PT-2010-4862 · None · Pyftpdlib

Paolo Losi · Published 2010-10-19 · Updated 2022-05-17 · CVE-2010-3494

Positive Technologies (AI Summary)

CVSS v4.0

8.7

High

Base vector

AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

Name of the Vulnerable Software and Affected Versions pyftpdlib versions prior to 0.5.2

Description A race condition in the FTPHandler class in ftpserver.py allows remote attackers to cause a denial of service by establishing and then immediately closing a TCP connection. This leads to the accept function having an unexpected value of None for the address, or an ECONNABORTED, EAGAIN, or EWOULDBLOCK error.

Recommendations For versions prior to 0.5.2, update to version 0.5.2 or later to resolve the issue. As a temporary workaround, consider implementing measures to handle unexpected TCP connection closures and errors to minimize the risk of denial of service.

Fix

Race Condition

Weakness Enumeration

CWE-362

Related Identifiers

CVE-2010-3494

GHSA-HW4G-FHCP-X5MQ

PYSEC-2010-11

Affected Products

Pyftpdlib

References · 23

• http://bugs.python.org/issue6706 · Patch
• https://security-tracker.debian.org/tracker/CVE-2010-3494 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2010-3494 · Vendor Advisory
• https://osv.dev/vulnerability/GHSA-hw4g-fhcp-x5mq · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2010-3494 · Security Note
• https://osv.dev/vulnerability/UBUNTU-CVE-2010-3494 · Vendor Advisory
• https://ubuntu.com/security/CVE-2010-3494 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2010-3494 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2010-3494 · Security Note
• https://osv.dev/vulnerability/PYSEC-2010-11 · Vendor Advisory
• https://github.com/giampaolo/pyftpdlib · Note
• https://github.com/pypa/advisory-database/tree/main/vulns/pyftpdlib/PYSEC-2010-11.yaml · Note
• https://github.com/advisories/GHSA-hw4g-fhcp-x5mq · Note
• http://code.google.com/p/pyftpdlib/source/detail?r=556 · Note
• http://openwall.com/lists/oss-security/2010/09/22/3 · Note