Vulnerability Monitor

The vendors, products, and vulnerabilities you care about

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.

Security Impact Summary

CVE-2011-1575 is a security vulnerability that . Impacting 1 product from pureftpd organizations running these solutions should prioritize assessment and patching.

Historical Context

Documented in 2011, this vulnerability occurred amid the cloud computing expansion era, where traditional network perimeter security models were being reevaluated. Organizations were transitioning from isolated infrastructure to interconnected systems, creating new attack surfaces that vulnerabilities like this could exploit.

Published

2011-05-23T22:55:01.207

Last Modified

2025-04-11T00:51:21.963

Status

Deferred

Source

[email protected]

Severity

CVSSv2: 5.8 (MEDIUM)

CVSSv2 Vector

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

Access Vector: NETWORK
Access Complexity: MEDIUM
Authentication: NONE
Confidentiality Impact: PARTIAL
Integrity Impact: PARTIAL
Availability Impact: NONE

Exploitability Score

8.6

Impact Score

4.9

Weaknesses

Type: Primary
CWE-399

Affected Vendors & Products

Type	Vendor	Product	Version/Range	Vulnerable?
Application	pureftpd	pure-ftpd	≤ 1.0.29	Yes
Application	pureftpd	pure-ftpd	0.90	Yes
Application	pureftpd	pure-ftpd	0.91	Yes
Application	pureftpd	pure-ftpd	0.92	Yes
Application	pureftpd	pure-ftpd	0.93	Yes
Application	pureftpd	pure-ftpd	0.94	Yes
Application	pureftpd	pure-ftpd	0.95	Yes
Application	pureftpd	pure-ftpd	0.95-pre1	Yes
Application	pureftpd	pure-ftpd	0.95-pre2	Yes
Application	pureftpd	pure-ftpd	0.95-pre3	Yes
Application	pureftpd	pure-ftpd	0.95-pre4	Yes
Application	pureftpd	pure-ftpd	0.95.1	Yes
Application	pureftpd	pure-ftpd	0.95.2	Yes
Application	pureftpd	pure-ftpd	0.96	Yes
Application	pureftpd	pure-ftpd	0.96.1	Yes
Application	pureftpd	pure-ftpd	0.96pre1	Yes
Application	pureftpd	pure-ftpd	0.97-final	Yes
Application	pureftpd	pure-ftpd	0.97.1	Yes
Application	pureftpd	pure-ftpd	0.97.2	Yes
Application	pureftpd	pure-ftpd	0.97.3	Yes
Application	pureftpd	pure-ftpd	0.97.4	Yes
Application	pureftpd	pure-ftpd	0.97.5	Yes
Application	pureftpd	pure-ftpd	0.97.6	Yes
Application	pureftpd	pure-ftpd	0.97.7	Yes
Application	pureftpd	pure-ftpd	0.97.7pre1	Yes
Application	pureftpd	pure-ftpd	0.97.7pre2	Yes
Application	pureftpd	pure-ftpd	0.97.7pre3	Yes
Application	pureftpd	pure-ftpd	0.97pre1	Yes
Application	pureftpd	pure-ftpd	0.97pre2	Yes
Application	pureftpd	pure-ftpd	0.97pre3	Yes
Application	pureftpd	pure-ftpd	0.97pre4	Yes
Application	pureftpd	pure-ftpd	0.97pre5	Yes
Application	pureftpd	pure-ftpd	0.98-final	Yes
Application	pureftpd	pure-ftpd	0.98.1	Yes
Application	pureftpd	pure-ftpd	0.98.2	Yes
Application	pureftpd	pure-ftpd	0.98.2a	Yes
Application	pureftpd	pure-ftpd	0.98.3	Yes
Application	pureftpd	pure-ftpd	0.98.4	Yes
Application	pureftpd	pure-ftpd	0.98.5	Yes
Application	pureftpd	pure-ftpd	0.98.6	Yes
Application	pureftpd	pure-ftpd	0.98.7	Yes
Application	pureftpd	pure-ftpd	0.98pre1	Yes
Application	pureftpd	pure-ftpd	0.98pre2	Yes
Application	pureftpd	pure-ftpd	0.99	Yes
Application	pureftpd	pure-ftpd	0.99.1	Yes
Application	pureftpd	pure-ftpd	0.99.1a	Yes
Application	pureftpd	pure-ftpd	0.99.1b	Yes
Application	pureftpd	pure-ftpd	0.99.2	Yes
Application	pureftpd	pure-ftpd	0.99.2a	Yes
Application	pureftpd	pure-ftpd	0.99.3	Yes
Application	pureftpd	pure-ftpd	0.99.4	Yes
Application	pureftpd	pure-ftpd	0.99.9	Yes
Application	pureftpd	pure-ftpd	0.99a	Yes
Application	pureftpd	pure-ftpd	0.99b	Yes
Application	pureftpd	pure-ftpd	0.99pre1	Yes
Application	pureftpd	pure-ftpd	0.99pre2	Yes
Application	pureftpd	pure-ftpd	1.0.0	Yes
Application	pureftpd	pure-ftpd	1.0.1	Yes
Application	pureftpd	pure-ftpd	1.0.2	Yes
Application	pureftpd	pure-ftpd	1.0.3	Yes
Application	pureftpd	pure-ftpd	1.0.4	Yes
Application	pureftpd	pure-ftpd	1.0.5	Yes
Application	pureftpd	pure-ftpd	1.0.6	Yes
Application	pureftpd	pure-ftpd	1.0.7	Yes
Application	pureftpd	pure-ftpd	1.0.8	Yes
Application	pureftpd	pure-ftpd	1.0.9	Yes
Application	pureftpd	pure-ftpd	1.0.10	Yes
Application	pureftpd	pure-ftpd	1.0.11	Yes
Application	pureftpd	pure-ftpd	1.0.12	Yes
Application	pureftpd	pure-ftpd	1.0.13a	Yes
Application	pureftpd	pure-ftpd	1.0.14	Yes
Application	pureftpd	pure-ftpd	1.0.15	Yes
Application	pureftpd	pure-ftpd	1.0.16a	Yes
Application	pureftpd	pure-ftpd	1.0.16b	Yes
Application	pureftpd	pure-ftpd	1.0.16c	Yes
Application	pureftpd	pure-ftpd	1.0.17	Yes
Application	pureftpd	pure-ftpd	1.0.17a	Yes
Application	pureftpd	pure-ftpd	1.0.18	Yes
Application	pureftpd	pure-ftpd	1.0.19	Yes
Application	pureftpd	pure-ftpd	1.0.20	Yes
Application	pureftpd	pure-ftpd	1.0.21	Yes
Application	pureftpd	pure-ftpd	1.0.22	Yes
Application	pureftpd	pure-ftpd	1.0.24	Yes
Application	pureftpd	pure-ftpd	1.0.25	Yes
Application	pureftpd	pure-ftpd	1.0.26	Yes
Application	pureftpd	pure-ftpd	1.0.27	Yes
Application	pureftpd	pure-ftpd	1.0.28	Yes

References

http://archives.pureftpd.org/archives.cgi?100:mss:3906:201103:cpeojfkblajnpinkeadd ([email protected])
http://archives.pureftpd.org/archives.cgi?100:mss:3910:201103:cpeojfkblajnpinkeadd Patch ([email protected])
http://lists.opensuse.org/opensuse-security-announce/2011-05/msg00005.html ([email protected])
http://lists.opensuse.org/opensuse-updates/2011-05/msg00029.html ([email protected])
http://openwall.com/lists/oss-security/2011/04/11/14 ([email protected])
http://openwall.com/lists/oss-security/2011/04/11/3 ([email protected])
http://openwall.com/lists/oss-security/2011/04/11/7 ([email protected])
http://openwall.com/lists/oss-security/2011/04/11/8 ([email protected])
http://secunia.com/advisories/43988 Vendor Advisory ([email protected])
http://secunia.com/advisories/44548 ([email protected])
http://www.pureftpd.org/project/pure-ftpd/news ([email protected])
https://bugzilla.novell.com/show_bug.cgi?id=686590 Patch ([email protected])
https://bugzilla.redhat.com/show_bug.cgi?id=683221 ([email protected])
https://github.com/jedisct1/pure-ftpd/commit/65c4d4ad331e94661de763e9b5304d28698999c4 Patch ([email protected])
http://archives.pureftpd.org/archives.cgi?100:mss:3906:201103:cpeojfkblajnpinkeadd (af854a3a-2127-422b-91ae-364da2661108)
http://archives.pureftpd.org/archives.cgi?100:mss:3910:201103:cpeojfkblajnpinkeadd Patch (af854a3a-2127-422b-91ae-364da2661108)
http://lists.opensuse.org/opensuse-security-announce/2011-05/msg00005.html (af854a3a-2127-422b-91ae-364da2661108)
http://lists.opensuse.org/opensuse-updates/2011-05/msg00029.html (af854a3a-2127-422b-91ae-364da2661108)
http://openwall.com/lists/oss-security/2011/04/11/14 (af854a3a-2127-422b-91ae-364da2661108)
http://openwall.com/lists/oss-security/2011/04/11/3 (af854a3a-2127-422b-91ae-364da2661108)
http://openwall.com/lists/oss-security/2011/04/11/7 (af854a3a-2127-422b-91ae-364da2661108)
http://openwall.com/lists/oss-security/2011/04/11/8 (af854a3a-2127-422b-91ae-364da2661108)
http://secunia.com/advisories/43988 Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://secunia.com/advisories/44548 (af854a3a-2127-422b-91ae-364da2661108)
http://www.pureftpd.org/project/pure-ftpd/news (af854a3a-2127-422b-91ae-364da2661108)
https://bugzilla.novell.com/show_bug.cgi?id=686590 Patch (af854a3a-2127-422b-91ae-364da2661108)
https://bugzilla.redhat.com/show_bug.cgi?id=683221 (af854a3a-2127-422b-91ae-364da2661108)
https://github.com/jedisct1/pure-ftpd/commit/65c4d4ad331e94661de763e9b5304d28698999c4 Patch (af854a3a-2127-422b-91ae-364da2661108)

How SecUtils Interprets This CVE

SecUtils normalizes and enriches National Vulnerability Database (NVD) records by standardizing vendor and product identifiers, aggregating vulnerability metadata from both NVD and MITRE sources, and providing structured context for security teams. For pureftpd's affected products, we extract Common Platform Enumeration (CPE) data, Common Weakness Enumeration (CWE) classifications, CVSS severity metrics, and reference data to enable rapid vulnerability prioritization and asset correlation. This record contains no exploit code, proof-of-concept instructions, or attack methodologies—only defensive intelligence necessary for patch management, risk assessment, and security operations.