Advisory Published

USN-6435-1: OpenSSL vulnerabilities

First published: Wed Oct 18 2023(Updated: )

It was discovered that OpenSSL incorrectly handled excessively large Diffie-Hellman parameters. An attacker could possibly use this issue to cause a denial of service. (CVE-2023-3446) Bernd Edlinger discovered that OpenSSL incorrectly handled excessively large Diffie-Hellman parameters. An attacker could possibly use this issue to cause a denial of service. (CVE-2023-3817)

Affected SoftwareAffected VersionHow to fix
All of
ubuntu/libssl1.1<1.1.1-1ubuntu2.1~18.04.23+esm3
1.1.1-1ubuntu2.1~18.04.23+esm3
=18.04
All of
ubuntu/openssl<1.1.1-1ubuntu2.1~18.04.23+esm3
1.1.1-1ubuntu2.1~18.04.23+esm3
=18.04
All of
ubuntu/libssl1.0.0<1.0.2g-1ubuntu4.20+esm10
1.0.2g-1ubuntu4.20+esm10
=16.04
All of
ubuntu/openssl<1.0.2g-1ubuntu4.20+esm10
1.0.2g-1ubuntu4.20+esm10
=16.04

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Child vulnerabilities

(Contains the following vulnerabilities)

Frequently Asked Questions

  • What is the vulnerability ID for the OpenSSL vulnerabilities?

    The vulnerability ID for the OpenSSL vulnerabilities is CVE-2023-3446.

  • What is the severity of the OpenSSL vulnerabilities?

    The severity of the OpenSSL vulnerabilities is not specified in the provided information.

  • How can the OpenSSL vulnerabilities be exploited?

    The OpenSSL vulnerabilities can be exploited by using excessively large Diffie-Hellman parameters to cause a denial of service.

  • Which versions of Ubuntu are affected by the OpenSSL vulnerabilities?

    The OpenSSL vulnerabilities affect Ubuntu 18.04 and Ubuntu 16.04.

  • How can I fix the OpenSSL vulnerabilities?

    To fix the OpenSSL vulnerabilities, update the libssl1.1 and openssl packages to the specified versions mentioned in the security notices.

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