RHSA-2024:2045 - Security Advisory

Topic

An update for unbound is now available for Red Hat Enterprise Linux 8.6 Extended Update Support.

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

The unbound packages provide a validating, recursive, and caching DNS or DNSSEC resolver.

Security Fix(es):

• unbound: NRDelegation attack leads to uncontrolled resource consumption (Non-Responsive Delegation Attack) (CVE-2022-3204)
• unbound: novel ghost domain attack that allows attackers to trigger continued resolvability of malicious domain names (CVE-2022-30699)
• unbound: novel ghost domain attack that allows attackers to trigger continued resolvability of malicious domain names (CVE-2022-30698)

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, refer to:

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

Affected Products

• Red Hat Enterprise Linux for x86_64 - Extended Update Support 8.6 x86_64
• Red Hat Enterprise Linux Server - AUS 8.6 x86_64
• Red Hat Enterprise Linux for IBM z Systems - Extended Update Support 8.6 s390x
• Red Hat Enterprise Linux for Power, little endian - Extended Update Support 8.6 ppc64le
• Red Hat Enterprise Linux Server - TUS 8.6 x86_64
• Red Hat Enterprise Linux for ARM 64 - Extended Update Support 8.6 aarch64
• Red Hat Enterprise Linux Server for Power LE - Update Services for SAP Solutions 8.6 ppc64le
• Red Hat Enterprise Linux for x86_64 - Update Services for SAP Solutions 8.6 x86_64

Fixes

• BZ - 2116725 - CVE-2022-30698 unbound: novel ghost domain attack that allows attackers to trigger continued resolvability of malicious domain names
• BZ - 2116729 - CVE-2022-30699 unbound: novel ghost domain attack that allows attackers to trigger continued resolvability of malicious domain names
• BZ - 2128947 - CVE-2022-3204 unbound: NRDelegation attack leads to uncontrolled resource consumption (Non-Responsive Delegation Attack)

CVEs

• CVE-2022-3204
• CVE-2022-30698
• CVE-2022-30699

References

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