CVE-2011-1575
The STARTTLS implementation in ftp_parser.c in Pure-FTPd before 1.0.30 does not properly restrict...
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.
Exploit likelihood
What each source reports
NVD Score used
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.
- Record
CVE-2011-1575- CVSS 2.0
- 5.8 Medium
AV:N/AC:M/Au:N/C:P/I:P/A:N - Weakness
- CWE-399
- Updated
- 2026-11-02
CVE List No score
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.
- Record
CVE-2011-1575- Updated
- 2026-11-02
EUVDEUVD-2011-1576 No score
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.
- Record
EUVD-2011-1576- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-mqpg-5c3p-cx82 No score
The STARTTLS implementation in ftp_parser.c in Pure-FTPd before 1.0.30 does not properly restrict...
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.
- Record
GHSA-mqpg-5c3p-cx82- Updated
- 2026-11-02
OSV No score
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.
- Record
CVE-2011-1575- Updated
- 2026-11-02
OSVDEBIAN-CVE-2011-1575 No score
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.
- Record
DEBIAN-CVE-2011-1575- Updated
- 2026-11-02
Affected products
Affected packages
Public exploits
Links only. Every CVE stores no exploit code.
| Source | Link | Date |
|---|---|---|
| PoC in GitHub | masamoon/cve-2011-1575-poc | 2017-10-17 |
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD, OSV, PoC in GitHub |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2011-1575 is a medium vulnerability (CVSS 5.8) in Pureftpd Pure-ftpd, published May 23, 2011. Public exploit code exists. EPSS puts the chance of exploitation in the next 30 days at 33.3%, the 98th percentile. Fixed in pure-ftpd 1.0.30-1.
References
openwall.com/lists/oss-security/2011/04/11/14
lists.opensuse.org/opensuse-security-announce/2011-05/msg00005.html
bugzilla.redhat.com/show_bug.cgi?id=683221
archives.pureftpd.org/archives.cgi?100:mss:3906:201103:cpeojfkblajnpinkeadd
secunia.com/advisories/43988
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pureftpd.org/project/pure-ftpd/news
bugzilla.novell.com/show_bug.cgi?id=686590
github.com/jedisct1/pure-ftpd/commit/65c4d4ad331e94661de763e9b5304d28698999c4
nvd.nist.gov/vuln/detail/CVE-2011-1575
security-tracker.debian.org/tracker/CVE-2011-1575