What’s Vulnerable › Vulnerabilities

CVE-2006-6171

• Severity: high (CVSS 7.5 v2.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 9.7% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2006-11-30 · updated 2026-06-16

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

Affected products

• ProFTPD Project Proftpd: through 1.3.0a

References

• http://proftp.cvs.sourceforge.net/proftp/proftpd/src/main.c?r1=1.292&r2=1.293&sortby=date
• http://secunia.com/advisories/23174
• http://secunia.com/advisories/23179
• http://secunia.com/advisories/23184
• http://secunia.com/advisories/23207
• http://secunia.com/advisories/23329
• http://slackware.com/security/viewer.php?l=slackware-security&y=2006&m=slackware-security.502491
• http://www.debian.org/security/2006/dsa-1218
• http://www.debian.org/security/2006/dsa-1222
• http://www.gentoo.org/security/en/glsa/glsa-200611-26.xml
• http://www.mandriva.com/security/advisories?name=MDKSA-2006:217-1
• http://www.openpkg.com/security/advisories/OpenPKG-SA-2006.035.html

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