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AUSCERT External Security Bulletin Redistribution
ESB-2019.1185
systemd vulnerability
9 April 2019
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AusCERT Security Bulletin Summary
---------------------------------
Product: systemd
Publisher: Ubuntu
Operating System: Ubuntu
Linux variants
Impact/Access: Increased Privileges -- Existing Account
Resolution: Patch/Upgrade
CVE Names: CVE-2019-3842
Original Bulletin:
http://www.ubuntu.com/usn/usn-3938-1
Comment: This advisory references vulnerabilities in products which run on
platforms other than Ubuntu. It is recommended that administrators
running systemd check for an updated version of the software for
their operating system.
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Ubuntu Security Notice USN-3938-1
April 08, 2019
systemd vulnerability
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A security issue affects these releases of Ubuntu and its derivatives:
- - Ubuntu 18.10
- - Ubuntu 18.04 LTS
- - Ubuntu 16.04 LTS
- - Ubuntu 14.04 LTS
Summary:
The systemd PAM module could be used to gain additional PolicyKit
privileges.
Software Description:
- - systemd: system and service manager
Details:
Jann Horn discovered that pam_systemd created logind sessions using some
parameters from the environment. A local attacker could exploit this in
order to spoof the active session and gain additional PolicyKit
privileges.
Update instructions:
The problem can be corrected by updating your system to the following
package versions:
Ubuntu 18.10:
 libpam-systemd                  239-7ubuntu10.12
Ubuntu 18.04 LTS:
 libpam-systemd                  237-3ubuntu10.19
Ubuntu 16.04 LTS:
 libpam-systemd                  229-4ubuntu21.21
Ubuntu 14.04 LTS:
 libpam-systemd                  204-5ubuntu20.31
In general, a standard system update will make all the necessary changes.
References:
 https://usn.ubuntu.com/usn/usn-3938-1
 CVE-2019-3842
Package Information:
 https://launchpad.net/ubuntu/+source/systemd/239-7ubuntu10.12
 https://launchpad.net/ubuntu/+source/systemd/237-3ubuntu10.19
 https://launchpad.net/ubuntu/+source/systemd/229-4ubuntu21.21
 https://launchpad.net/ubuntu/+source/systemd/204-5ubuntu20.31
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