CVE-2021-4217 - Vulnerability Details - OpenCVE

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.

No CVSS v4.0

Attack Vector Local

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact None

Integrity Impact None

Availability Impact Low

User Interaction Required

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

The EPSS score is 0.00172.

Key SSVC decision points have not yet been added.

Vendors	Products
Fedoraproject	Fedora
Redhat	Enterprise Linux
Unzip Project	Unzip

Configuration 1 [-]

cpe:2.3:a:unzip_project:unzip:6.0:*:*:*:*:*:*:*

Configuration 2 [-]

cpe:2.3:o:fedoraproject:fedora:35:*:*:*:*:*:*:*

Configuration 3 [-]

OR	cpe:2.3:o:redhat:enterprise_linux:6.0:::::::*
	cpe:2.3:o:redhat:enterprise_linux:7.0:::::::*
	cpe:2.3:o:redhat:enterprise_linux:8.0:::::::*
	cpe:2.3:o:redhat:enterprise_linux:9.0:::::::*

No data.

No data.

Advisories

Source	ID	Title
EUVD	EUVD-2021-34075	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.
Ubuntu USN	USN-5673-1	unzip vulnerabilities
Ubuntu USN	USN-7054-1	unzip vulnerability

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References

Link	Providers
https://access.redhat.com/security/cve/CVE-2021-4217
https://bugs.launchpad.net/ubuntu/+source/unzip/+bug/1957077
https://bugzilla.redhat.com/show_bug.cgi?id=2044583
https://nvd.nist.gov/vuln/detail/CVE-2021-4217
https://www.cve.org/CVERecord?id=CVE-2021-4217

History

Wed, 16 Jul 2025 13:45:00 +0000

Type	Values Removed	Values Added
Metrics	epss `{'score': 0.00134}`	epss `{'score': 0.00138}`

MITRE

Status: PUBLISHED

Assigner: redhat

Published: 2022-08-24T15:08:43

Updated: 2024-08-03T17:16:04.487Z

Reserved: 2022-01-27T00:00:00

Link: CVE-2021-4217

Vulnrichment

No data.

NVD

Status : Modified

Published: 2022-08-24T16:15:10.090

Modified: 2024-11-21T06:37:10.350

Link: CVE-2021-4217

Redhat

Severity : Low

Publid Date: 2022-01-14T00:00:00Z

Links: CVE-2021-4217 - Bugzilla

OpenCVE Enrichment

No data.

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