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AUSCERT External Security Bulletin Redistribution
ESB-2019.0150
PolicyKit vulnerability
17 January 2019
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AusCERT Security Bulletin Summary
---------------------------------
Product: libpolkit-backend-1-0
Publisher: Ubuntu
Operating System: Ubuntu
Impact/Access: Increased Privileges -- Existing Account
Resolution: Patch/Upgrade
CVE Names: CVE-2018-19788
Reference: ESB-2019.0059
ESB-2019.0050
ESB-2018.3797
Original Bulletin:
http://www.ubuntu.com/usn/usn-3861-1
http://www.ubuntu.com/usn/usn-3861-2
Comment: This bulletin contains two (2) security advisories.
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USN-3861-1: PolicyKit vulnerability
16 January 2019
policykit-1 vulnerability
A security issue affects these releases of Ubuntu and its derivatives:
o Ubuntu 18.10
o Ubuntu 18.04 LTS
o Ubuntu 16.04 LTS
o Ubuntu 14.04 LTS
Summary
PolicyKit could allow unintended access.
Software Description
o policykit-1 - framework for managing administrative policies and privileges
Details
It was discovered that PolicyKit incorrectly handled certain large user UIDs. A
local attacker with a large UID could possibly use this issue to perform
privileged actions.
Update instructions
The problem can be corrected by updating your system to the following package
versions:
Ubuntu 18.10
libpolkit-backend-1-0 - 0.105-21ubuntu0.3
policykit-1 - 0.105-21ubuntu0.3
Ubuntu 18.04 LTS
libpolkit-backend-1-0 - 0.105-20ubuntu0.18.04.4
policykit-1 - 0.105-20ubuntu0.18.04.4
Ubuntu 16.04 LTS
libpolkit-backend-1-0 - 0.105-14.1ubuntu0.4
policykit-1 - 0.105-14.1ubuntu0.4
Ubuntu 14.04 LTS
libpolkit-backend-1-0 - 0.105-4ubuntu3.14.04.5
policykit-1 - 0.105-4ubuntu3.14.04.5
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-2018-19788
(C) 2017 Canonical Ltd. Ubuntu and Canonical are registered trademarks of
Canonical Ltd.
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USN-3861-2: PolicyKit vulnerability
16 January 2019
policykit-1 vulnerability
A security issue affects these releases of Ubuntu and its derivatives:
o Ubuntu 12.04 ESM
Summary
PolicyKit could allow unintended access.
Software Description
o policykit-1 - framework for managing administrative policies and privileges
Details
USN-3861-1 fixed a vulnerability in PolicyKit. This update provides the
corresponding update for Ubuntu 12.04 ESM.
Original advisory details:
It was discovered that PolicyKit incorrectly handled certain large user UIDs. A
local attacker with a large UID could possibly use this issue to perform
privileged actions.
Update instructions
The problem can be corrected by updating your system to the following package
versions:
Ubuntu 12.04 ESM
libpolkit-backend-1-0 - 0.104-1ubuntu1.4
policykit-1 - 0.104-1ubuntu1.4
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-3861-1
o CVE-2018-19788
(C) 2017 Canonical Ltd. Ubuntu and Canonical are registered trademarks of
Canonical Ltd.
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