CVE-2011-2523

CriticalCVSS 9.8/10Last modified Jun 16, 2026

Description

vsftpd 2.3.4 downloaded between 20110630 and 20110703 contains a backdoor which opens a shell on port 6200/tcp.

Metrics

CVSS 3.1 9.8/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Weakness enumeration

CWE-78

Affected software

Vendor	Product	Versions
vsftpd	vsftpd	2.3.4 downloaded between 20110630 and 20110703

References

http://packetstormsecurity.com/files/162145/vsftpd-2.3.4-Backdoor-Command-Execution.html
https://access.redhat.com/security/cve/cve-2011-2523Third Party Advisory
https://packetstormsecurity.com/files/102745/VSFTPD-2.3.4-Backdoor-Command-Execution.htmlExploit, Third Party Advisory, VDB Entry
https://security-tracker.debian.org/tracker/CVE-2011-2523Third Party Advisory
https://vigilance.fr/vulnerability/vsftpd-backdoor-in-version-2-3-4-10805Third Party Advisory
https://www.openwall.com/lists/oss-security/2011/07/11/5Mailing List, Third Party Advisory
http://packetstormsecurity.com/files/162145/vsftpd-2.3.4-Backdoor-Command-Execution.html
https://access.redhat.com/security/cve/cve-2011-2523Third Party Advisory
https://packetstormsecurity.com/files/102745/VSFTPD-2.3.4-Backdoor-Command-Execution.htmlExploit, Third Party Advisory, VDB Entry
https://security-tracker.debian.org/tracker/CVE-2011-2523Third Party Advisory
https://vigilance.fr/vulnerability/vsftpd-backdoor-in-version-2-3-4-10805Third Party Advisory
https://www.openwall.com/lists/oss-security/2011/07/11/5Mailing List, Third Party Advisory

Timeline

Published: Nov 27, 2019
Last modified: Jun 16, 2026
NVD status: Modified

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