high
7.5
CWE
665
Advisory Published
CVE Published
Updated

CVE-2020-4067: Improper Initialization in coturn

First published: Mon Jun 29 2020(Updated: )

In coturn before version 4.5.1.3, there is an issue whereby STUN/TURN response buffer is not initialized properly. There is a leak of information between different client connections. One client (an attacker) could use their connection to intelligently query coturn to get interesting bytes in the padding bytes from the connection of another client. This has been fixed in 4.5.1.3.

Credit: security-advisories@github.com

Affected SoftwareAffected VersionHow to fix
ubuntu/coturn<4.5.0.7-1ubuntu2.18.04.2
4.5.0.7-1ubuntu2.18.04.2
ubuntu/coturn<4.5.1.1-1.1ubuntu0.19.10.1
4.5.1.1-1.1ubuntu0.19.10.1
ubuntu/coturn<4.5.1.1-1.1ubuntu0.20.04.1
4.5.1.1-1.1ubuntu0.20.04.1
ubuntu/coturn<4.5.1.3-1
4.5.1.3-1
ubuntu/coturn<4.5.0.3-1ubuntu0.3
4.5.0.3-1ubuntu0.3
debian/coturn
4.5.2-3
4.6.1-1
4.6.1-2
coturn<4.5.1.3
Debian Linux=8.0
Debian Linux=9.0
Debian Linux=10.0
Red Hat Fedora=31
Red Hat Fedora=32
Ubuntu=16.04
Ubuntu=18.04
Ubuntu=19.10
Ubuntu=20.04
SUSE Linux=15.2

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Reference Links

Parent vulnerabilities

(Appears in the following advisories)

Frequently Asked Questions

  • What is the severity of CVE-2020-4067?

    CVE-2020-4067 has been classified as a medium severity vulnerability due to the potential for information leakage between client connections.

  • How do I fix CVE-2020-4067?

    To fix CVE-2020-4067, upgrade to coturn version 4.5.1.3 or later.

  • What kind of systems are affected by CVE-2020-4067?

    CVE-2020-4067 affects coturn versions prior to 4.5.1.3 on Ubuntu, Debian, and Fedora systems.

  • What is the nature of the vulnerability described in CVE-2020-4067?

    CVE-2020-4067 is a vulnerability that involves the improper initialization of STUN/TURN response buffers, leading to potential information leaks.

  • Can an attacker exploit CVE-2020-4067 remotely?

    Yes, an attacker can exploit CVE-2020-4067 remotely by querying the coturn server to access sensitive information from other client connections.

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