Critical severity · published Nov 27, 2019
CVE-2011-2523
vsftpd 2.3.4 downloaded between 20110630 and 20110703 contains a backdoor which opens a shell on port 6200/tcp
9.8
CVSS
96.2%
EPSS
No
On KEV
Description
vsftpd 2.3.4 downloaded between 20110630 and 20110703 contains a backdoor which opens a shell on port 6200/tcp.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)96.2% · higher than 100% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
DL
Debian Linux · Debian
8.0; 9.0; 10.0 · source: NVD
VS
Vsftpd · Vsftpd Project
2.3.4 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2011-2523
CVE.org
https://www.cve.org/CVERecord?id=CVE-2011-2523
packetstormsecurity.com
http://packetstormsecurity.com/files/162145/vsftpd-2.3.4-Backdoor-Command-Execution.html
Third Party Advisory
https://access.redhat.com/security/cve/cve-2011-2523
Exploit
https://packetstormsecurity.com/files/102745/VSFTPD-2.3.4-Backdoor-Command-Execution.html
Third Party Advisory
https://security-tracker.debian.org/tracker/CVE-2011-2523
Third Party Advisory
https://vigilance.fr/vulnerability/vsftpd-backdoor-in-version-2-3-4-10805
Mailing List
https://www.openwall.com/lists/oss-security/2011/07/11/5
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