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Ubuntu 18.04 LTS: USN-6435-1 Moderate OpenSSL Resource Delays

ubuntu
Calendar Grey October 18, 2023
Dist Ubuntu Esm H88
The Ubuntu USN-6435-1 advisory resolves vulnerabilities in OpenSSL that could result in resource exhaustion and performance lags. Key updates were implemented.
OpenSSL could be made to consume resources and cause long delays if it processed certain input.

Summary

OpenSSL could be made to consume resources and cause long delays

if it processed certain input.

Software Description:

- openssl: Secure Socket Layer (SSL) cryptographic library and tools

Details:

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)

Topics%20covered

Topics Covered

security advisory moderate denial of service ubuntu openssl resource consumption

Update Instructions

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 18.04 LTS (Available with Ubuntu Pro):
   libssl1.1                        1.1.1-1ubuntu2.1~18.04.23+esm1
   openssl                         1.1.1-1ubuntu2.1~18.04.23+esm1

Ubuntu 16.04 LTS (Available with Ubuntu Pro):
   libssl1.0.0                     1.0.2g-1ubuntu4.20+esm10
   openssl                         1.0.2g-1ubuntu4.20+esm10

After a standard system update you need to reboot your computer to make
all the necessary changes.

References

  https://ubuntu.com/security/notices/USN-6435-1

  CVE-2023-3446, CVE-2023-3817

Ubuntu Security Notice USN-6435-1

Topics%20covered

Topics Covered

security advisory moderate denial of service ubuntu openssl resource consumption

Package Information

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