# CVE-2011-2523

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

- Page: https://www.vulneraibility.com/cve/CVE-2011-2523
- CVSS: 9.8
- Known exploited: not in CISA KEV as of our last sync
- EPSS: 96.18% (percentile 99.9)
- Public exploit code: 2 on Exploit-DB · 1 Metasploit module · 70 GitHub proofs of concept · 1 Nuclei template (first 2011-07-05)
- Published: 2019-11-27

## Affected versions

- vsftpd: affected 2.3.4 downloaded between 20110630 and 20110703

A version outside these ranges is not a statement that it is unaffected.

## References

- [other] https://security-tracker.debian.org/tracker/CVE-2011-2523
- [other] https://access.redhat.com/security/cve/cve-2011-2523
- [other] https://www.openwall.com/lists/oss-security/2011/07/11/5
- [other] https://vigilance.fr/vulnerability/vsftpd-backdoor-in-version-2-3-4-10805
- [other] https://packetstormsecurity.com/files/102745/VSFTPD-2.3.4-Backdoor-Command-Execution.html
- [other] http://packetstormsecurity.com/files/162145/vsftpd-2.3.4-Backdoor-Command-Execution.html

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Summary, impact and action are written by the vulneraibility.com AI analysis pipeline from the CVE record, NVD, CISA and FIRST data; verify against the references.