CVE-2020-10737

Publication date 27 May 2020

Last updated 24 July 2024

Ubuntu priority

Cvss 3 Severity Score

A race condition was found in the mkhomedir tool shipped with the oddjob package in versions before 0.34.5 and 0.34.6 wherein, during the home creation, mkhomedir copies the /etc/skel directory into the newly created home and changes its ownership to the home's user without properly checking the homedir path. This flaw allows an attacker to leverage this issue by creating a symlink point to a target folder, which then has its ownership transferred to the new home directory's unprivileged user.

Status

Show unmaintained releases

Package	Ubuntu Release	Status
oddjob	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	Not affected
	20.04 LTS focal	Fixed 0.34.4-1ubuntu0.1~esm1 Ubuntu Pro
	19.10 eoan	Ignored
	18.04 LTS bionic	Fixed 0.34.3-4ubuntu0.1~esm1 Ubuntu Pro
	16.04 LTS xenial	Fixed 0.34.3-2ubuntu0.1~esm1 Ubuntu Pro
	14.04 LTS trusty	Not in release

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Patch details

For informational purposes only. We recommend not to cherry-pick updates. How can I get the fixes?

Package	Patch details
oddjob	Upstream: https://pagure.io/oddjob/c/10b8aaa1564b723a005b53acc069df71313f4cac

Severity score breakdown

Parameter	Value
Base score	6.3 · Medium
Attack vector	Local
Attack complexity	High
Privileges required	High
User interaction	Required
Scope	Unchanged
Confidentiality	High
Integrity impact	High
Availability impact	High
Vector	CVSS:3.1/AV:L/AC:H/PR:H/UI:R/S:U/C:H/I:H/A:H

References

Related Ubuntu Security Notices (USN)

USN-5169-1
oddjob vulnerability
9 August 2022