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CVE-2011-1575

5.8 · MEDIUM

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 sessi…

Published May 23, 2011pureftpdCWE-399EPSS 33.34%

Overview

CVE-2011-1575 is a medium-severity vulnerability affecting pureftpd pure-ftpd. It was published on May 23, 2011 and has a CVSS 2.0 base score of 5.8 (MEDIUM).

This vulnerability has a CVSS 2.0 base score of 5.8, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical 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.

Remediation

Check the references section for vendor advisories and patches from pureftpd. Update pure-ftpd to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

Affected products

VendorProductVersionsStatus
pureftpdpure-ftpd0Affected

References

Refarchives.pureftpd.org/archives.cgi?100:mss:3906:201103:cpeojfkblajnpinkeaddRefarchives.pureftpd.org/archives.cgi?100:mss:3910:201103:cpeojfkblajnpinkeaddReflists.opensuse.org/opensuse-security-announce/2011-05/msg00005.htmlReflists.opensuse.org/opensuse-updates/2011-05/msg00029.htmlRefopenwall.com/lists/oss-security/2011/04/11/14Refopenwall.com/lists/oss-security/2011/04/11/3Refopenwall.com/lists/oss-security/2011/04/11/7Refopenwall.com/lists/oss-security/2011/04/11/8Refsecunia.com/advisories/43988Refsecunia.com/advisories/44548

How CyberStrike helps

Frequently asked questions

What is CVE-2011-1575?

CVE-2011-1575 is a medium-severity vulnerability affecting pureftpd pure-ftpd. It was published on May 23, 2011 and has a CVSS 2.0 base score of 5.8 (MEDIUM).

How severe is CVE-2011-1575?

This vulnerability has a CVSS 2.0 base score of 5.8, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2011-1575?

Check the references section for vendor advisories and patches from pureftpd. Update pure-ftpd to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2011-1575?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2011-1575 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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