CVE-2011-2523

vsftpd 2.3.4 downloaded between 20110630 and 20110703 contains a backdoor which opens a shell on port 6200/tcp.
OS Command Injection
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTNIST
9.8 CRITICAL
NETWORK
LOW
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
redhatCNA
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CVEADP
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Base Score
CVSS 3.x
EPSS Score
Percentile: 99%
VendorProductVersion
vsftpd_projectvsftpd
2.3.4
debiandebian_linux
8.0
debiandebian_linux
9.0
debiandebian_linux
10.0
𝑥
= Vulnerable software versions
Debian logo
Debian Releases
Debian Product
Codename
vsftpd
bullseye
3.0.3-12
fixed
bookworm
3.0.3-13
fixed
sid
3.0.3-13.1
fixed
trixie
3.0.3-13.1
fixed
Ubuntu logo
Ubuntu Releases
Ubuntu Product
Codename
vsftpd
oneiric
not-affected
natty
not-affected
maverick
not-affected
lucid
not-affected
hardy
not-affected