CVE-2013-7338
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.
Key facts
- CVSS score
- 7.1 (v2.0)
- Severity
- HIGH
- CVSS vector
AV:N/AC:M/Au:N/C:N/I:N/A:C- Weakness (CWE)
- CWE-20
- EPSS score
- 5.1% (92th percentile)
- In CISA KEV
- No
- In EU EUVD
- Yes (EUVD-2013-7111)
- Published
- April 22, 2014
- NVD last modified
- June 17, 2026
- Status
- Modified
EU Vulnerability Database (EUVD)
This vulnerability is also tracked by ENISA as EUVD-2013-7111 in the EU Vulnerability Database. Last updated in EUVD on August 6, 2024.
View on the EU Vulnerability DatabaseAffected products
- apple / mac os x
- python / python
- python / python
- python / python
- python / python
- python / python
- python / python
- python / python
- python / python
- python / python
- python / python
- python / python
- python / python
- python / python
- python / python
- python / python
- python / python
Certified products that may be affected
2 FIPS 140 or Common Criteria certified products, from automated matching by sec-certs.org.
- Apple Mac OS X 10.6 - Apple Inc. - Common Criteria BSI-DSZ-CC-0536-2010 - archived
- Apple Mac OS X v10.3.6 and Apple Mac OS X Server V10.3.6 - Apple Inc. - Common Criteria CCEVS-VR-0086-2005 - archived
References
- http://bugs.python.org/issue20078(Exploit, Patch, Vendor Advisory)
- http://hg.python.org/cpython/rev/79ea4ce431b1(Exploit, Patch, Vendor Advisory)
- http://lists.apple.com/archives/security-announce/2015/Aug/msg00001.html(Mailing List)
- http://lists.opensuse.org/opensuse-updates/2014-05/msg00008.html(Mailing List, Third Party Advisory)
- http://seclists.org/oss-sec/2014/q1/592(Mailing List, Third Party Advisory)
- http://seclists.org/oss-sec/2014/q1/595(Mailing List, Third Party Advisory)
- http://www.securityfocus.com/bid/65179(Third Party Advisory, VDB Entry)
- http://www.securitytracker.com/id/1029973(Third Party Advisory, VDB Entry)
- https://docs.python.org/3.3/whatsnew/changelog.html(Vendor Advisory)
- https://security.gentoo.org/glsa/201503-10(Third Party Advisory)
- https://support.apple.com/kb/HT205031(Patch, Vendor Advisory)
Last updated September 17, 2026 · Source: NVD, CISA KEV, FIRST.org EPSS
Query CVEs from your AI assistant
The CVE/NVD Explorer brain answers CVE questions directly inside Claude, ChatGPT, or any MCP assistant — always up to date, no setup. Add it once and stop pasting advisories into chat.
Add the CVE brain