CVE-2011-2523

CRITICALImmediate

Published:Nov 27, 2019(6 years ago)

Modified:Nov 21, 2024

Remote ExploitNo Auth RequiredNo InteractionLow Complexity

Vulnerability Description

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

Attack Characteristics

Network AccessLow ComplexityNo Auth NeededNo User Interaction

🤖

AI analysis not yet available

Plain-English explanation, risk summary, and remediation steps will appear here once AI analysis is complete.

No Fix Known

No patch has been released yet. Apply workarounds or mitigations where available.

Affected Software

Vendor	Product	Versions	Fixed In
vsftpd_project	vsftpd	-	-
debian	debian_linux	-	-
debian	debian_linux	-

Timeline

Published
CVE disclosed publicly
Nov 27, 20196 years ago
Last Modified
Most recent update
Nov 21, 20241 year ago
Indexed to CVEInsight
Added to this platform
Mar 29, 20261 month ago

References

http://packetstormsecurity.com/files/162145/vsftpd-2.3.4-Backdoor-Comm...
https://access.redhat.com/security/cve/cve-2011-2523Third Party Advisory
https://packetstormsecurity.com/files/102745/VSFTPD-2.3.4-Backdoor-Com...Exploit

CVSS Score

v3.1

9.8/ 10.0

CRITICAL

AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

At a Glance

Affected Products

References

vsftpd_project / vsftpd

https://security-tracker.debian.org/tracker/CVE-2011-2523Third Party Advisory

https://vigilance.fr/vulnerability/vsftpd-backdoor-in-version-2-3-4-10...Third Party Advisory

https://www.openwall.com/lists/oss-security/2011/07/11/5Mailing List

http://packetstormsecurity.com/files/162145/vsftpd-2.3.4-Backdoor-Comm...

https://access.redhat.com/security/cve/cve-2011-2523Third Party Advisory

https://packetstormsecurity.com/files/102745/VSFTPD-2.3.4-Backdoor-Com...Exploit

https://security-tracker.debian.org/tracker/CVE-2011-2523Third Party Advisory

https://vigilance.fr/vulnerability/vsftpd-backdoor-in-version-2-3-4-10...Third Party Advisory

https://www.openwall.com/lists/oss-security/2011/07/11/5Mailing List

CVSS v3 Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

Impact

ScopeUnchanged

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

Impact Analysis

ConfidentialityHigh

NoneLowHigh

IntegrityHigh

NoneLowHigh

AvailabilityHigh

NoneLowHigh

CVE-2011-2523

✦ Vulnerability Description

Attack Characteristics

Affected Software

Timeline

References

CVSS Score

At a Glance

Official Sources

CVSS v3 Vector

Impact Analysis

Vulnerability Description