CVE-2021-29425

Publication date 13 April 2021

Last updated 18 August 2025

Ubuntu priority

Cvss 3 Severity Score

Description

In Apache Commons IO before 2.7, When invoking the method FileNameUtils.normalize with an improper input string, like "//../foo", or "\\..\foo", the result would be the same value, thus possibly providing access to files in the parent directory, but not further above (thus "limited" path traversal), if the calling code would use the result to construct a path value.

Status

Show unmaintained releases

Package	Ubuntu Release	Status
commons-io	25.10 questing	Not affected
	25.04 plucky	Not affected
	24.10 oracular	Not affected
	24.04 LTS noble	Not affected
	23.10 mantic	Not affected
	23.04 lunar	Not affected
	22.10 kinetic	Not affected
	22.04 LTS jammy	Not affected
	21.10 impish	Not affected
	21.04 hirsute	Not affected
	20.10 groovy	Ignored end of life
	20.04 LTS focal	Fixed 2.6-2ubuntu0.20.04.1
	18.04 LTS bionic	Fixed 2.6-2ubuntu0.18.04.1
	16.04 LTS xenial	Vulnerable
	14.04 LTS trusty	Fixed 2.4-2ubuntu0.1~esm1

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Severity score breakdown

Parameter	Value
Base score	4.8 · Medium
Attack vector	Network
Attack complexity	High
Privileges required	None
User interaction	None
Scope	Unchanged
Confidentiality	Low
Integrity impact	Low
Availability impact	None
Vector	CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N

References

Related Ubuntu Security Notices (USN)

USN-5095-1
Apache Commons IO vulnerability
29 September 2021