CVE-2011-2523

Public Exploit

Description

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

Category

9.8
CVSS
Severity: Critical
CVSS 3.1 •
CVSS 2.0 •
EPSS 94.26% Top 5%
Third-Party Advisory redhat.com Third-Party Advisory packetstormsecurity.com Third-Party Advisory debian.org Third-Party Advisory vigilance.fr Third-Party Advisory openwall.com
Affected: vsftpd vsftpd
Published at:
Updated at:

References

Link Tags
https://security-tracker.debian.org/tracker/CVE-2011-2523 third party advisory
https://access.redhat.com/security/cve/cve-2011-2523 third party advisory
https://www.openwall.com/lists/oss-security/2011/07/11/5 third party advisory mailing list
https://vigilance.fr/vulnerability/vsftpd-backdoor-in-version-2-3-4-10805 third party advisory
https://packetstormsecurity.com/files/102745/VSFTPD-2.3.4-Backdoor-Command-Execution.html exploit vdb entry third party advisory
http://packetstormsecurity.com/files/162145/vsftpd-2.3.4-Backdoor-Command-Execution.html

Frequently Asked Questions

What is the severity of CVE-2011-2523?
CVE-2011-2523 has been scored as a critical severity vulnerability.
How to fix CVE-2011-2523?
To fix CVE-2011-2523, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2011-2523 being actively exploited in the wild?
It is possible that CVE-2011-2523 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~94% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2011-2523?
CVE-2011-2523 affects vsftpd vsftpd.
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