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CVE-2009-5013

15
FAUCET Score

CVE-2009-5013 describes a memory leak vulnerability in pyftpdlib versions prior to 0.5.2, specifically within the on_dtp_close function of ftpserver.py. This flaw allows authenticated attackers to trigger a denial of service by sending a QUIT command during an active data transfer, leading to excessive memory consumption. With a CVSS score of 4.0 (AV:N/AC:L/Au:S/C:N/I:N/A:P), it is a low-severity vulnerability requiring authentication for exploitation, with the primary impact being system availability. There is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
<= 0.5.1CPE 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

4.0MEDIUM

AV:N/AC:L/Au:S/C:N/I:N/A:P

Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
Access Vector
NETWORK
Access Complexity
LOW
Authentication
SINGLE
Exploitability Score
8.0
Impact Score
2.9
CvssVersion
2.0

Exploit Intelligence

EPSS Score
1.78%
Probability of exploitation in next 30 days
EPSS Percentile
76.0%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0178 is in the 89th percentile among its peer group of 21,958 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.1 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: 0.5.2

Vendor Advisories (1)

pipGHSA-8gv6-x88p-3f6hmedium

Uncontrolled Resource Consumption in pyftpdlib

May 2, 2022

References

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