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 Exploitable :

Yes !

Impact Score :

5.9

Exploitability Score :

3.9
Public PoC/Exploit Available at Github

CVE-2011-2523 has a 174 public PoC/Exploit available at Github. Go to the Public Exploits tab to see the list.

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.

ID Vendor Product Action
1 Debian debian_linux
1 Vsftpd_project vsftpd

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).

None

Updated: 1 day, 16 hours ago
0 stars 0 fork 0 watcher
Born at : May 23, 2025, 4:42 a.m. This repo has been linked 3 different CVEs too.

None

Python

Updated: 2 days, 8 hours ago
0 stars 0 fork 0 watcher
Born at : May 22, 2025, 12:10 p.m. This repo has been linked 1 different CVEs too.

None

Updated: 3 days, 6 hours ago
0 stars 0 fork 0 watcher
Born at : May 21, 2025, 2:12 p.m. This repo has been linked 2 different CVEs too.

None

Updated: 4 days ago
0 stars 0 fork 0 watcher
Born at : May 20, 2025, 8:37 p.m. This repo has been linked 2 different CVEs too.

None

Updated: 4 days ago
0 stars 0 fork 0 watcher
Born at : May 20, 2025, 8:32 p.m. This repo has been linked 2 different CVEs too.

None

Updated: 4 days, 2 hours ago
0 stars 0 fork 0 watcher
Born at : May 20, 2025, 5:56 p.m. This repo has been linked 2 different CVEs too.

None

Updated: 4 days, 5 hours ago
0 stars 0 fork 0 watcher
Born at : May 20, 2025, 3:10 p.m. This repo has been linked 2 different CVEs too.

None

Updated: 4 days, 4 hours ago
0 stars 0 fork 0 watcher
Born at : May 20, 2025, 1:46 p.m. This repo has been linked 1 different CVEs too.

None

Updated: 4 days, 13 hours ago
0 stars 0 fork 0 watcher
Born at : May 20, 2025, 7:51 a.m. This repo has been linked 2 different CVEs too.

None

Updated: 4 days, 14 hours ago
0 stars 0 fork 0 watcher
Born at : May 20, 2025, 6:07 a.m. This repo has been linked 2 different CVEs too.

This project is based on performing penetration testing in a controlled lab environment to simulate attacks that hackers may use to exploit real systems. Using Kali Linux as the attack platform and Metasploitable as the vulnerable target system.

Updated: 4 days, 14 hours ago
0 stars 0 fork 0 watcher
Born at : May 20, 2025, 6:04 a.m. This repo has been linked 2 different CVEs too.

This project involves performing in-depth network penetration testing using real-world exploits to assess and enhance the security of a simulated enterprise network. Aligned with the objectives of the Certified Ethical Hacker (CEH) certification, the project aims to replicate the approach of malicious attackers in order to uncover vulnerability.

Updated: 4 days, 16 hours ago
0 stars 0 fork 0 watcher
Born at : May 20, 2025, 4:16 a.m. This repo has been linked 2 different CVEs too.

This project is related about Network Penetration Testing with Real-World Exploits and Security Remediation

Updated: 5 days, 2 hours ago
0 stars 0 fork 0 watcher
Born at : May 19, 2025, 6:08 p.m. This repo has been linked 2 different CVEs too.

None

Updated: 5 days, 2 hours ago
0 stars 0 fork 0 watcher
Born at : May 19, 2025, 6:02 p.m. This repo has been linked 2 different CVEs too.

None

Updated: 5 days, 2 hours ago
0 stars 0 fork 0 watcher
Born at : May 19, 2025, 5:56 p.m. This repo has been linked 2 different CVEs too.

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:*:*:*:*:*:*:*
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
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)

Exploit Prediction

EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.

94.23 }} -0.04%

score

0.99914

percentile

CVSS31 - Vulnerability Scoring System
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Latest DB Update: May. 24, 2025 20:57