CVE-2011-2523
vsftpd: backdoor which opens a shell on port 6200/tcp
Severity
ImportantRed Hat Product Security
CVSS 3.0
Review impact separately from score.
Published · July 4, 2011
Updated · November 22, 2025
Description
vsftpd 2.3.4 downloaded between 20110630 and 20110703 contains a backdoor which opens a shell on port 6200/tcp.
Statement
Not vulnerable. This issue did not affect the versions of vsftpd as shipped with Red Hat Enterprise Linux 3, 4, 5, or 6.
CVSS score applicability
The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.
Mitigation
No mitigation is specified in collected source.
CVSS / CWE
CVSS 3.0 · 8.1CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
CWE-78 · Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')