CVE-2021-4217

LowCVSS 3.3/10Last modified Nov 2, 2026

Description

A flaw was found in unzip. The vulnerability occurs due to improper handling of Unicode strings, which can lead to a null pointer dereference. This flaw allows an attacker to input a specially crafted zip file, leading to a crash or code execution.

Metrics

CVSS 3.1 3.3/10CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L

Weakness enumeration

CWE-476

Affected software

Vendor	Product	Versions
n/a	unzip	unzip 6.0

References

https://access.redhat.com/security/cve/CVE-2021-4217Third Party Advisory
https://bugs.launchpad.net/ubuntu/+source/unzip/+bug/1957077Exploit, Issue Tracking, Patch, Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2044583Exploit, Issue Tracking, Third Party Advisory
https://access.redhat.com/security/cve/CVE-2021-4217Third Party Advisory
https://bugs.launchpad.net/ubuntu/+source/unzip/+bug/1957077Exploit, Issue Tracking, Patch, Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2044583Exploit, Issue Tracking, Third Party Advisory

Timeline

Published: Aug 24, 2022
Last modified: Nov 2, 2026
NVD status: Modified

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