CVE-2011-1575

Severity: medium (CVSS 5.8 v2.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 33.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2011-05-23 · updated 2026-06-16
Weakness: CWE-399

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.

Affected products

Pureftpd Pure-Ftpd: through 1.0.29; 0.90, 0.91, 0.92, 0.93, 0.94, 0.95 (+80)

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

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