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AUSCERT External Security Bulletin Redistribution
ESB-2019.2850
USN-4077-1: tmpreaper vulnerability
31 July 2019
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AusCERT Security Bulletin Summary
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Product: tmpreaper
Publisher: Ubuntu
Operating System: Ubuntu
Impact/Access: Increased Privileges -- Existing Account
Resolution: Patch/Upgrade
CVE Names: CVE-2019-3461
Reference: ESB-2019.0107.2
Original Bulletin:
https://usn.ubuntu.com/4077-1/
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USN-4077-1: tmpreaper vulnerability
29 July 2019
tmpreaper vulnerability
A security issue affects these releases of Ubuntu and its derivatives:
o Ubuntu 18.04 LTS
o Ubuntu 16.04 LTS
Summary
tmpreaper could be made to overwrite files as the administrator.
Software Description
o tmpreaper - cleans up files in directories based on their age
Details
It was discovered that tmpreaper incorrectly handled certain mount operations.
A local attacker could possibly use this issue to create arbitrary files,
leading to privilege escalation.
Update instructions
The problem can be corrected by updating your system to the following package
versions:
Ubuntu 18.04 LTS
tmpreaper - 1.6.13+nmu1+deb9u1build0.18.04.1
Ubuntu 16.04 LTS
tmpreaper - 1.6.13+nmu1+deb9u1build0.16.04.1
To update your system, please follow these instructions: https://
wiki.ubuntu.com/Security/Upgrades .
In general, a standard system update will make all the necessary changes.
References
o CVE-2019-3461
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