Fedora 35: 2021-aa94492a09 Critical: Redis Buffer Overflow and DoS Issues

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.

You can run atomic operations on these types, like appending to a string;

incrementing the value in a hash; pushing to a list; computing set

intersection, union and difference; or getting the member with highest

ranking in a sorted set.

In order to achieve its outstanding performance, Redis works with an

in-memory dataset. Depending on your use case, you can persist it either

by dumping the dataset to disk every once in a while, or by appending

each command to a log.

Redis also supports trivial-to-setup master-slave replication, with very

fast non-blocking first synchronization, auto-reconnection on net split

and so forth.

Other features include Transactions, Pub/Sub, Lua scripting, Keys with a

limited time-to-live, and configuration settings to make Redis behave like

a cache.

You can use Redis from most programming languages also.

**Redis 6.2.** - 6 Released Mon Oct 4 12:00:00 IDT 2021 Upgrade urgency:

SECURITY, contains fixes to security issues. Security Fixes: *

(**CVE-2021-41099**) Integer to heap buffer overflow handling certain string

commands and network payloads, when proto-max-bulk-len is manually configured

to a non-default, very large value [reported by yiyuaner]. *

(**CVE-2021-32762**) Integer to heap buffer overflow issue in redis-cli and

redis-sentinel parsing large multi-bulk replies on some older and less common

platforms [reported by Microsoft Vulnerability Research]. * (**CVE-2021-32687**)

Integer to heap buffer overflow with intsets, when set-max-intset-entries is

manually configured to a non-default, very large value [reported by Pawel

Wieczorkiewicz, AWS]. * (**CVE-2021-32675**) Denial Of Service when processing

RESP request payloads with a large number of elements on many connections. *

(**CVE-2021-32672**) Random heap reading issue with Lua Debugger [reported by

Meir Shpilraien]. * (**CVE-2021-32628**) Integer to heap buffer overflow

handling ziplist-encoded data types, when configuring a large, non-default

value for hash-max-ziplist-entries, hash-max-ziplist-value, zset-max-ziplist-entries or zset-max-ziplist-value [reported by sundb]. * (**CVE-2021-32627**)

Integer to heap buffer overflow issue with streams, when configuring a non-default, large value for proto-max-bulk-len and client-query-buffer-limit

[reported by sundb]. * (**CVE-2021-32626**) Specially crafted Lua scripts may

result with Heap buffer overflow [reported by Meir Shpilraien]. Bug fixes

that involve behavior changes: * GEO* STORE with empty source key deletes the

destination key and return 0 (#9271) Previously it would have returned an

empty array like the non-STORE variant. * PUBSUB NUMPAT replies with number of

patterns rather than number of subscriptions (#9209) This actually changed in

6.2.0 but was overlooked and omitted from the release notes. Bug fixes that are

only applicable to previous releases of Redis 6.2: * Fix CLIENT PAUSE, used an

old timeout from previous PAUSE (#9477) * Fix CLIENT PAUSE in a replica would

mess the replication offset (#9448) * Add some missing error statistics in INFO

errorstats (#9328) Other bug fixes: * Fix incorrect reply of COMMAND command

key positions for MIGRATE command (#9455) * Fix appendfsync to always guarantee

fsync before reply, on MacOS and FreeBSD (kqueue) (#9416) * Fix the wrong mis-detection of sync_file_range system call, affecting performance (#9371) CLI

tools: * When redis-cli received ASK response, it didn't handle it (#8930)

Improvements: * Add latency monitor sample when key is deleted via lazy expire

(#9317) * Sanitize corrupt payload improvements (#9321, #9399) * Delete empty

keys when loading RDB file or handling a RESTORE command (#9297, #9349)

* Mon Oct 4 2021 Remi Collet - 6.2.6-1

- Upstream 6.2.6 release.

* Tue Sep 14 2021 Sahana Prasad - 6.2.5-2

- Rebuilt with OpenSSL 3.0.0

[ 1 ] Bug #2010988 - CVE-2021-32762 redis: Integer overflow in redis-cli, redis-sentinel on some platforms

https://bugzilla.redhat.com/show_bug.cgi?id=2010988

[ 2 ] Bug #2010991 - CVE-2021-32687 redis: Integer overflow issue with intsets

https://bugzilla.redhat.com/show_bug.cgi?id=2010991

[ 3 ] Bug #2011000 - CVE-2021-32675 redis: Denial of service via Redis Standard Protocol (RESP) request

https://bugzilla.redhat.com/show_bug.cgi?id=2011000

[ 4 ] Bug #2011001 - CVE-2021-32672 redis: Out of bounds read in lua debugger protocol parser

https://bugzilla.redhat.com/show_bug.cgi?id=2011001

[ 5 ] Bug #2011004 - CVE-2021-32628 redis: Integer overflow bug in the ziplist data structure

https://bugzilla.redhat.com/show_bug.cgi?id=2011004

[ 6 ] Bug #2011010 - CVE-2021-32627 redis: Integer overflow issue with Streams

https://bugzilla.redhat.com/show_bug.cgi?id=2011010

[ 7 ] Bug #2011017 - CVE-2021-32626 redis: Lua scripts can overflow the heap-based Lua stack

https://bugzilla.redhat.com/show_bug.cgi?id=2011017

[ 8 ] Bug #2011020 - CVE-2021-41099 redis: Integer overflow issue with strings

https://bugzilla.redhat.com/show_bug.cgi?id=2011020

su -c 'dnf upgrade --advisory FEDORA-2021-aa94492a09' at the command

line. For more information, refer to the dnf documentation available at

https://dnf.readthedocs.io/en/latest/command_ref.html

All packages are signed with the Fedora Project GPG key. More details on the

GPG keys used by the Fedora Project can be found at

https://fedoraproject.org/security/

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