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CVE-2009-5010

16
FAUCET Score

CVE-2009-5010 is a race condition in the FTPHandler class of pyftpdlib versions prior to 0.5.1, allowing remote attackers to cause a denial of service by rapidly establishing and closing TCP connections. With a CVSS score of 4.3, it is a medium-severity vulnerability that can be exploited remotely with medium attack complexity, resulting in a daemon outage. There is no evidence of active exploitation, public exploit code, or significant community discussion surrounding this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
<= 0.5.0CPE matchmatch criteria
cpe:2.3:a:g.rodola:pyftpdlib:*:*:*:*:*:*:*:*
0.1CPE matchmatch criteria
cpe:2.3:a:g.rodola:pyftpdlib:0.1:*:*:*:*:*:*:*
0.1.1CPE matchmatch criteria
cpe:2.3:a:g.rodola:pyftpdlib:0.1.1:*:*:*:*:*:*:*
0.2.0CPE matchmatch criteria
cpe:2.3:a:g.rodola:pyftpdlib:0.2.0:*:*:*:*:*:*:*
0.3.0CPE matchmatch criteria
cpe:2.3:a:g.rodola:pyftpdlib:0.3.0:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

4.3MEDIUM

AV:N/AC:M/Au:N/C:N/I:N/A:P

Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
Access Vector
NETWORK
Access Complexity
MEDIUM
Authentication
NONE
Exploitability Score
8.6
Impact Score
2.9
CvssVersion
2.0

Exploit Intelligence

EPSS Score
1.36%
Probability of exploitation in next 30 days
EPSS Percentile
68.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0136 is in the 39th percentile among its peer group of 19,956 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (1)

pippatch availablevia ghsa
Product: pyftpdlibFixed in: 0.5.1

Vendor Advisories (1)

pipGHSA-mpg6-rgp4-35rrmedium

Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition') in pyftpdlib

May 2, 2022

References

bugs.python.org / issue6706
Patch
code.google.com / p/pyftpdlib/issues/detail
code.google.com / p/pyftpdlib/source/browse/trunk/HISTORY
code.google.com / p/pyftpdlib/source/detail
code.google.com / p/pyftpdlib/source/diff
bugs.launchpad.net / zodb/+bug/135108
openwall.com / lists/oss-security/2010/09/09/6
openwall.com / lists/oss-security/2010/09/11/2
openwall.com / lists/oss-security/2010/09/22/3
openwall.com / lists/oss-security/2010/09/24/3