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CVE-2011-2523: debian debian_linux OS Command Injection

CVSS: 10.0v2.0HighModified
Published 27-11-2019Last modified 06-08-2024
Open JSON

Vulnerability summary

CVE-2011-2523 is a high (CVSS 10.0) OS Command Injection vulnerability in debian debian_linux. EPSS estimates a 96.18% chance of exploitation in the next 30 days, higher than 99.8% of scored vulnerabilities. 4 public exploits are recorded.

Overall risk
90/100
0100
Critical · default modelHow is this calculated?
CVSS score
10.0/10
010
High · v2.0 (NVD)
EPSS score
96.18%
0%100%
Critical · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits4reference, metasploit, exploit-database

Timeline

  1. 27-11-2019
    PublishedVulnerability first disclosed.
  2. 06-08-2024
    Last modifiedVulnerability information updated.

Description

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

CVSS metrics

2 scores · 1 source · 2 versions

EPSS trend

Probability

96.18%

Chance of exploitation in the next 30 days

Percentile

100%

Versus all other CVEs

30-day change

0.00 pp

From 96.18% on 21-09-2026

21-09-202621-10-2026
EPSS score
96.18%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

4 found
  • referenceUnverified

    Exploit Reference (packetstormsecurity.com)

    Maturity: unknown

  • MetasploitMetasploitremoteVerified

    VSFTPD 2.3.4 Backdoor Command Execution

    exploit/unix/ftp/vsftpd_234_backdoor

    Maturity: weaponized

  • exploit-databaseremoteunixVerified

    vsftpd 2.3.4 - Backdoor Command Execution

    Maturity: weaponized

Show all 4 exploits
  • exploit-databaseremoteunixVerified

    vsftpd 2.3.4 - Backdoor Command Execution (Metasploit)

    Maturity: weaponized

Weaknesses

CWE · root cause

Affected systems

Debian1 product
Vsftpd1 product
  • vsftpd2.3.4 downloaded between 20110630 and 20110703
Vsftpd_project1 product

3 vendors · 3 products

References

6 links