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Vulnerability record · CVE-2011-1575 · published 23 May 2011

CVE-2011-1575: Pureftpd pure-ftpd vulnerability

Pureftpd · Pure Ftpd

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.

5.8 CVSS 2.0 Medium EPSS 33% · top 1.7% CWE-399 · CWE-399
5.8CVSS 2.0 base score
33%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
28References
16 Jun 2026Last modified by NVD

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.

AV:N/AC:M/Au:N/C:P/I:P/A:N

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://archives.pureftpd.org/archives.cgi?100:mss:3906:201103:cpeojfkblajnpinkeadd
http://archives.pureftpd.org/archives.cgi?100:mss:3910:201103:cpeojfkblajnpinkeadd Patch
http://lists.opensuse.org/opensuse-security-announce/2011-05/msg00005.html
http://lists.opensuse.org/opensuse-updates/2011-05/msg00029.html
http://openwall.com/lists/oss-security/2011/04/11/14
http://openwall.com/lists/oss-security/2011/04/11/3
http://openwall.com/lists/oss-security/2011/04/11/7
http://openwall.com/lists/oss-security/2011/04/11/8
http://secunia.com/advisories/43988 Vendor Advisory
http://secunia.com/advisories/44548
http://www.pureftpd.org/project/pure-ftpd/news
https://bugzilla.novell.com/show_bug.cgi?id=686590 Patch
https://bugzilla.redhat.com/show_bug.cgi?id=683221
https://github.com/jedisct1/pure-ftpd/commit/65c4d4ad331e94661de763e9b5304d28698999c4 Patch
http://archives.pureftpd.org/archives.cgi?100:mss:3906:201103:cpeojfkblajnpinkeadd
http://archives.pureftpd.org/archives.cgi?100:mss:3910:201103:cpeojfkblajnpinkeadd Patch
http://lists.opensuse.org/opensuse-security-announce/2011-05/msg00005.html
http://lists.opensuse.org/opensuse-updates/2011-05/msg00029.html
http://openwall.com/lists/oss-security/2011/04/11/14
http://openwall.com/lists/oss-security/2011/04/11/3
http://openwall.com/lists/oss-security/2011/04/11/7
http://openwall.com/lists/oss-security/2011/04/11/8
http://secunia.com/advisories/43988 Vendor Advisory
http://secunia.com/advisories/44548
http://www.pureftpd.org/project/pure-ftpd/news
https://bugzilla.novell.com/show_bug.cgi?id=686590 Patch
https://bugzilla.redhat.com/show_bug.cgi?id=683221
https://github.com/jedisct1/pure-ftpd/commit/65c4d4ad331e94661de763e9b5304d28698999c4 Patch

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

9.8CVE-2017-12170Pureftpd pure-ftpd vulnerabilityDownstream version 1.0.46-1 of pure-ftpd as shipped in Fedora was vulnerable to packaging error due to which the original configuration was ignored a…EPSS 1.5%8.6CVE-2024-48208Pureftpd pure-ftpd out-of-bounds read vulnerabilitypure-ftpd before 1.0.52 is vulnerable to Buffer Overflow. There is an out of bounds read in the domlsd() function of the ls.c file.EPSS 1.6%7.5CVE-2021-40524Pureftpd pure-ftpd unrestricted file upload vulnerabilityIn Pure-FTPd before 1.0.50, an incorrect max_filesize quota mechanism in the server allows attackers to upload files of unbounded size, which may lea…EPSS 4.3%7.5CVE-2020-35359Pureftpd pure-ftpd allocation without limits vulnerabilityPure-FTPd 1.0.48 allows remote attackers to prevent legitimate server use by making enough connections to exceed the connection limit.EPSS 4.5%7.5CVE-2020-9274Pureftpd pure-ftpd vulnerabilityAn issue was discovered in Pure-FTPd 1.0.49. An uninitialized pointer vulnerability has been detected in the diraliases linked list. When the *lookup…EPSS 6.0%7.5CVE-2020-9365Pureftpd pure-ftpd out-of-bounds read vulnerabilityAn issue was discovered in Pure-FTPd 1.0.49. An out-of-bounds (OOB) read has been detected in the pure_strcmp function in utils.c.EPSS 7.1%7.5CVE-2019-20176Pureftpd pure-ftpd uncontrolled resource consumption vulnerabilityIn Pure-FTPd 1.0.49, a stack exhaustion issue was discovered in the listdir function in ls.c.EPSS 4.4%4.4CVE-2011-0988Pureftpd pure-ftpd permissions and access controls vulnerabilitypure-ftpd 1.0.22, as used in SUSE Linux Enterprise Server 10 SP3 and SP4, and Enterprise Desktop 10 SP3 and SP4, when running OES Netware extensions,…EPSS 0.34%

Source: NIST National Vulnerability Database (record CVE-2011-1575), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.