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    CVE-2011-1575

    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:May 23, 2011
    Last Modified:Apr 11, 2025
    EPS:May 23, 2011
    EPSS Score:0.22184
    CVSS Score:5.8

    Affected Products

    Vendor
    Pureftpd
    Product
    Pure-ftpd

    Exploits

    https://github.com/masamoon/cve-2011-1575-poc

    Common Weakness Enumeration

    No CWE recorded yet

    Common Attack Pattern Enumeration and Classification (CAPEC)

    No CAPEC recorded yet

    Related CVEs

    CVE-2024-48208 (CVSS 8.6) — pure-ftpd before 1.0.52 is vulnerable to Buffer Overflow. There is an out of bounds read in the domlsd() funct…
    CVE-2021-40524 (CVSS 7.5) — In Pure-FTPd before 1.0.50, an incorrect max_filesize quota mechanism in the server allows attackers to upload…
    CVE-2020-35359 (CVSS 7.5) — Pure-FTPd 1.0.48 allows remote attackers to prevent legitimate server use by making enough connections to exce…
    CVE-2020-9274 (CVSS 7.5) — An issue was discovered in Pure-FTPd 1.0.49. An uninitialized pointer vulnerability has been detected in the d…
    CVE-2020-9365 (CVSS 7.5) — An issue was discovered in Pure-FTPd 1.0.49. An out-of-bounds (OOB) read has been detected in the pure_strcmp …
    CVE-2019-20176 (CVSS 7.5) — In Pure-FTPd 1.0.49, a stack exhaustion issue was discovered in the listdir function in ls.c.…
    CVE-2017-12170 (CVSS 9.8) — Downstream version 1.0.46-1 of pure-ftpd as shipped in Fedora was vulnerable to packaging error due to which t…
    CVE-2011-3171 (CVSS 3.6) — Directory traversal vulnerability in pure-FTPd 1.0.22 and possibly other versions, when running on SUSE Linux …
    CVE-2011-0418 (CVSS 4) — The glob implementation in Pure-FTPd before 1.0.32, and in libc in NetBSD 5.1, does not properly expand expres…
    CVE-2011-0988 (CVSS 4.4) — pure-ftpd 1.0.22, as used in SUSE Linux Enterprise Server 10 SP3 and SP4, and Enterprise Desktop 10 SP3 and SP…

    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
    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

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High