RHSA-2021:3945 - Security Advisory

Topic

An update for the redis:6 module is now available for Red Hat Enterprise Linux 8.

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

Redis is an advanced key-value store. It is often referred to as a data-structure server since keys can contain strings, hashes, lists, sets, and sorted sets. For performance, Redis works with an in-memory data set. You can persist it either by dumping the data set to disk every once in a while, or by appending each command to a log.

Security Fix(es):

• redis: Lua scripts can overflow the heap-based Lua stack (CVE-2021-32626)
• redis: Integer overflow issue with Streams (CVE-2021-32627)
• redis: Integer overflow bug in the ziplist data structure (CVE-2021-32628)
• redis: Denial of service via Redis Standard Protocol (RESP) request (CVE-2021-32675)
• redis: Integer overflow issue with intsets (CVE-2021-32687)
• redis: Integer overflow issue with strings (CVE-2021-41099)

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

Affected Products

• Red Hat Enterprise Linux for x86_64 8 x86_64
• Red Hat Enterprise Linux for x86_64 - Extended Update Support 8.6 x86_64
• Red Hat Enterprise Linux for x86_64 - Extended Update Support 8.4 x86_64
• Red Hat Enterprise Linux Server - AUS 8.6 x86_64
• Red Hat Enterprise Linux Server - AUS 8.4 x86_64
• Red Hat Enterprise Linux for IBM z Systems 8 s390x
• Red Hat Enterprise Linux for IBM z Systems - Extended Update Support 8.6 s390x
• Red Hat Enterprise Linux for IBM z Systems - Extended Update Support 8.4 s390x
• Red Hat Enterprise Linux for Power, little endian 8 ppc64le
• Red Hat Enterprise Linux for Power, little endian - Extended Update Support 8.6 ppc64le
• Red Hat Enterprise Linux for Power, little endian - Extended Update Support 8.4 ppc64le
• Red Hat Enterprise Linux Server - TUS 8.6 x86_64
• Red Hat Enterprise Linux Server - TUS 8.4 x86_64
• Red Hat Enterprise Linux for ARM 64 8 aarch64
• Red Hat Enterprise Linux for ARM 64 - Extended Update Support 8.6 aarch64
• Red Hat Enterprise Linux for ARM 64 - Extended Update Support 8.4 aarch64
• Red Hat Enterprise Linux Server for Power LE - Update Services for SAP Solutions 8.6 ppc64le
• Red Hat Enterprise Linux Server for Power LE - Update Services for SAP Solutions 8.4 ppc64le
• Red Hat Enterprise Linux for x86_64 - Update Services for SAP Solutions 8.6 x86_64
• Red Hat Enterprise Linux for x86_64 - Update Services for SAP Solutions 8.4 x86_64

Fixes

• BZ - 2010991 - CVE-2021-32687 redis: Integer overflow issue with intsets
• BZ - 2011000 - CVE-2021-32675 redis: Denial of service via Redis Standard Protocol (RESP) request
• BZ - 2011004 - CVE-2021-32628 redis: Integer overflow bug in the ziplist data structure
• BZ - 2011010 - CVE-2021-32627 redis: Integer overflow issue with Streams
• BZ - 2011017 - CVE-2021-32626 redis: Lua scripts can overflow the heap-based Lua stack
• BZ - 2011020 - CVE-2021-41099 redis: Integer overflow issue with strings

CVEs

• CVE-2021-32626
• CVE-2021-32627
• CVE-2021-32628
• CVE-2021-32675
• CVE-2021-32687
• CVE-2021-41099

References

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