CVE-2011-2523
Vsftpd Backdoor Shell Access
Description
vsftpd 2.3.4 downloaded between 20110630 and 20110703 contains a backdoor which opens a shell on port 6200/tcp.
INFO
Published Date :
Nov. 27, 2019, 9:15 p.m.
Last Modified :
Nov. 21, 2024, 1:28 a.m.
Remotely Exploit :
Yes !
Source :
[email protected]
Affected Products
The following products are affected by CVE-2011-2523
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 2.0 | HIGH | [email protected] | ||||
| CVSS 3.1 | CRITICAL | [email protected] |
Public PoC/Exploit Available at Github
CVE-2011-2523 has a 774 public
PoC/Exploit available at Github.
Go to the Public Exploits tab to see the list.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2011-2523.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2011-2523 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2011-2523
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Internal penetration test of a Metasploitable2 Linux server (ethical hacking capstone).
A full internal penetration test of Metasploitable2 covering information gathering, password auditing, vulnerability assessment, and social engineering simulation. Conducted using Kali Linux, Nmap, John the Ripper, Metasploit, and the Social-Engineer Toolkit (SET) as part of the ParoCyber Ethical Hacking Capstone Project.
A Python-based network vulnerability scanner that automates host discovery, port scanning, service enumeration, and vulnerability assessment using Nmap. Designed to streamline network reconnaissance and security analysis in lab environments.
Python HTML
Hands-on network security lab portfolio — reconnaissance, Metasploit exploitation, and SQL injection testing using Kali Linux, Nmap, and DVWA in isolated VMware environments.
None
None
None
Penetration testing lab — vulnerability analysis on Metasploitable 2 using Nmap, Wireshark and Metasploit
cve-2011-2523 cybersecurity ethical-hacking kali-linux metasploit nmap penetration-testing wireshark
Enterprise network penetration testing and hardening - exploitation of vsftpd backdoor, PHP CGI injection, and DNS amplification with full remediation.
Full network/system penetration test of Metasploitable 2 — recon → root compromise (Samba RCE, ingreslock, MySQL/PostgreSQL default creds) → post-exploitation, with reports, per-finding write-ups, ATT&CK mapping, and blue-team Sigma detection rules.
detection-engineering ethical-hacking metasploit metasploitable2 mitre-attack network-security penetration-testing privilege-escalation sigma-rules vapt
A structured 12-week red team engagement documenting every phase of a real-world attack — reconnaissance, exploitation, privilege escalation, lateral movement, Active Directory domination, post-engagement cleanup, and executive-level reporting with CVSS scoring and MITRE ATT&CK framework mapping.
None
Nmap vulnerability assessment of Metasploitable2 Linux lab. Mapped exploits to MITRE ATT&CK T1190, T1059.004, T1021.001 with CVE analysis and SOC remediation steps.
Penetration test against Metasploitable 2 vsFTPd backdoor exploitation, root Meterpreter session, manual hash extraction and password cracking with John the Ripper.
None
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2011-2523 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2011-2523 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Modified by af854a3a-2127-422b-91ae-364da2661108
Nov. 21, 2024
Action Type Old Value New Value Added Reference http://packetstormsecurity.com/files/162145/vsftpd-2.3.4-Backdoor-Command-Execution.html Added Reference https://access.redhat.com/security/cve/cve-2011-2523 Added Reference https://packetstormsecurity.com/files/102745/VSFTPD-2.3.4-Backdoor-Command-Execution.html Added Reference https://security-tracker.debian.org/tracker/CVE-2011-2523 Added Reference https://vigilance.fr/vulnerability/vsftpd-backdoor-in-version-2-3-4-10805 Added Reference https://www.openwall.com/lists/oss-security/2011/07/11/5 -
CVE Modified by [email protected]
May. 14, 2024
Action Type Old Value New Value -
CVE Modified by [email protected]
Apr. 12, 2021
Action Type Old Value New Value Added Reference http://packetstormsecurity.com/files/162145/vsftpd-2.3.4-Backdoor-Command-Execution.html [No Types Assigned] -
CPE Deprecation Remap by [email protected]
Aug. 18, 2020
Action Type Old Value New Value Changed CPE Configuration OR *cpe:2.3:o:debian:debian_linux:10:*:*:*:*:*:*:* OR *cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:* -
Initial Analysis by [email protected]
Dec. 16, 2019
Action Type Old Value New Value Added CVSS V2 NIST (AV:N/AC:L/Au:N/C:C/I:C/A:C) Added CVSS V3.1 NIST AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Changed Reference Type https://access.redhat.com/security/cve/cve-2011-2523 No Types Assigned https://access.redhat.com/security/cve/cve-2011-2523 Third Party Advisory Changed Reference Type https://packetstormsecurity.com/files/102745/VSFTPD-2.3.4-Backdoor-Command-Execution.html No Types Assigned https://packetstormsecurity.com/files/102745/VSFTPD-2.3.4-Backdoor-Command-Execution.html Exploit, Third Party Advisory, VDB Entry Changed Reference Type https://security-tracker.debian.org/tracker/CVE-2011-2523 No Types Assigned https://security-tracker.debian.org/tracker/CVE-2011-2523 Third Party Advisory Changed Reference Type https://vigilance.fr/vulnerability/vsftpd-backdoor-in-version-2-3-4-10805 No Types Assigned https://vigilance.fr/vulnerability/vsftpd-backdoor-in-version-2-3-4-10805 Third Party Advisory Changed Reference Type https://www.openwall.com/lists/oss-security/2011/07/11/5 No Types Assigned https://www.openwall.com/lists/oss-security/2011/07/11/5 Mailing List, Third Party Advisory Added CWE NIST CWE-78 Added CPE Configuration OR *cpe:2.3:a:vsftpd_project:vsftpd:2.3.4:*:*:*:*:*:*:* Added CPE Configuration OR *cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:* *cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* *cpe:2.3:o:debian:debian_linux:10:*:*:*:*:*:*:*