CVE-2020-35512

Published: 15 February 2021

A use-after-free flaw was found in D-Bus Development branch <= 1.13.16, dbus-1.12.x stable branch <= 1.12.18, and dbus-1.10.x and older branches <= 1.10.30 when a system has multiple usernames sharing the same UID. When a set of policy rules references these usernames, D-Bus may free some memory in the heap, which is still used by data structures necessary for the other usernames sharing the UID, possibly leading to a crash or other undefined behaviors

Priority

Cvss 3 Severity Score

7.8

Score breakdown

Status

Package	Release	Status
dbus Launchpad, Ubuntu, Debian	bionic	Released (1.12.2-1ubuntu1.3)
	focal	Released (1.12.16-2ubuntu2.2)
	groovy	Not vulnerable (1.12.20-1ubuntu1)
	hirsute	Not vulnerable
	impish	Not vulnerable
	jammy	Not vulnerable
	kinetic	Not vulnerable
	lunar	Not vulnerable
	trusty	Needed
	upstream	Released (1.12.20-1)
	xenial	Released (1.10.6-1ubuntu3.6+esm1)

Severity score breakdown

Parameter	Value
Base score	7.8
Attack vector	Local
Attack complexity	Low
Privileges required	Low
User interaction	None
Scope	Unchanged
Confidentiality	High
Integrity impact	High
Availability impact	High
Vector	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

References

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