Generating excessively long X9.42 DH keys or checking excessively long X9.42 DH keys or parameters may be very slow
CVE: CVE-2023-5678
Component: openssl
CWE: CWE-325
Severity: Low
CVSS v3: 5.3/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Release date: 2023-10-24T00:00:00+00:00

A flaw was found in OpenSSL, which caused the generation or checking of long X9.42 DH keys or parameters to be much slower than expected. This issue could lead to a denial of service.

Statement: This vulnerability in OpenSSL is categorized as a low severity issue primarily because it requires specific conditions to exploit and doesn't directly result in a full Denial of Service (DoS). While the excessive time spent in DH key generation or verification could potentially cause delays, the impact is mitigated by the fact that it requires untrusted sources supplying large Q parameter values. Additionally, the OpenSSL SSL/TLS implementation remains unaffected, limiting the scope of potential attacks. Moreover, there are inherent limits on key length, which further restrict the potential for exploitation.

Remediation:
Before applying this update, make sure all previously released errata relevant to your system have been applied.

For details on how to apply this update, refer to:

https://access.redhat.com/articles/11258
Before applying this update, make sure all previously released errata relevant to your system have been applied.

For details on how to apply this update, refer to:

https://access.redhat.com/articles/11258
For details on how to apply this update, which includes the changes described in this advisory, refer to:

https://access.redhat.com/articles/11258

For the update to take effect, all services linked to the OpenSSL library must be restarted, or the system rebooted.
For details on how to apply this update, which includes the changes described in this advisory, refer to:

https://access.redhat.com/articles/11258

For the update to take effect, all services linked to the OpenSSL library must be restarted, or the system rebooted.
For details on how to apply this update, which includes the changes described in this advisory, refer to:

https://access.redhat.com/articles/11258

For the update to take effect, all services linked to the OpenSSL library must be restarted, or the system rebooted.
For details on how to apply this update, which includes the changes described in this advisory, refer to:

https://access.redhat.com/articles/11258

For the update to take effect, all services linked to the OpenSSL library must be restarted, or the system rebooted.
Before applying the update, back up your existing Red Hat JBoss Web Server installation, including all applications and configuration files.

The References section of this erratum contains a download link for the update. You must be logged in to download the update.
Before applying the update, back up your existing Red Hat JBoss Web Server installation, including all applications and configuration files.

The References section of this erratum contains a download link for the update. You must be logged in to download the update.
Before applying the update, back up your existing installation, including all applications, configuration files, databases and database settings, and so on.

The References section of this erratum contains a download link (you must log in to download the update).
Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.