CVE-2018-12021

Publication date 5 July 2018

Last updated 25 August 2025

Ubuntu priority

Cvss 3 Severity Score

Description

Singularity 2.3.0 through 2.5.1 is affected by an incorrect access control on systems supporting overlay file system. When using the overlay option, a malicious user may access sensitive information by exploiting a few specific Singularity features.

From the Ubuntu Security Team

It was discovered that Singularity incorrectly handled access control. An attacker could possibly use this issue to obtain sensitive information.

Status

Show unmaintained releases

Package	Ubuntu Release	Status
singularity-container	23.04 lunar	Not in release
	22.10 kinetic	Not in release
	22.04 LTS jammy	Not in release
	21.10 impish	Not in release
	21.04 hirsute	Not in release
	20.10 groovy	Not in release
	20.04 LTS focal	Not in release
	19.10 eoan	Not affected
	19.04 disco	Not affected
	18.10 cosmic	Not affected
	18.04 LTS bionic	Fixed 2.4.2-4ubuntu0.1~esm1
	17.10 artful	Ignored end of life
	16.04 LTS xenial	Not in release
	14.04 LTS trusty	Not in release

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Severity score breakdown

Parameter	Value
Base score	6.5 · Medium
Attack vector	Network
Attack complexity	Low
Privileges required	Low
User interaction	None
Scope	Unchanged
Confidentiality	High
Integrity impact	None
Availability impact	None
Vector	CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

References

Related Ubuntu Security Notices (USN)

USN-4840-1
Singularity vulnerabilities
15 March 2021