{"id":"CVE-2006-6171","aliases":["DEBIAN-CVE-2006-6171","DSA-1218","DSA-1218-1","EUVD-2006-6154","GHSA-fg3g-4994-3829"],"status":"disputed","title":"** DISPUTED **  ProFTPD 1.3.0a and earlier does not properly set the buffer size limit when...","description":"ProFTPD 1.3.0a and earlier does not properly set the buffer size limit when CommandBufferSize is specified in the configuration file, which leads to an off-by-two buffer underflow.  NOTE: in November 2006, the role of CommandBufferSize was originally associated with CVE-2006-5815, but this was an error stemming from a vague initial disclosure.  NOTE: ProFTPD developers dispute this issue, saying that the relevant memory location is overwritten by assignment before further use within the affected function, so this is not a vulnerability","severity":{"version":"2.0","score":7.5,"vector":"AV:N/AC:L/Au:N/C:P/I:P/A:P","level":"high","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-09","score":0.10248,"percentile":0.95717,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"published":"2006-11-21T00:00:00Z","modified":"2026-10-22T23:47:30Z","fixes":[{"ecosystem":"Debian:12","package":"proftpd-dfsg","fixed_in":["1.3.0-13"],"sources":["osv"]},{"ecosystem":"Debian:13","package":"proftpd-dfsg","fixed_in":["1.3.0-13"],"sources":["osv"]},{"ecosystem":"Debian:14","package":"proftpd-dfsg","fixed_in":["1.3.0-13"],"sources":["osv"]},{"ecosystem":"Debian:3.1","package":"proftpd","fixed_in":["1.2.10-15sarge2"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Debian:12","package":"proftpd-dfsg","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.3.0-13"}]}]},{"source":"osv","ecosystem":"Debian:13","package":"proftpd-dfsg","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.3.0-13"}]}]},{"source":"osv","ecosystem":"Debian:14","package":"proftpd-dfsg","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.3.0-13"}]}]},{"source":"osv","ecosystem":"Debian:3.1","package":"proftpd","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.2.10-15sarge2"}]}],"versions":["1.2.10-15","1.2.10-15sarge1","1.2.10-15sarge1.0.1"]}],"products":[{"vendor":"proftpd_project","product":"proftpd"}],"references":[{"url":"http://www.debian.org/security/2006/dsa-1222","tags":["vendor-advisory","x_refsource_DEBIAN","x_transferred","advisory"]},{"url":"http://proftp.cvs.sourceforge.net/proftp/proftpd/src/main.c?r1=1.292\u0026r2=1.293\u0026sortby=date","tags":["x_refsource_MISC","x_transferred","Vendor Advisory","advisory"]},{"url":"http://www.debian.org/security/2006/dsa-1218","tags":["vendor-advisory","x_refsource_DEBIAN","x_transferred","advisory"]},{"url":"http://secunia.com/advisories/23207","tags":["third-party-advisory","x_refsource_SECUNIA","x_transferred","advisory"]},{"url":"http://slackware.com/security/viewer.php?l=slackware-security\u0026y=2006\u0026m=slackware-security.502491","tags":["vendor-advisory","x_refsource_SLACKWARE","x_transferred","web"]},{"url":"http://secunia.com/advisories/23174","tags":["third-party-advisory","x_refsource_SECUNIA","x_transferred","advisory"]},{"url":"http://www.mandriva.com/security/advisories?name=MDKSA-2006:217-1","tags":["vendor-advisory","x_refsource_MANDRIVA","x_transferred","advisory"]},{"url":"http://www.trustix.org/errata/2006/0070","tags":["vendor-advisory","x_refsource_TRUSTIX","x_transferred","web"]},{"url":"http://secunia.com/advisories/23329","tags":["third-party-advisory","x_refsource_SECUNIA","x_transferred","advisory"]},{"url":"https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=214820","tags":["x_refsource_CONFIRM","x_transferred","Vendor Advisory","advisory"]},{"url":"http://secunia.com/advisories/23184","tags":["third-party-advisory","x_refsource_SECUNIA","x_transferred","advisory"]},{"url":"http://secunia.com/advisories/23179","tags":["third-party-advisory","x_refsource_SECUNIA","x_transferred","advisory"]},{"url":"http://www.gentoo.org/security/en/glsa/glsa-200611-26.xml","tags":["vendor-advisory","x_refsource_GENTOO","x_transferred","web"]},{"url":"http://www.openpkg.com/security/advisories/OpenPKG-SA-2006.035.html","tags":["vendor-advisory","x_refsource_OPENPKG","x_transferred","advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2006-6171"},{"url":"https://github.com/advisories/GHSA-fg3g-4994-3829"},{"url":"https://security-tracker.debian.org/tracker/CVE-2006-6171","tags":["advisory"]}],"sources":{"cve":[{"id":"CVE-2006-6171","description":"ProFTPD 1.3.0a and earlier does not properly set the buffer size limit when CommandBufferSize is specified in the configuration file, which leads to an off-by-two buffer underflow.  NOTE: in November 2006, the role of CommandBufferSize was originally associated with CVE-2006-5815, but this was an error stemming from a vague initial disclosure.  NOTE: ProFTPD developers dispute this issue, saying that the relevant memory location is overwritten by assignment before further use within the affected function, so this is not a vulnerability","status":"disputed","published":"2006-11-30T15:00:00Z","modified":"2024-08-07T20:19:34.625Z","updated_at":"2026-11-02T14:33:50.738595Z"}],"euvd":[{"id":"EUVD-2006-6154","description":"ProFTPD 1.3.0a and earlier does not properly set the buffer size limit when CommandBufferSize is specified in the configuration file, which leads to an off-by-two buffer underflow.  NOTE: in November 2006, the role of CommandBufferSize was originally associated with CVE-2006-5815, but this was an error stemming from a vague initial disclosure.  NOTE: ProFTPD developers dispute this issue, saying that the relevant memory location is overwritten by assignment before further use within the affected function, so this is not a vulnerability","status":"published","published":"2006-11-30T15:00:00Z","modified":"2024-08-07T20:19:34Z","updated_at":"2026-11-03T01:15:44.814613Z"}],"ghsa":[{"id":"GHSA-fg3g-4994-3829","title":"** DISPUTED **  ProFTPD 1.3.0a and earlier does not properly set the buffer size limit when...","description":"** DISPUTED **  ProFTPD 1.3.0a and earlier does not properly set the buffer size limit when CommandBufferSize is specified in the configuration file, which leads to an off-by-two buffer underflow.  NOTE: in November 2006, the role of CommandBufferSize was originally associated with CVE-2006-5815, but this was an error stemming from a vague initial disclosure.  NOTE: ProFTPD developers dispute this issue, saying that the relevant memory location is overwritten by assignment before further use within the affected function, so this is not a vulnerability.","status":"published","published":"2022-05-01T07:35:34Z","modified":"2023-01-31T05:02:28Z","updated_at":"2026-11-02T14:48:15.857029Z"}],"nvd":[{"id":"CVE-2006-6171","description":"ProFTPD 1.3.0a and earlier does not properly set the buffer size limit when CommandBufferSize is specified in the configuration file, which leads to an off-by-two buffer underflow.  NOTE: in November 2006, the role of CommandBufferSize was originally associated with CVE-2006-5815, but this was an error stemming from a vague initial disclosure.  NOTE: ProFTPD developers dispute this issue, saying that the relevant memory location is overwritten by assignment before further use within the affected function, so this is not a vulnerability","status":"disputed","published":"2006-11-30T15:28:00Z","modified":"2026-06-16T22:32:36.697Z","cvss":[{"version":"2.0","score":7.5,"vector":"AV:N/AC:L/Au:N/C:P/I:P/A:P","level":"high","assessor":"primary"}],"updated_at":"2026-11-02T14:01:08.546281Z"}],"osv":[{"id":"CVE-2006-6171","description":"ProFTPD 1.3.0a and earlier does not properly set the buffer size limit when CommandBufferSize is specified in the configuration file, which leads to an off-by-two buffer underflow.  NOTE: in November 2006, the role of CommandBufferSize was originally associated with CVE-2006-5815, but this was an error stemming from a vague initial disclosure.  NOTE: ProFTPD developers dispute this issue, saying that the relevant memory location is overwritten by assignment before further use within the affected function, so this is not a vulnerability","status":"published","published":"2006-11-30T15:28:00Z","modified":"2026-04-10T03:38:37.196288Z","updated_at":"2026-11-02T15:43:56.865964Z"},{"id":"DEBIAN-CVE-2006-6171","description":"ProFTPD 1.3.0a and earlier does not properly set the buffer size limit when CommandBufferSize is specified in the configuration file, which leads to an off-by-two buffer underflow.  NOTE: in November 2006, the role of CommandBufferSize was originally associated with CVE-2006-5815, but this was an error stemming from a vague initial disclosure.  NOTE: ProFTPD developers dispute this issue, saying that the relevant memory location is overwritten by assignment before further use within the affected function, so this is not a vulnerability","status":"published","published":"2006-11-30T15:28:00Z","modified":"2026-10-22T23:47:30.698119322Z","updated_at":"2026-11-02T15:45:23.105674Z"},{"id":"DSA-1218","title":"proftpd","status":"withdrawn","published":"2006-11-21T00:00:00Z","modified":"2025-05-26T07:15:14.081568Z","updated_at":"2026-11-02T15:46:14.285228Z"},{"id":"DSA-1218-1","title":"proftpd","status":"published","published":"2006-11-21T00:00:00Z","modified":"2026-03-09T01:01:38.375142Z","updated_at":"2026-11-02T15:46:14.285228Z"}]}}