CVE-2020-1733

Publication date 11 March 2020

Last updated 24 July 2024

Ubuntu priority

Cvss 3 Severity Score

A race condition flaw was found in Ansible Engine 2.7.17 and prior, 2.8.9 and prior, 2.9.6 and prior when running a playbook with an unprivileged become user. When Ansible needs to run a module with become user, the temporary directory is created in /var/tmp. This directory is created with "umask 77 && mkdir -p <dir>"; this operation does not fail if the directory already exists and is owned by another user. An attacker could take advantage to gain control of the become user as the target directory can be retrieved by iterating '/proc/<pid>/cmdline'.

Status

Show unmaintained releases

Package	Ubuntu Release	Status
ansible	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	Not affected
	20.04 LTS focal	Fixed 2.9.6+dfsg-1ubuntu0.1~esm1 Ubuntu Pro
	19.10 eoan	Ignored end of life
	18.04 LTS bionic	Fixed 2.5.1+dfsg-1ubuntu0.1+esm1 Ubuntu Pro
	16.04 LTS xenial	Fixed 2.0.0.2-2ubuntu1.3+esm1 Ubuntu Pro
	14.04 LTS trusty	Vulnerable

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Severity score breakdown

Parameter	Value
Base score	5.0 · Medium
Attack vector	Local
Attack complexity	High
Privileges required	Low
User interaction	Required
Scope	Changed
Confidentiality	Low
Integrity impact	Low
Availability impact	Low
Vector	CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:C/C:L/I:L/A:L

References

Related Ubuntu Security Notices (USN)

USN-5315-1
Ansible vulnerabilities
7 June 2022