CVE-2009-5011 Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition') in pyftpdlib
Remote attackers can cause a denial of service in pyftpdlib by rapidly opening and closing TCP connections, triggering a race condition.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2009-5011?
CVE-2009-5011 is a medium-severity vulnerability in n/a, published on 19 Oct 2010. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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.
Weakness: CWE-362
Which versions are affected by CVE-2009-5011?
3 open source packages ship an affected version, including pyftpdlib. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
pyftpdlib PyPI | All versions | 0.5.2 |
pyftpdlib PyPI | All versions | 0.5.2 |
pyftpdlib PyPI | All versions | 0.5.2 |
Products include G.rodola Pyftpdlib.
How do I fix CVE-2009-5011?
Upgrade pyftpdlib to 0.5.2 or later.
Is CVE-2009-5011 being exploited?
There is no known exploitation of CVE-2009-5011 in the wild and no public exploit code.
Other vulnerabilities in n/a
Sources
Also known as DEBIAN-CVE-2009-5011, GHSA-62xg-239j-vxg7, PYSEC-2010-8.