Advisory Published

USN-4040-1: Expat vulnerability

First published: Wed Jun 26 2019(Updated: )

It was discovered that Expat incorrectly handled certain XML files. An attacker could possibly use this issue to cause a denial of service.

Affected SoftwareAffected VersionHow to fix
All of
ubuntu/libexpat1<2.2.6-1ubuntu0.19.04
2.2.6-1ubuntu0.19.04
=19.04
All of
ubuntu/libexpat1<2.2.6-1ubuntu0.18.10
2.2.6-1ubuntu0.18.10
=18.10
All of
ubuntu/libexpat1<2.2.5-3ubuntu0.1
2.2.5-3ubuntu0.1
=18.04
All of
ubuntu/lib64expat1<2.1.0-7ubuntu0.16.04.4
2.1.0-7ubuntu0.16.04.4
=16.04
All of
ubuntu/libexpat1<2.1.0-7ubuntu0.16.04.4
2.1.0-7ubuntu0.16.04.4
=16.04

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Reference Links

Child vulnerabilities

(Contains the following vulnerabilities)

Frequently Asked Questions

  • What is the vulnerability ID for this Expat vulnerability?

    The vulnerability ID is USN-4040-1.

  • What is the severity of the USN-4040-1 vulnerability?

    The severity of the USN-4040-1 vulnerability is not mentioned in the provided information.

  • How can an attacker exploit the USN-4040-1 vulnerability?

    An attacker could possibly exploit the USN-4040-1 vulnerability to cause a denial of service.

  • Which software is affected by the USN-4040-1 vulnerability?

    The affected software is libexpat1 version 2.2.6-1ubuntu0.19.04, libexpat1 version 2.2.6-1ubuntu0.18.10, libexpat1 version 2.2.5-3ubuntu0.1, lib64expat1 version 2.1.0-7ubuntu0.16.04.4, and libexpat1 version 2.1.0-7ubuntu0.16.04.4 on Ubuntu versions 19.04, 18.10, 18.04, and 16.04.

  • How can I fix the USN-4040-1 vulnerability?

    To fix the USN-4040-1 vulnerability, update the affected software to the specified remedy versions provided by Ubuntu.

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