CVE-2009-5011
Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition') in pyftpdlib
EPSS 0.44%
Description
Race condition in the FTPHandler class in ftpserver.py in pyftpdlib before 0.5.2 allows remote attackers to cause a denial of service (daemon outage) by establishing and then immediately closing a TCP connection, leading to the getpeername function having an ENOTCONN error, a different vulnerability than CVE-2010-3494.
How to fix CVE-2009-5011
To remediate CVE-2009-5011, upgrade the affected package to a fixed version below.
- Debian/python-pyftpdlib—upgrade to 0.5.2-1 or later
- —upgrade to 0.5.2 or later
- —upgrade to 0.5.2 or later
Is CVE-2009-5011 being exploited?
Low — EPSS is 0.4%, meaning exploitation activity has not been observed at scale.
Affected packages (3)
- from 0, < 0.5.2-1
- from 0, < 0.5.2
- from 0, < 0.5.2
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 4.0 | — | CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N |