{"id":"CVE-2011-1575","url":"https://www.cyber-defence.io/tools/cve/CVE-2011-1575","generatedAt":"2026-10-27T19:49:07.196Z","title":"The STARTTLS implementation in ftp_parser.c in Pure-FTPd before 1.0.30 does not properly restrict I/O buffering, which allows man-in-the-middle attackers to insert commands into encrypted FTP sessions by sending a cleartext command that is processed…","description":"The STARTTLS implementation in ftp_parser.c in Pure-FTPd before 1.0.30 does not properly restrict I/O buffering, which allows man-in-the-middle attackers to insert commands into encrypted FTP sessions by sending a cleartext command that is processed after TLS is in place, related to a \"plaintext command injection\" attack, a similar issue to CVE-2011-0411.","published":"2011-05-23T22:55:01.000Z","lastModified":"2026-06-16T23:29:40.000Z","status":"Modified","sourceIdentifier":"secalert@redhat.com","cvss":{"version":"2.0","score":5.8,"severity":"MEDIUM","vector":"AV:N/AC:M/Au:N/C:P/I:P/A:N"},"cwe":["CWE-399"],"affected":["pureftpd/pure-ftpd"],"epss":{"score":0.33341,"percentile":0.98361,"date":"2026-10-26","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"urgent","text":"EPSS puts the probability of exploitation in the next 30 days at 33.3%, higher than 98% of all known CVEs. Patch or mitigate before the next change window."},"changes":[],"references":[{"url":"http://archives.pureftpd.org/archives.cgi?100:mss:3906:201103:cpeojfkblajnpinkeadd","source":"secalert@redhat.com"},{"url":"http://archives.pureftpd.org/archives.cgi?100:mss:3910:201103:cpeojfkblajnpinkeadd","tags":["Patch"],"source":"secalert@redhat.com"},{"url":"http://lists.opensuse.org/opensuse-security-announce/2011-05/msg00005.html","source":"secalert@redhat.com"},{"url":"http://lists.opensuse.org/opensuse-updates/2011-05/msg00029.html","source":"secalert@redhat.com"},{"url":"http://openwall.com/lists/oss-security/2011/04/11/14","source":"secalert@redhat.com"},{"url":"http://openwall.com/lists/oss-security/2011/04/11/3","source":"secalert@redhat.com"},{"url":"http://openwall.com/lists/oss-security/2011/04/11/7","source":"secalert@redhat.com"},{"url":"http://openwall.com/lists/oss-security/2011/04/11/8","source":"secalert@redhat.com"},{"url":"http://secunia.com/advisories/43988","tags":["Vendor Advisory"],"source":"secalert@redhat.com"},{"url":"http://secunia.com/advisories/44548","source":"secalert@redhat.com"},{"url":"http://www.pureftpd.org/project/pure-ftpd/news","source":"secalert@redhat.com"},{"url":"https://bugzilla.novell.com/show_bug.cgi?id=686590","tags":["Patch"],"source":"secalert@redhat.com"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=683221","source":"secalert@redhat.com"},{"url":"https://github.com/jedisct1/pure-ftpd/commit/65c4d4ad331e94661de763e9b5304d28698999c4","tags":["Patch"],"source":"secalert@redhat.com"},{"url":"http://archives.pureftpd.org/archives.cgi?100:mss:3906:201103:cpeojfkblajnpinkeadd","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://archives.pureftpd.org/archives.cgi?100:mss:3910:201103:cpeojfkblajnpinkeadd","tags":["Patch"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://lists.opensuse.org/opensuse-security-announce/2011-05/msg00005.html","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://lists.opensuse.org/opensuse-updates/2011-05/msg00029.html","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://openwall.com/lists/oss-security/2011/04/11/14","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://openwall.com/lists/oss-security/2011/04/11/3","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://openwall.com/lists/oss-security/2011/04/11/7","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://openwall.com/lists/oss-security/2011/04/11/8","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://secunia.com/advisories/43988","tags":["Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://secunia.com/advisories/44548","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.pureftpd.org/project/pure-ftpd/news","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://bugzilla.novell.com/show_bug.cgi?id=686590","tags":["Patch"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=683221","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://github.com/jedisct1/pure-ftpd/commit/65c4d4ad331e94661de763e9b5304d28698999c4","tags":["Patch"],"source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2011-1575","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}