USN-3911-2: file regression

13 May 2020

file regression

A security issue affects these releases of Ubuntu and its derivatives:

  • Ubuntu 18.04 LTS
  • Ubuntu 16.04 LTS

Summary

USN-3911-1 introduced a regression in file.

Software Description

  • file - Tool to determine file types

Details

USN-3911-1 fixed vulnerabilities in file. One of the backported security fixes introduced a regression that caused the interpreter string to be truncated. This update fixes the problem.

We apologize for the inconvenience.

Original advisory details:

It was discovered that file incorrectly handled certain malformed ELF files. An attacker could use this issue to cause a denial of service, or possibly execute arbitrary code.

Update instructions

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

Ubuntu 18.04 LTS
file - 1:5.32-2ubuntu0.4
libmagic1 - 1:5.32-2ubuntu0.4
Ubuntu 16.04 LTS
file - 1:5.25-2ubuntu1.4
libmagic1 - 1:5.25-2ubuntu1.4

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