USN-3565-1: Exim vulnerability

Published Feb 12, 2018
·
Updated

Meh Chang discovered that Exim incorrectly handled memory in certain decoding operations. A remote attacker could use this issue to cause Exim to crash, resulting in a denial of service, or possibly execute arbitrary code.

Affected Software

12 affected componentsFixes available
All of the following
ubuntu/exim4-daemon-heavy<4.89-5ubuntu1.3
4.89-5ubuntu1.3
Ubuntu Ubuntu=17.10
All of the following
ubuntu/exim4-daemon-light<4.89-5ubuntu1.3
4.89-5ubuntu1.3
Ubuntu Ubuntu=17.10
All of the following
ubuntu/exim4-daemon-heavy<4.86.2-2ubuntu2.3
4.86.2-2ubuntu2.3
Ubuntu Ubuntu=16.04
All of the following
ubuntu/exim4-daemon-light<4.86.2-2ubuntu2.3
4.86.2-2ubuntu2.3
Ubuntu Ubuntu=16.04
All of the following
ubuntu/exim4-daemon-heavy<4.82-3ubuntu2.4
4.82-3ubuntu2.4
Ubuntu Ubuntu=14.04
All of the following
ubuntu/exim4-daemon-light<4.82-3ubuntu2.4
4.82-3ubuntu2.4
Ubuntu Ubuntu=14.04

Remediation

Recommended actions to resolve this vulnerability, in priority order.

  1. Upgrade

    Upgrade ubuntu/exim4-daemon-heavy to a version that resolves this vulnerability.

    Fixed in 4.89-5ubuntu1.3
  2. Upgrade

    Upgrade ubuntu/exim4-daemon-light to a version that resolves this vulnerability.

    Fixed in 4.89-5ubuntu1.3
  3. Upgrade

    Upgrade ubuntu/exim4-daemon-heavy to a version that resolves this vulnerability.

    Fixed in 4.86.2-2ubuntu2.3
  4. Upgrade

    Upgrade ubuntu/exim4-daemon-light to a version that resolves this vulnerability.

    Fixed in 4.86.2-2ubuntu2.3
  5. Upgrade

    Upgrade ubuntu/exim4-daemon-heavy to a version that resolves this vulnerability.

    Fixed in 4.82-3ubuntu2.4
  6. Upgrade

    Upgrade ubuntu/exim4-daemon-light to a version that resolves this vulnerability.

    Fixed in 4.82-3ubuntu2.4

Event History

Feb 12, 2018
Advisory Published
via Ubuntu·12:00 AM
Data Sourced
via Ubuntu·12:00 AM
DescriptionAffected Software

Child vulnerabilities

Contains the following vulnerabilities.

Frequently Asked Questions

1

What is the vulnerability ID of this Exim vulnerability?

The vulnerability ID of this Exim vulnerability is USN-3565-1.

2

What is the description of the Exim vulnerability?

The Exim vulnerability involves the incorrect handling of memory in certain decoding operations, which can lead to a denial of service or the execution of arbitrary code.

3

Which software is affected by this Exim vulnerability?

The affected software includes Exim4-daemon-heavy and Exim4-daemon-light packages on Ubuntu versions 17.10, 16.04, and 14.04.

4

How can this Exim vulnerability be fixed?

To fix this vulnerability, upgrade the affected Exim packages to version 4.89-5ubuntu1.3, 4.86.2-2ubuntu2.3, or 4.82-3ubuntu2.4 depending on your Ubuntu version.

5

Where can I find more information about this Exim vulnerability?

You can find more information about this Exim vulnerability at the following references: CVE-2018-6789, Ubuntu Security Notice USN-3565-1, and the Ubuntu Launchpad pages for the affected Exim packages.

Company

Resources

Contact

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