1. Ubuntu Security Notices
  2. USN-3748-1

USN-3748-1: base-files vulnerability

Publication date

21 August 2018

Overview

base-files could be made to hang or overwrite files as the administrator.

Releases

Packages

  • base-files - Debian base system miscellaneous files

Details

Sander Bos discovered that the MOTD update script incorrectly handled
temporary files. A local attacker could use this issue to cause a denial of
service, or possibly escalate privileges if kernel symlink restrictions
were disabled.

Sander Bos discovered that the MOTD update script incorrectly handled
temporary files. A local attacker could use this issue to cause a denial of
service, or possibly escalate privileges if kernel symlink restrictions
were disabled.

Update instructions

In general, a standard system update will make all the necessary changes.

Learn more about how to get the fixes.

The problem can be corrected by updating your system to the following package versions:

Ubuntu Release Package Version
18.04 bionic base-files –  10.1ubuntu2.2

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References

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