Path traversal in Apache Commons IO - CVE-2021-29425

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Main Vulnerability Database Vulnerabilities #VU52252

Path traversal in Apache Commons IO - CVE-2021-29425

Published: April 15, 2021


Vulnerability identifier: #VU52252
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2021-29425
CWE-ID: CWE-22
Exploitation vector: Remote access
Exploit availability: No public exploit available
Vendor: Apache Foundation
Affected software:
Apache Commons IO

Detailed vulnerability description

The vulnerability allows a remote attacker to perform directory traversal attacks.

The vulnerability exists due to input validation error within the FileNameUtils.normalize method when processing directory traversal sequences, such as "//../foo", or "\..foo". A remote attacker can send a specially crafted request and verify files availability in the parent folder.


How to mitigate CVE-2021-29425

Install update from vendor's website.

Sources