Advisory Published

USN-4398-2: DBus vulnerability

First published: Tue Jun 16 2020(Updated: )

USN-4398-1 fixed a vulnerability in DBus. This update provides the corresponding update for Ubuntu 12.04 ESM and Ubuntu 14.04 ESM. Original advisory details: Kevin Backhouse discovered that DBus incorrectly handled file descriptors. A local attacker could possibly use this issue to cause DBus to crash, resulting in a denial of service.

Affected SoftwareAffected VersionHow to fix
All of
ubuntu/libdbus-1-3<1.6.18-0ubuntu4.5+esm2
1.6.18-0ubuntu4.5+esm2
Ubuntu Ubuntu=14.04
All of
ubuntu/libdbus-1-3<1.4.18-1ubuntu1.10
1.4.18-1ubuntu1.10
Ubuntu Ubuntu=12.04

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Child vulnerabilities

(Contains the following vulnerabilities)

Frequently Asked Questions

  • What is the vulnerability ID for this DBus vulnerability?

    The vulnerability ID for this DBus vulnerability is USN-4398-2.

  • What software versions are affected by this vulnerability?

    Ubuntu 12.04 ESM (libdbus-1-3 version 1.4.18-1ubuntu1.10) and Ubuntu 14.04 ESM (libdbus-1-3 version 1.6.18-0ubuntu4.5+esm2) are affected by this vulnerability.

  • What is the severity of this vulnerability?

    The severity of this vulnerability is not specified in the information provided.

  • How can I fix this vulnerability?

    To fix this vulnerability, update libdbus-1-3 to the specified versions: 1.4.18-1ubuntu1.10 for Ubuntu 12.04 ESM and 1.6.18-0ubuntu4.5+esm2 for Ubuntu 14.04 ESM.

  • Where can I find more information about this vulnerability?

    More information about this vulnerability can be found on the Ubuntu Security Notices website at https://ubuntu.com/security/notices/USN-4398-1 and the Canonical website at https://ubuntu.com/security/CVE-2020-12049.

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