CVE-2013-7338

Severity: high (CVSS 7.1 v2.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 5.1% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2014-04-22 · updated 2026-06-17
Weakness: CWE-20

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

macOS: through 10.10.4
Python: 3.3.0, 3.3.0-alpha1, 3.3.0-alpha2, 3.3.0-alpha3, 3.3.0-alpha4, 3.3.0-beta1 (+10)

References

http://bugs.python.org/issue20078
http://hg.python.org/cpython/rev/79ea4ce431b1
http://lists.apple.com/archives/security-announce/2015/Aug/msg00001.html
http://lists.opensuse.org/opensuse-updates/2014-05/msg00008.html
http://seclists.org/oss-sec/2014/q1/592
http://seclists.org/oss-sec/2014/q1/595
http://www.securityfocus.com/bid/65179
http://www.securitytracker.com/id/1029973
https://docs.python.org/3.3/whatsnew/changelog.html
https://security.gentoo.org/glsa/201503-10
https://support.apple.com/kb/HT205031
http://bugs.python.org/issue20078

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