CVE-2016-5636

Severity: critical (CVSS 9.8 v3.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 25.5% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2016-09-02 · updated 2026-06-17
Weakness: CWE-190

Description

Integer overflow in the get_data function in zipimport.c in CPython (aka Python) before 2.7.12, 3.x before 3.4.5, and 3.5.x before 3.5.2 allows remote attackers to have unspecified impact via a negative data size value, which triggers a heap-based buffer overflow.

Affected products

Python: through 2.7.11; 3.0, 3.0.1, 3.1.0, 3.1.1, 3.1.2, 3.1.3 (+23)

References

http://lists.opensuse.org/opensuse-security-announce/2020-01/msg00040.html
http://rhn.redhat.com/errata/RHSA-2016-2586.html
http://www.openwall.com/lists/oss-security/2016/06/15/15
http://www.openwall.com/lists/oss-security/2016/06/16/1
http://www.oracle.com/technetwork/topics/security/bulletinjul2016-3090568.html
http://www.securityfocus.com/bid/91247
http://www.securitytracker.com/id/1038138
http://www.splunk.com/view/SP-CAAAPSV
http://www.splunk.com/view/SP-CAAAPUE
https://bugs.python.org/issue26171
https://docs.python.org/3.4/whatsnew/changelog.html#python-3-4-5
https://docs.python.org/3.5/whatsnew/changelog.html#python-3-5-2

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