8 allows remote attackers to cause a denial of service (crash) via a long \"header line\", which causes a previously freed variable to be referenced. NOTE: the original developer has disputed the severity of this issue, saying \"The only denial of service that is possible here is to fill up the disk with core dumps if the OS actually generates different core dumps (which is unlikely)... the bug is in the shutdown code (finis()) which leads directly to exit(3), i.e., the process would terminate anyway, no mail delivery or receiption is affected.\"","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":"2026-11-09","score":0.04548,"percentile":0.91645,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-416"],"published":"2006-08-29T00:00:00Z","modified":"2026-10-23T00:00:08Z","fixes":[{"ecosystem":"Debian:12","package":"sendmail","fixed_in":["8.13.8-1"],"sources":["osv"]},{"ecosystem":"Debian:13","package":"sendmail","fixed_in":["8.13.8-1"],"sources":["osv"]},{"ecosystem":"Debian:14","package":"sendmail","fixed_in":["8.13.8-1"],"sources":["osv"]},{"ecosystem":"Debian:3.1","package":"sendmail","fixed_in":["8.13.4-3sarge3"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Debian:12","package":"sendmail","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"8.13.8-1"}]}]},{"source":"osv","ecosystem":"Debian:13","package":"sendmail","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"8.13.8-1"}]}]},{"source":"osv","ecosystem":"Debian:14","package":"sendmail","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"8.13.8-1"}]}]},{"source":"osv","ecosystem":"Debian:3.1","package":"sendmail","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"8.13.4-3sarge3"}]}],"versions":["8.13.4-3","8.13.4-3sarge1","8.13.4-3sarge2"]}],"products":[{"vendor":"sendmail","product":"sendmail"}],"references":[{"url":"http://www.openbsd.org/errata.html#sendmail3","tags":["vendor-advisory","x_refsource_OPENBSD","x_transferred","Release Notes","advisory"]},{"url":"http://www.attrition.org/pipermail/vim/2006-August/000999.html","tags":["mailing-list","x_refsource_VIM","x_transferred","Mailing List","article"]},{"url":"http://securitytracker.com/id?1016753","tags":["vdb-entry","x_refsource_SECTRACK","x_transferred","Broken Link","Patch","Third Party Advisory","VDB Entry","advisory","fix","web"]},{"url":"http://secunia.com/advisories/21637","tags":["third-party-advisory","x_refsource_SECUNIA","x_transferred","Broken Link","Patch","Vendor Advisory","advisory","fix"]},{"url":"http://www.vupen.com/english/advisories/2006/3994","tags":["vdb-entry","x_refsource_VUPEN","x_transferred","Broken Link","Vendor Advisory","advisory"]},{"url":"http://www.osvdb.org/28193","tags":["vdb-entry","x_refsource_OSVDB","x_transferred","Broken Link","web"]},{"url":"http://secunia.com/advisories/21749","tags":["third-party-advisory","x_refsource_SECUNIA","x_transferred","Broken Link","Vendor Advisory","advisory"]},{"url":"http://secunia.com/advisories/21700","tags":["third-party-advisory","x_refsource_SECUNIA","x_transferred","Broken Link","Vendor Advisory","advisory"]},{"url":"http://www.debian.org/security/2006/dsa-1164","tags":["vendor-advisory","x_refsource_DEBIAN","x_transferred","Broken Link","advisory"]},{"url":"http://secunia.com/advisories/21641","tags":["third-party-advisory","x_refsource_SECUNIA","x_transferred","Broken Link","Patch","Vendor Advisory","advisory","fix"]},{"url":"http://www.sendmail.org/releases/8.13.8.html","tags":["x_refsource_CONFIRM","x_transferred","Release Notes","advisory"]},{"url":"http://www.vupen.com/english/advisories/2006/3393","tags":["vdb-entry","x_refsource_VUPEN","x_transferred","Broken Link","Vendor Advisory","advisory"]},{"url":"http://www.mandriva.com/security/advisories?name=MDKSA-2006:156","tags":["vendor-advisory","x_refsource_MANDRIVA","x_transferred","Broken Link","advisory"]},{"url":"http://www.securityfocus.com/bid/19714","tags":["vdb-entry","x_refsource_BID","x_transferred","Broken Link","Patch","Third Party Advisory","VDB Entry","advisory","fix","web"]},{"url":"http://www.novell.com/linux/security/advisories/2006_21_sr.html","tags":["vendor-advisory","x_refsource_SUSE","x_transferred","Broken Link","advisory"]},{"url":"http://sunsolve.sun.com/search/document.do?assetkey=1-26-102664-1","tags":["vendor-advisory","x_refsource_SUNALERT","x_transferred","Broken Link","web"]},{"url":"http://secunia.com/advisories/22369","tags":["third-party-advisory","x_refsource_SECUNIA","x_transferred","Broken Link","Vendor Advisory","advisory"]},{"url":"http://www.openbsd.org/errata38.html#sendmail3","tags":["vendor-advisory","x_refsource_OPENBSD","x_transferred","Third Party Advisory","advisory"]},{"url":"http://secunia.com/advisories/21696","tags":["third-party-advisory","x_refsource_SECUNIA","x_transferred","Broken Link","Vendor Advisory","advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2006-4434"},{"url":"https://github.com/advisories/GHSA-535c-fwmj-7hhw"},{"url":"https://security-tracker.debian.org/tracker/CVE-2006-4434","tags":["advisory"]}],"sources":{"cve":[{"id":"CVE-2006-4434","description":"Use-after-free vulnerability in Sendmail before 8.13.8 allows remote attackers to cause a denial of service (crash) via a long \"header line\", which causes a previously freed variable to be referenced. NOTE: the original developer has disputed the severity of this issue, saying \"The only denial of service that is possible here is to fill up the disk with core dumps if the OS actually generates different core dumps (which is unlikely)... the bug is in the shutdown code (finis()) which leads directly to exit(3), i.e., the process would terminate anyway, no mail delivery or receiption is affected.\"","status":"published","published":"2006-08-29T00:00:00Z","modified":"2024-08-07T19:06:07.644Z","updated_at":"2026-11-02T14:33:51.085765Z"}],"euvd":[{"id":"EUVD-2006-4422","description":"Use-after-free vulnerability in Sendmail before 8.13.8 allows remote attackers to cause a denial of service (crash) via a long \"header line\", which causes a previously freed variable to be referenced. NOTE: the original developer has disputed the severity of this issue, saying \"The only denial of service that is possible here is to fill up the disk with core dumps if the OS actually generates different core dumps (which is unlikely)... the bug is in the shutdown code (finis()) which leads directly to exit(3), i.e., the process would terminate anyway, no mail delivery or receiption is affected.\"","status":"published","published":"2006-08-29T00:00:00Z","modified":"2024-08-07T19:06:07Z","updated_at":"2026-11-03T01:15:52.149607Z"}],"ghsa":[{"id":"GHSA-535c-fwmj-7hhw","title":"Use-after-free vulnerability in Sendmail before 8.13.8 allows remote attackers to cause a denial...","description":"Use-after-free vulnerability in Sendmail before 8.13.8 allows remote attackers to cause a denial of service (crash) via a long \"header line\", which causes a previously freed variable to be referenced. NOTE: the original developer has disputed the severity of this issue, saying \"The only denial of service that is possible here is to fill up the disk with core dumps if the OS actually generates different core dumps (which is unlikely)... the bug is in the shutdown code (finis()) which leads directly to exit(3), i.e., the process would terminate anyway, no mail delivery or receiption is affected.\"","status":"published","published":"2022-05-01T07:18:27Z","modified":"2026-03-23T05:08:55Z","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-416"],"updated_at":"2026-11-02T15:06:47.740951Z"}],"nvd":[{"id":"CVE-2006-4434","description":"Use-after-free vulnerability in Sendmail before 8.13.8 allows remote attackers to cause a denial of service (crash) via a long \"header line\", which causes a previously freed variable to be referenced. NOTE: the original developer has disputed the severity of this issue, saying \"The only denial of service that is possible here is to fill up the disk with core dumps if the OS actually generates different core dumps (which is unlikely)... the bug is in the shutdown code (finis()) which leads directly to exit(3), i.e., the process would terminate anyway, no mail delivery or receiption is affected.\"","status":"published","published":"2006-08-29T00:04:00Z","modified":"2026-06-16T22:29:05.55Z","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-416"],"updated_at":"2026-11-02T14:01:05.928789Z"}],"osv":[{"id":"CVE-2006-4434","description":"Use-after-free vulnerability in Sendmail before 8.13.8 allows remote attackers to cause a denial of service (crash) via a long \"header line\", which causes a previously freed variable to be referenced. NOTE: the original developer has disputed the severity of this issue, saying \"The only denial of service that is possible here is to fill up the disk with core dumps if the OS actually generates different core dumps (which is unlikely)... the bug is in the shutdown code (finis()) which leads directly to exit(3), i.e., the process would terminate anyway, no mail delivery or receiption is affected.\"","status":"published","published":"2006-08-29T00:04:00Z","modified":"2026-04-10T03:37:45.127905Z","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":"2026-11-02T15:43:56.865964Z"},{"id":"DEBIAN-CVE-2006-4434","description":"Use-after-free vulnerability in Sendmail before 8.13.8 allows remote attackers to cause a denial of service (crash) via a long \"header line\", which causes a previously freed variable to be referenced. NOTE: the original developer has disputed the severity of this issue, saying \"The only denial of service that is possible here is to fill up the disk with core dumps if the OS actually generates different core dumps (which is unlikely)... the bug is in the shutdown code (finis()) which leads directly to exit(3), i.e., the process would terminate anyway, no mail delivery or receiption is affected.\"","status":"published","published":"2006-08-29T00:04:00Z","modified":"2026-10-23T00:00:08.559658772Z","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":"2026-11-02T15:45:23.105674Z"},{"id":"DSA-1164","title":"sendmail - programming error","status":"published","published":"2006-08-31T00:00:00Z","modified":"2026-03-09T01:00:57.309934Z","updated_at":"2026-11-02T15:46:14.285228Z"}]}}