← Vulnerability feed

Vulnerability record · CVE-2013-7338 · published 22 April 2014

CVE-2013-7338: Python improper input validation vulnerability

Python · Python

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.

7.1 CVSS 2.0 High EPSS 5.1% · top 8.0% CWE-20 · Improper input validation
7.1CVSS 2.0 base score
5.1%EPSS exploitation probability, 30 days
NoNot in CISA KEV
2Affected product versions listed by NVD
22References, 4 tagged exploit
17 Jun 2026Last modified by NVD

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.

AV:N/AC:M/Au:N/C:N/I:N/A:C

Affected products

2 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://bugs.python.org/issue20078 ExploitPatchVendor Advisory
http://hg.python.org/cpython/rev/79ea4ce431b1 ExploitPatchVendor 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 ListThird Party Advisory
http://seclists.org/oss-sec/2014/q1/592 Mailing ListThird Party Advisory
http://seclists.org/oss-sec/2014/q1/595 Mailing ListThird Party Advisory
http://www.securityfocus.com/bid/65179 Third Party AdvisoryVDB Entry
http://www.securitytracker.com/id/1029973 Third Party AdvisoryVDB 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 PatchVendor Advisory
http://bugs.python.org/issue20078 ExploitPatchVendor Advisory
http://hg.python.org/cpython/rev/79ea4ce431b1 ExploitPatchVendor 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 ListThird Party Advisory
http://seclists.org/oss-sec/2014/q1/592 Mailing ListThird Party Advisory
http://seclists.org/oss-sec/2014/q1/595 Mailing ListThird Party Advisory
http://www.securityfocus.com/bid/65179 Third Party AdvisoryVDB Entry
http://www.securitytracker.com/id/1029973 Third Party AdvisoryVDB 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 PatchVendor Advisory

Track CVE-2013-7338 inside VULONE

Watch it alongside the ransomware crews, C2 infrastructure and forum chatter that reference it, query it through the API and pull it into your SIEM over TAXII.

Start free Open in platform

Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

9.8CVE-2021-1870Apple WebKit logic flaw allows remote code executionA logic issue in Apple's WebKit was addressed with improved restrictions, affecting macOS Big Sur, Catalina, Mojave, iOS and iPadOS, plus WebKitGTK a…KEVEPSS 7.7%analysed9.8CVE-2021-1871Apple WebKit logic flaw allows remote code executionA logic issue in Apple's WebKit was addressed with improved restrictions. It affects macOS Big Sur, Catalina, Mojave, iOS and iPadOS, and a remote at…KEVEPSS 7.0%analysed9.8CVE-2014-7169GNU Bash environment variable function parsing command injection (Shellshock variant)GNU Bash through 4.3 bash43-025 processes trailing strings after malformed function definitions in environment variable values, allowing command inje…KEVEPSS 100%analysed9.8CVE-2014-6271GNU Bash environment variable command injection (ShellShock)GNU Bash through 4.3 processes trailing strings after function definitions in environment variable values, allowing injected commands to run when Bas…KEVEPSS 100%analysed9.8CVE-2012-1823PHP-CGI query string option injection enables remote code executionPHP versions before 5.3.12 and 5.4.x before 5.4.2, when run as a CGI script (php-cgi), mishandle query strings that lack an equals sign, allowing com…KEVEPSS 100%analysed8.8CVE-2022-2294Google Chrome WebRTC heap buffer overflow via crafted HTML pageCVE-2022-2294 is a heap buffer overflow in the WebRTC component of Google Chrome prior to 103.0.5060.114. A remote attacker can trigger heap corrupti…KEVEPSS 70%analysed8.8CVE-2021-1789Apple WebKit type confusion allows code execution via crafted web contentA type confusion flaw in Apple's WebKit engine was fixed through improved state handling across macOS, iOS, iPadOS, tvOS, watchOS and Safari. Process…KEVEPSS 14%analysed7.8CVE-2021-30713Apple macOS privacy preference bypass via missing authorizationmacOS Big Sur before 11.4 has a permissions validation flaw (CWE-862 missing authorization) that lets a malicious application bypass Privacy preferen…KEVEPSS 7.0%analysed

Source: NIST National Vulnerability Database (record CVE-2013-7338), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.