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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

Low

Cvss 3 Severity Score

7.8

Score breakdown

Status

Package Release Status
dbus
Launchpad, Ubuntu, Debian
impish Not vulnerable

groovy Not vulnerable
(1.12.20-1ubuntu1)
hirsute Not vulnerable

upstream
Released (1.12.20-1)
bionic
Released (1.12.2-1ubuntu1.3)
trusty Needed

xenial
Released (1.10.6-1ubuntu3.6+esm1)
Available with Ubuntu Pro or Ubuntu Pro (Infra-only)
focal
Released (1.12.16-2ubuntu2.2)
jammy Not vulnerable

kinetic Not vulnerable

lunar Not vulnerable

mantic Not vulnerable

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