RHSA-2023:7877 - Security Advisory

Topic

An update for openssl is now available for Red Hat Enterprise Linux 8.

Red Hat Product Security has rated this update as having a security impact of Low. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.

Description

OpenSSL is a toolkit that implements the Secure Sockets Layer (SSL) and Transport Layer Security (TLS) protocols, as well as a full-strength general-purpose cryptography library.

Security Fix(es):

• openssl: Excessive time spent checking DH keys and parameters (CVE-2023-3446)
• OpenSSL: Excessive time spent checking DH q parameter value (CVE-2023-3817)
• openssl: Generating excessively long X9.42 DH keys or checking excessively long X9.42 DH keys or parameters may be very slow (CVE-2023-5678)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Solution

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.

Affected Products

• Red Hat Enterprise Linux for x86_64 8 x86_64
• Red Hat Enterprise Linux for IBM z Systems 8 s390x
• Red Hat Enterprise Linux for Power, little endian 8 ppc64le
• Red Hat Enterprise Linux for ARM 64 8 aarch64

Fixes

• BZ - 2224962 - CVE-2023-3446 openssl: Excessive time spent checking DH keys and parameters
• BZ - 2227852 - CVE-2023-3817 OpenSSL: Excessive time spent checking DH q parameter value
• BZ - 2248616 - CVE-2023-5678 openssl: Generating excessively long X9.42 DH keys or checking excessively long X9.42 DH keys or parameters may be very slow

CVEs

• CVE-2023-3446
• CVE-2023-3817
• CVE-2023-5678

References

• https://access.redhat.com/security/updates/classification/#low