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 118 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

Python

Updated: 1 week, 2 days ago
0 stars 0 fork 0 watcher
Born at : April 22, 2025, 8:09 a.m. This repo has been linked 3 different CVEs too.

None

Updated: 2 weeks ago
0 stars 0 fork 0 watcher
Born at : April 18, 2025, 9:52 p.m. This repo has been linked 2 different CVEs too.

None

Updated: 1 week, 1 day ago
1 stars 0 fork 0 watcher
Born at : April 15, 2025, 4:40 a.m. This repo has been linked 3 different CVEs too.

Laboratorio técnico de ciberseguridad donde se realiza reconocimiento de red con Nmap y explotación de la vulnerabilidad CVE-2011-2523 (vsftpd 2.3.4) mediante Metasploit Framework. Proyecto académico orientado a demostrar habilidades en análisis de vulnerabilidades, uso de herramientas de pentesting y reporte técnico.

Updated: 2 weeks, 4 days ago
0 stars 0 fork 0 watcher
Born at : April 14, 2025, 4:55 p.m. This repo has been linked 1 different CVEs too.

Cybersecurity lab project: vulnerability assessment in a simulated internal network using Nmap and Nessus. Includes scanning, technical reporting, and incident response.

Updated: 15 hours, 53 minutes ago
0 stars 0 fork 0 watcher
Born at : April 14, 2025, 5:15 a.m. This repo has been linked 2 different CVEs too.

vsFTPd 2.3.4 CVE-2011-2523 PoC

Python

Updated: 2 weeks, 6 days ago
0 stars 0 fork 0 watcher
Born at : April 12, 2025, 12:29 p.m. This repo has been linked 1 different CVEs too.

A VAPT project by Ananya 🐼💻

Updated: 3 weeks, 1 day ago
0 stars 0 fork 0 watcher
Born at : April 10, 2025, 7:43 a.m. This repo has been linked 1 different CVEs too.

Write up of retired HackTheBox machine called Lame.

Updated: 3 weeks, 2 days ago
0 stars 0 fork 0 watcher
Born at : April 10, 2025, 3 a.m. This repo has been linked 2 different CVEs too.

None

Python

Updated: 3 weeks, 5 days ago
0 stars 0 fork 0 watcher
Born at : April 6, 2025, 10:52 a.m. This repo has been linked 1 different CVEs too.

Vulnerability assessment and exploitation of vsftpd 2.3.4 (CVE-2011-2523) using Metasploit. Full report and proof of root access included.

cve cybersecurity exploit ftp metasploit report root-access vapt vsftpd

Updated: 3 weeks, 6 days ago
0 stars 0 fork 0 watcher
Born at : April 5, 2025, 7:39 a.m. This repo has been linked 1 different CVEs too.

A cross-platform Python vulnerability scanner that detects open ports, weak credentials, and CVEs using banner matching. Fast, extensible, and beginner-friendly.

Python

Updated: 4 weeks ago
0 stars 0 fork 0 watcher
Born at : April 4, 2025, 2:09 p.m. This repo has been linked 26 different CVEs too.

None

Updated: 1 week, 3 days ago
0 stars 0 fork 0 watcher
Born at : April 3, 2025, 9:27 p.m. This repo has been linked 1 different CVEs too.

None

Updated: 3 weeks, 5 days ago
1 stars 0 fork 0 watcher
Born at : April 2, 2025, 9:34 a.m. This repo has been linked 1 different CVEs too.

None

Updated: 3 weeks, 3 days ago
0 stars 0 fork 0 watcher
Born at : March 27, 2025, 4:56 p.m. This repo has been linked 4 different CVEs too.

None

Updated: 1 week, 2 days ago
1 stars 0 fork 0 watcher
Born at : March 23, 2025, 3:22 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.

94.26 }} 0.04%

score

0.99921

percentile

CVSS31 - Vulnerability Scoring System
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Latest DB Update: May. 03, 2025 3:19