Moderate: unbound security, bug fix, and enhancement update

Topic

An update for unbound is now available for Red Hat Enterprise Linux 9.

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.

The following packages have been upgraded to a later upstream version: unbound (1.16.2). (BZ#2087120)

Security Fix(es):

• unbound: novel ghost domain attack that allows attackers to trigger continued resolvability of malicious domain names (CVE-2022-30698)
• unbound: novel ghost domain attack that allows attackers to trigger continued resolvability of malicious domain names (CVE-2022-30699)

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 9.1 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 9 x86_64
• Red Hat Enterprise Linux for IBM z Systems 9 s390x
• Red Hat Enterprise Linux for Power, little endian 9 ppc64le
• Red Hat Enterprise Linux for ARM 64 9 aarch64
• Red Hat CodeReady Linux Builder for x86_64 9 x86_64
• Red Hat CodeReady Linux Builder for Power, little endian 9 ppc64le
• Red Hat CodeReady Linux Builder for ARM 64 9 aarch64
• Red Hat CodeReady Linux Builder for IBM z Systems 9 s390x

Fixes

• BZ - 1981415 - unbound: don't use deprecated functions in OpenSSL 3.0
• BZ - 2056116 - unbound-devel is not available on Centos 9 Stream
• BZ - 2071543 - Unbound fails resolution of any SHA-1 signed domain [rhel-9.1.0]
• BZ - 2071943 - failing devel man pages for rhel 9
• BZ - 2079548 - [unbound: FIPS mode] does not resolve ED25519 and ED448
• BZ - 2087120 - [rebase] Rebase to 1.16.0
• BZ - 2094336 - unbound-keygen needs to be stoped
• 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 - 2116802 - unbound-keygen requires openssl [rhel9]

CVEs

• CVE-2022-30698
• CVE-2022-30699

References

• https://access.redhat.com/security/updates/classification/#moderate
• https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/9/html/9.1_release_notes/index