Backdoor Vulnerability in vsftpd 2.3.4 by Academy of Linux
CVE-2011-2523

9.8CRITICAL

Key Information:

Vendor
vsftpd
Status
vsftpd
Vendor
CVE Published:
27 November 2019

Badges

👾 Exploit Exists🟡 Public PoC🟣 EPSS 94%

Summary

A serious backdoor vulnerability was discovered in vsftpd 2.3.4, affecting downloads made between June 30 and July 3, 2011. This vulnerability allows an attacker to exploit the software and open a remote shell on port 6200/tcp, granting unauthorized access to the system. It poses significant risks to servers using this version of vsftpd, as it can lead to complete system compromise if exploited.

Affected Version(s)

vsftpd 2.3.4 downloaded between 20110630 and 20110703

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2011-2523
Created by padsalatushal

CVE-2011-2523-poc
Created by 4m3rr0r

CVE-2011-2523
Created by cowsecurity

References

https://security-tracker.debian.org/tracker/CVE-2011-2523
x_refsource_MISC
https://access.redhat.com/security/cve/cve-2011-2523
x_refsource_MISC
https://www.openwall.com/lists/oss-security/2011/07/11/5
mailing-listx_refsource_MLIST

EPSS Score

94% chance of being exploited in the next 30 days.

CVSS V3.1

Score:
9.8
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

.