CVE-2020-15703

Publication date 24 September 2020

Last updated 24 July 2024

Ubuntu priority

Cvss 3 Severity Score

There is no input validation on the Locale property in an apt transaction. An unprivileged user can supply a full path to a writable directory, which lets aptd read a file as root. Having a symlink in place results in an error message if the file exists, and no error otherwise. This way an unprivileged user can check for the existence of any files on the system as root.

Status

Show unmaintained releases

Package	Ubuntu Release	Status
aptdaemon	20.04 LTS focal	Fixed 1.1.1+bzr982-0ubuntu32.2
	18.04 LTS bionic	Fixed 1.1.1+bzr982-0ubuntu19.4
	16.04 LTS xenial	Fixed 1.1.1+bzr982-0ubuntu14.4
	14.04 LTS trusty	Not in release

Severity score breakdown

Parameter	Value
Base score	5.5 · Medium
Attack vector	Local
Attack complexity	Low
Privileges required	Low
User interaction	None
Scope	Unchanged
Confidentiality	High
Integrity impact	None
Availability impact	None
Vector	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

References

Related Ubuntu Security Notices (USN)