CVE-2020-35512 Information

Description

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

CVSS Vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Reference

https://bugs.gentoo.org/755392 https://bugzilla.redhat.com/show_bug.cgi?id=1909101 https://security-tracker.debian.org/tracker/CVE-2020-35512 https://gitlab.freedesktop.org/dbus/dbus/-/issues/305#note_829128

Attack Complexity

LOW

Privileges Required

LOW

User Interaction Required

LOW

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

HIGH

Availability Impact

HIGH

Base Score

HIGH

Base Severity

7.8