RHSA-2023:7052 - Security Advisory

Topic

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

Red Hat Product Security has rated this update as having a security impact of Moderate. 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

Libreswan is an implementation of IPsec and IKE for Linux. IPsec is the Internet Protocol Security and uses strong cryptography to provide both authentication and encryption services. These services allow you to build secure tunnels through untrusted networks such as virtual private network (VPN).

Security Fix(es):

• libreswan: Invalid IKEv2 REKEY proposal causes restart (CVE-2023-38710)
• libreswan: Invalid IKEv1 Quick Mode ID causes restart (CVE-2023-38711)
• libreswan: Invalid IKEv1 repeat IKE SA delete causes crash and restart (CVE-2023-38712)

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.

Additional Changes:

For detailed information on changes in this release, see the Red Hat Enterprise Linux 8.9 Release Notes linked from 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

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 - 2215952 - CVE-2023-38711 libreswan: Invalid IKEv1 Quick Mode ID causes restart
• BZ - 2225368 - CVE-2023-38710 libreswan: Invalid IKEv2 REKEY proposal causes restart
• BZ - 2225369 - CVE-2023-38712 libreswan: Invalid IKEv1 repeat IKE SA delete causes crash and restart
• BZ - 2234731 - authby=rsasig fails in FIPS policy

CVEs

• CVE-2023-38710
• CVE-2023-38711
• CVE-2023-38712

References

• https://access.redhat.com/security/updates/classification/#moderate
• https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/8/html/8.9_release_notes/index