CVE-2011-2523: OS Command Injection
vsftpd 2.3.4 downloaded between 20110630 and 20110703 contains a backdoor which opens a shell on port 6200/tcp.
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
debian/vsftpdto a version that resolves this vulnerability.Fixed in 3.0.3-12Fixed in 3.0.3-13Fixed in 3.0.5-0.2Fixed in 3.0.5-0.4
Event History
Frequently Asked Questions
What is CVE-2011-2523?
CVE-2011-2523 is a vulnerability in vsftpd 2.3.4 that contains a backdoor which opens a shell on port 6200/tcp.
What is the severity of CVE-2011-2523?
The severity of CVE-2011-2523 is critical, with a severity value of 9.8.
Which software versions are affected by CVE-2011-2523?
vsftpd 2.3.4 and Debian Linux versions 8.0, 9.0, and 10.0 are affected by CVE-2011-2523.
How do I fix CVE-2011-2523 in vsftpd?
To fix CVE-2011-2523 in vsftpd, update to version 3.0.3-12 or 3.0.3-13.
Where can I get more information about CVE-2011-2523?
You can get more information about CVE-2011-2523 from the following sources: [link1](https://security-tracker.debian.org/tracker/CVE-2011-2523), [link2](https://www.openwall.com/lists/oss-security/2011/07/11/5), [link3](https://vigilance.fr/vulnerability/vsftpd-backdoor-in-version-2-3-4-10805).