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CVE-2006-6171

7.5 · HIGH

ProFTPD 1.3.0a and earlier does not properly set the buffer size limit when CommandBufferSize is specified in the configuration file, which leads to an off-by-two buffer underflow.

Published Nov 30, 2006proftpd_projectEPSS 9.66%

Overview

CVE-2006-6171 is a high-severity vulnerability affecting proftpd_project proftpd. It was published on November 30, 2006 and has a CVSS 2.0 base score of 7.5 (HIGH).

This vulnerability has a CVSS 2.0 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

ProFTPD 1.3.0a and earlier does not properly set the buffer size limit when CommandBufferSize is specified in the configuration file, which leads to an off-by-two buffer underflow. NOTE: in November 2006, the role of CommandBufferSize was originally associated with CVE-2006-5815, but this was an error stemming from a vague initial disclosure. NOTE: ProFTPD developers dispute this issue, saying that the relevant memory location is overwritten by assignment before further use within the affected function, so this is not a vulnerability

Remediation

Check the references section for vendor advisories and patches from proftpd_project. Update proftpd 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
proftpd_projectproftpd0Affected

References

Refproftp.cvs.sourceforge.net/proftp/proftpd/src/main.c?r1=1.292&r2=1.293&sortby=dateRefsecunia.com/advisories/23174Refsecunia.com/advisories/23179Refsecunia.com/advisories/23184Refsecunia.com/advisories/23207Refsecunia.com/advisories/23329Refslackware.com/security/viewer.php?l=slackware-security&y=2006&m=slackware-security.502491Refwww.debian.org/security/2006/dsa-1218Refwww.debian.org/security/2006/dsa-1222Refwww.gentoo.org/security/en/glsa/glsa-200611-26.xml

How CyberStrike helps

Frequently asked questions

What is CVE-2006-6171?

CVE-2006-6171 is a high-severity vulnerability affecting proftpd_project proftpd. It was published on November 30, 2006 and has a CVSS 2.0 base score of 7.5 (HIGH).

How severe is CVE-2006-6171?

This vulnerability has a CVSS 2.0 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2006-6171?

Check the references section for vendor advisories and patches from proftpd_project. Update proftpd 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-2006-6171?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2006-6171 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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