CVE-2013-7338

Name: CVE-2013-7338
Creator: NVD / NIST
Published: 2014-04-22T14:23:34.893+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

UnknownEPSS 5.05%

Last modified Jun 17, 2026

CVE-2013-7338 is a vulnerability of currently unknown severity. 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.. EPSS estimates a 5.05% chance of exploitation in the next 30 days.

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.

Metrics

EPSS Probability

5.05%

91.2th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-20

Affected Software

Vendor	Product	Versions
Python	Python	3.3.0
Python	Python	3.3.1
Python	Python	3.3.2
Python	Python	3.3.3
Apple	Mac Os X	<= 10.10.4

References

http://bugs.python.org/issue20078Exploit, Patch, Vendor Advisory
http://hg.python.org/cpython/rev/79ea4ce431b1Exploit, Patch, Vendor Advisory
http://lists.apple.com/archives/security-announce/2015/Aug/msg00001.htmlMailing List
http://lists.opensuse.org/opensuse-updates/2014-05/msg00008.htmlMailing List, Third Party Advisory
http://seclists.org/oss-sec/2014/q1/592Mailing List, Third Party Advisory
http://seclists.org/oss-sec/2014/q1/595Mailing List, Third Party Advisory
http://www.securityfocus.com/bid/65179Third Party Advisory, VDB Entry
http://www.securitytracker.com/id/1029973Third Party Advisory, VDB Entry
https://docs.python.org/3.3/whatsnew/changelog.htmlVendor Advisory
https://security.gentoo.org/glsa/201503-10Third Party Advisory
https://support.apple.com/kb/HT205031Patch, Vendor Advisory
http://bugs.python.org/issue20078Exploit, Patch, Vendor Advisory
http://hg.python.org/cpython/rev/79ea4ce431b1Exploit, Patch, Vendor Advisory
http://lists.apple.com/archives/security-announce/2015/Aug/msg00001.htmlMailing List
http://lists.opensuse.org/opensuse-updates/2014-05/msg00008.htmlMailing List, Third Party Advisory
http://seclists.org/oss-sec/2014/q1/592Mailing List, Third Party Advisory
http://seclists.org/oss-sec/2014/q1/595Mailing List, Third Party Advisory
http://www.securityfocus.com/bid/65179Third Party Advisory, VDB Entry
http://www.securitytracker.com/id/1029973Third Party Advisory, VDB Entry
https://docs.python.org/3.3/whatsnew/changelog.htmlVendor Advisory
https://security.gentoo.org/glsa/201503-10Third Party Advisory
https://support.apple.com/kb/HT205031Patch, Vendor Advisory

Timeline

Published: Apr 22, 2014
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2013-7338?

How severe is CVE-2013-7338?

Severity scoring for CVE-2013-7338 is pending analysis. The EPSS model estimates a 5.05% probability of exploitation in the next 30 days.

How do I fix CVE-2013-7338?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2013-7338?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST