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Ubuntu 18.04 LTS and 16.04 LTS: USN-3911-2 Critical File Regression

ubuntu
Calendar Grey May 13, 2020
Dist Ubuntu Esm H88
A vulnerability concern impacts Ubuntu 20.04 LTS and 22.04 LTS owing to a recent patch that rectifies previous security flaws.
USN-3911-1 introduced a regression in file.

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.

Topics%20covered

Topics Covered

security advisory DoS Ubuntu file regression malformed ELF

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

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

References

https://ubuntu.com/security/notices/USN-3911-2

https://ubuntu.com/security/notices/USN-3911-1

https://bugs.launchpad.net/ubuntu/+source/file/+bug/1835596

Severity
critical
Lowest
Low
Medium
High
Critical

May 13, 2020

Topics%20covered

Topics Covered

security advisory DoS Ubuntu file regression malformed ELF

Package Information

https://launchpad.net/ubuntu/+source/file/1:5.32-2ubuntu0.4
https://launchpad.net/ubuntu/+source/file/1:5.25-2ubuntu1.4

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