CVE-2021-21706 - CVE House
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Status published Medium CVE-2021-21706

ZipArchive::extractTo may extract outside of destination dir

Vulnerability Description

In PHP versions 7.3.x below 7.3.31, 7.4.x below 7.4.24 and 8.0.x below 8.0.11, in Microsoft Windows environment, ZipArchive::extractTo may be tricked into writing a file outside target directory when extracting a ZIP file, thus potentially causing files to be created or overwritten, subject to OS permissions.

Impact Analysis

Refer to official advisory for detailed impact metrics.

Remediation

Ensure systems are updated to the latest vendor-supplied patch levels.

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Credits & Attribution

The following person or organization is credited with identifying this vulnerability, as recorded in the NVD database:

  • reported by vi at hackberry dot xyz

References

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Affected Vendor

Affected Software

PHP
Vulnerable Versions:
7.3.x, 7.4.x, 8.0.X

Timeline

Official Publish: October 4th, 2021
Last Modified: September 16th, 2024
Added to House: July 21st, 2026

CVSS Vectors

V3: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:N

Weaknesses (CWE)

CWE-24

MITRE ATT&CK TTPs

No associated TTPs found for this vulnerability.