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CVE-2020-35512

Status Candidate

Overview

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

Related Files

Ubuntu Security Notice USN-5244-2
Posted May 9, 2022
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 5244-2 - USN-5244-1 fixed a vulnerability in DBus. This update provides the corresponding update for Ubuntu 18.04 LTS and Ubuntu 20.04 LTS. Daniel Onaca discovered that DBus contained a use-after-free vulnerability, caused by the incorrect handling of usernames sharing the same UID. An attacker could possibly use this issue to cause DBus to crash, resulting in a denial of service.

tags | advisory, denial of service
systems | linux, ubuntu
advisories | CVE-2020-35512
SHA-256 | 945e6909654f0c47ea89dac5eda071afc5a92017802d7031d63cefcdad8721d0
Ubuntu Security Notice USN-5244-1
Posted Jan 24, 2022
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 5244-1 - Daniel Onaca discovered that DBus contained a use-after-free vulnerability, caused by the incorrect handling of usernames sharing the same UID. An attacker could possibly use this issue to cause DBus to crash, resulting in a denial of service.

tags | advisory, denial of service
systems | linux, ubuntu
advisories | CVE-2020-35512
SHA-256 | eb658d0fae205e9fb1cf3b939c4f2178257b0554ee56bdb3534db4af424f8a00
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