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AUSCERT External Security Bulletin Redistribution
ESB-2020.2076
USN-4398-1: DBus vulnerability
17 June 2020
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AusCERT Security Bulletin Summary
---------------------------------
Product: DBus
Publisher: Ubuntu
Operating System: Ubuntu
Impact/Access: Denial of Service -- Existing Account
Resolution: Patch/Upgrade
CVE Names: CVE-2020-12049
Reference: ESB-2020.1979
Original Bulletin:
https://usn.ubuntu.com/4398-1/
https://usn.ubuntu.com/4398-2/
Comment: This bulletin contains two (2) Ubuntu security advisories.
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USN-4398-1: DBus vulnerability
16 June 2020
dbus vulnerability
A security issue affects these releases of Ubuntu and its derivatives:
o Ubuntu 20.04 LTS
o Ubuntu 19.10
o Ubuntu 18.04 LTS
o Ubuntu 16.04 LTS
Summary
DBus could be made to crash if it received specially crafted input.
Software Description
o dbus - simple interprocess messaging system
Details
Kevin Backhouse discovered that DBus incorrectly handled file descriptors. A
local attacker could possibly use this issue to cause DBus to crash, resulting
in a denial of service.
Update instructions
The problem can be corrected by updating your system to the following package
versions:
Ubuntu 20.04 LTS
dbus - 1.12.16-2ubuntu2.1
libdbus-1-3 - 1.12.16-2ubuntu2.1
Ubuntu 19.10
dbus - 1.12.14-1ubuntu2.1
libdbus-1-3 - 1.12.14-1ubuntu2.1
Ubuntu 18.04 LTS
dbus - 1.12.2-1ubuntu1.2
libdbus-1-3 - 1.12.2-1ubuntu1.2
Ubuntu 16.04 LTS
dbus - 1.10.6-1ubuntu3.6
libdbus-1-3 - 1.10.6-1ubuntu3.6
To update your system, please follow these instructions: https://
wiki.ubuntu.com/Security/Upgrades .
After a standard system update you need to reboot your computer to make all the
necessary changes.
References
o CVE-2020-12049
- --------------------------------------------------------------------------------
USN-4398-2: DBus vulnerability
16 June 2020
dbus vulnerability
A security issue affects these releases of Ubuntu and its derivatives:
o Ubuntu 14.04 ESM
o Ubuntu 12.04 ESM
Summary
DBus could be made to crash if it received specially crafted input.
Software Description
o dbus - simple interprocess messaging system
Details
USN-4398-1 fixed a vulnerability in DBus. This update provides the
corresponding update for Ubuntu 12.04 ESM and Ubuntu 14.04 ESM.
Original advisory details:
Kevin Backhouse discovered that DBus incorrectly handled file descriptors. A
local attacker could possibly use this issue to cause DBus to crash, resulting
in a denial of service.
Update instructions
The problem can be corrected by updating your system to the following package
versions:
Ubuntu 14.04 ESM
libdbus-1-3 - 1.6.18-0ubuntu4.5+esm2
Ubuntu 12.04 ESM
libdbus-1-3 - 1.4.18-1ubuntu1.10
To update your system, please follow these instructions: https://
wiki.ubuntu.com/Security/Upgrades .
After a standard system update you need to reboot your computer to make all the
necessary changes.
References
o USN-4398-1
o CVE-2020-12049
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