Race condition in the FTPHandler class in ftpserver.py in pyftpdlib before 0.5.1 allows remote attackers to cause a denial of service (daemon outage) by establishing and then immediately closing a TCP connection, leading to the accept function having an unexpected return value of None, a different vulnerability than CVE-2010-3494
Published Oct 19, 2010
6.3
MEDIUMCVSS 4.0
EPSS 1.36%
Description
Race condition in the FTPHandler class in ftpserver.py in pyftpdlib before 0.5.1 allows remote attackers to cause a denial of service (daemon outage) by establishing and then immediately closing a TCP connection, leading to the accept function having an unexpected return value of None, a different vulnerability than CVE-2010-3494.
Affected products
No data.
No data.
No Red Hat product state for this CVE.
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
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
No CVSS v3.1 score for this CVE.
No CVSS v3.0 score for this CVE.
AV:N/AC:M/Au:N/C:N/I:N/A:P
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
2022–2026- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (14 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 1.36% (0.01364) | 70.79th | v5 (v2026.06.15) |
| Jun 15, 2026 | 1.36% (0.01364) | 68.10th | v5 (v2026.06.15) |
| Mar 17, 2025 | 1.04% (0.01038) | 75.87th | v4 (v2025.03.14) |
| Dec 12, 2024 | 5.33% (0.05333) | 93.38th | v3 (v2023.03.01) |
| Sep 17, 2024 | 5.33% (0.05333) | 93.24th | v3 (v2023.03.01) |
| May 24, 2024 | 1.88% (0.01880) | 88.43th | v3 (v2023.03.01) |
| May 10, 2024 | 1.59% (0.01586) | 87.27th | v3 (v2023.03.01) |
| Apr 25, 2024 | 1.34% (0.01345) | 85.92th | v3 (v2023.03.01) |
| Mar 15, 2024 | 1.28% (0.01283) | 85.42th | v3 (v2023.03.01) |
| Feb 8, 2024 | 1.08% (0.01080) | 83.83th | v3 (v2023.03.01) |
| Mar 7, 2023 | 5.33% (0.05333) | 91.86th | v3 (v2023.03.01) |
| Mar 6, 2023 | 2.17% (0.02172) | 80.77th | v2 (v2022.01.01) |
| Apr 1, 2022 | 2.17% (0.02172) | 78.91th | v2 (v2022.01.01) |
| Feb 4, 2022 | 2.17% (0.02172) | 57.73th | v2 (v2022.01.01) |
References (13)
- http://bugs.python.org/issue6706 x_refsource_MISCPatch
- http://code.google.com/p/pyftpdlib/issues/detail?id=91 x_refsource_CONFIRM
- http://code.google.com/p/pyftpdlib/source/browse/trunk/HISTORY x_refsource_CONFIRM
- http://code.google.com/p/pyftpdlib/source/detail?r=439 x_refsource_CONFIRM
- http://code.google.com/p/pyftpdlib/source/diff?spec=svn439&r=439&format=side&path=/trunk/pyftpdlib/ftpserver.py x_refsource_CONFIRM
- http://www.openwall.com/lists/oss-security/2010/09/09/6 mailing-listx_refsource_MLIST
- http://www.openwall.com/lists/oss-security/2010/09/11/2 mailing-listx_refsource_MLIST
- http://www.openwall.com/lists/oss-security/2010/09/22/3 mailing-listx_refsource_MLIST
- http://www.openwall.com/lists/oss-security/2010/09/24/3 mailing-listx_refsource_MLIST
- https://bugs.launchpad.net/zodb/+bug/135108 x_refsource_MISC
- https://github.com/advisories/GHSA-mpg6-rgp4-35rr Advisory
- https://github.com/pypa/advisory-database/tree/main/vulns/pyftpdlib/PYSEC-2010-7.yaml
- https://nvd.nist.gov/vuln/detail/CVE-2009-5010
Change history (0)
No recorded changes yet.