python: malformed ZIP files could cause 100% CPU usage
Published Apr 22, 2014
7.1
HIGHCVSS 2.0
EPSS 5.05%
Description
Python before 3.3.4 RC1 allows remote attackers to cause a denial of service (infinite loop and CPU consumption) via a file size value larger than the size of the zip file to the (1) ZipExtFile.read, (2) ZipExtFile.read(n), (3) ZipExtFile.readlines, (4) ZipFile.extract, or (5) ZipFile.extractall function.
Affected products
No data.
Configuration 1
- 3.3.0
- 3.3.0
- 3.3.0
- 3.3.0
- 3.3.0
- 3.3.0
- 3.3.0
- 3.3.0
- 3.3.0
- 3.3.0
- 3.3.1
- 3.3.1
- 3.3.2
- 3.3.3
- 3.3.3
- 3.3.3
No data.
Red Hat Enterprise Linux 5
python
Not affected
Red Hat Enterprise Linux 6
python
Not affected
Red Hat Enterprise Linux 7
python
Not affected
Red Hat Software Collections
python27-python
Not affected
Red Hat Software Collections
python33-python
Will not fix
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 5 | python | Not affected | n/a |
| Red Hat Enterprise Linux 6 | python | Not affected | n/a |
| Red Hat Enterprise Linux 7 | python | Not affected | n/a |
| Red Hat Software Collections | python27-python | Not affected | n/a |
| Red Hat Software Collections | python33-python | Will not fix | n/a |
No package ranges for this CVE.
Remediation
Red Hat statement
This issue did not affect the versions of python as shipped with Red Hat Enterprise Linux 5, 6 and 7.
Metrics
No CVSS v4.0 score for this CVE.
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:C
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 | 5.05% (0.05055) | 92.04th | v5 (v2026.06.15) |
| Jun 15, 2026 | 5.05% (0.05055) | 91.18th | v5 (v2026.06.15) |
| Apr 8, 2026 | 7.78% (0.07780) | 91.96th | v4 (v2025.03.14) |
| Aug 18, 2025 | 5.21% (0.05210) | 89.55th | v4 (v2025.03.14) |
| Mar 30, 2025 | 6.33% (0.06331) | 90.03th | v4 (v2025.03.14) |
| Mar 29, 2025 | 9.12% (0.09121) | 87.65th | v4 (v2025.03.14) |
| Mar 17, 2025 | 6.33% (0.06331) | 90.28th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.62% (0.00621) | 79.55th | v3 (v2023.03.01) |
| Apr 4, 2024 | 0.62% (0.00621) | 78.47th | v3 (v2023.03.01) |
| Oct 17, 2023 | 0.62% (0.00621) | 76.47th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.57% (0.00570) | 74.50th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.96% (0.01955) | 78.47th | v2 (v2022.01.01) |
| Apr 1, 2022 | 1.96% (0.01955) | 76.59th | v2 (v2022.01.01) |
| Feb 4, 2022 | 1.96% (0.01955) | 55.71th | v2 (v2022.01.01) |
References (15)
- http://bugs.python.org/issue20078 x_refsource_CONFIRMExploitPatchVendor Advisory
- http://hg.python.org/cpython/rev/79ea4ce431b1 x_refsource_CONFIRMExploitPatchVendor Advisory
- http://lists.apple.com/archives/security-announce/2015/Aug/msg00001.html vendor-advisoryx_refsource_APPLEMailing List
- http://lists.opensuse.org/opensuse-updates/2014-05/msg00008.html vendor-advisoryx_refsource_SUSEMailing ListThird Party Advisory
- http://seclists.org/oss-sec/2014/q1/592 mailing-listx_refsource_MLISTMailing ListThird Party Advisory
- http://seclists.org/oss-sec/2014/q1/595 mailing-listx_refsource_MLISTMailing ListThird Party Advisory
- http://www.securityfocus.com/bid/65179 vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry
- http://www.securitytracker.com/id/1029973 vdb-entryx_refsource_SECTRACKThird Party AdvisoryVDB Entry
- https://access.redhat.com/security/cve/CVE-2013-7338 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1078014 Issue Tracking
- https://docs.python.org/3.3/whatsnew/changelog.html x_refsource_CONFIRMVendor Advisory
- https://nvd.nist.gov/vuln/detail/CVE-2013-7338
- https://security.gentoo.org/glsa/201503-10 vendor-advisoryx_refsource_GENTOOThird Party Advisory
- https://support.apple.com/kb/HT205031 x_refsource_CONFIRMPatchVendor Advisory
- https://www.cve.org/CVERecord?id=CVE-2013-7338
Change history (0)
No recorded changes yet.