Moderate: bind security update

Synopsis

Moderate: bind security update

Type/Severity

Security Advisory: Moderate

Topic

An update for bind is now available for Red Hat Enterprise Linux 7.7 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 Berkeley Internet Name Domain (BIND) is an implementation of the Domain Name System (DNS) protocols. BIND includes a DNS server (named); a resolver library (routines for applications to use when interfacing with DNS); and tools for verifying that the DNS server is operating correctly.

Security Fix(es):

• bind: truncated TSIG response can lead to an assertion failure (CVE-2020-8622)
  
• bind: remotely triggerable assertion failure in pk11.c (CVE-2020-8623)
  
• bind: incorrect enforcement of update-policy rules of type "subdomain" (CVE-2020-8624)
  

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

After installing the update, the BIND daemon (named) will be restarted automatically.

Affected Products

• Red Hat Enterprise Linux for x86_64 - Extended Update Support 7.7 x86_64
• Red Hat Enterprise Linux for IBM z Systems - Extended Update Support 7.7 s390x
• Red Hat Enterprise Linux for Power, big endian - Extended Update Support 7.7 ppc64
• Red Hat Enterprise Linux EUS Compute Node 7.7 x86_64
• Red Hat Enterprise Linux Server - AUS 7.7 x86_64
• Red Hat Enterprise Linux for Power, little endian - Extended Update Support 7.7 ppc64le
• Red Hat Enterprise Linux Server - TUS 7.7 x86_64
• Red Hat Enterprise Linux Server (for IBM Power LE) - Update Services for SAP Solutions 7.7 ppc64le
• Red Hat Enterprise Linux Server - Update Services for SAP Solutions 7.7 x86_64

Fixes

• BZ - 1869473 - CVE-2020-8622 bind: truncated TSIG response can lead to an assertion failure
• BZ - 1869477 - CVE-2020-8623 bind: remotely triggerable assertion failure in pk11.c
• BZ - 1869480 - CVE-2020-8624 bind: incorrect enforcement of update-policy rules of type "subdomain"

CVEs

• CVE-2020-8622
• CVE-2020-8623
• CVE-2020-8624

References

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