Resource management error in Pure-FTPd - CVE-2011-1575
Published: February 21, 2014 / Updated: June 21, 2025
Vulnerability identifier: #VU111718
CSH Severity: Medium
CVSS v4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2011-1575
CWE-ID: CWE-399
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote non-authenticated attacker to read and manipulate data.
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.
Affected software
Pure-FTPd
Gentoo Linux
net-ftp/pure-ftpd
Gentoo Linux
net-ftp/pure-ftpd
How to mitigate CVE-2011-1575
Install update from vendor's website.
Pure-FTPd - update to 1.0.30
net-ftp/pure-ftpd - update to 1.0.32
net-ftp/pure-ftpd - update to 1.0.32
External References
- http://archives.pureftpd.org/archives.cgi?100:mss:3906:201103:cpeojfkblajnpinkeadd
- http://archives.pureftpd.org/archives.cgi?100:mss:3910:201103:cpeojfkblajnpinkeadd
- 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
- http://secunia.com/advisories/44548
- http://www.pureftpd.org/project/pure-ftpd/news
- https://bugzilla.novell.com/show_bug.cgi?id=686590
- https://bugzilla.redhat.com/show_bug.cgi?id=683221
- https://github.com/jedisct1/pure-ftpd/commit/65c4d4ad331e94661de763e9b5304d28698999c4