Bug 2010988 (CVE-2021-32762)

Summary:	CVE-2021-32762 redis: Integer overflow in redis-cli, redis-sentinel on some platforms
Product:	[Other] Security Response	Reporter:	Pedro Sampaio <psampaio>
Component:	vulnerability	Assignee:	Nobody <nobody>
Status:	NEW ---	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	agerstmayr, amackenz, amasferr, apevec, bcoca, bdettelb, caswilli, chazlett, dbecker, fabian.deutsch, fedora, gblomqui, gparvin, hhorak, jal233, jcammara, jhardy, jjoyce, jobarker, jorton, jschluet, jwong, kaycoth, lhh, lpeer, mabashia, mburns, mkudlej, nathans, pahickey, rcollet, redis-maint, rhos-maint, rpetrell, sclewis, slinaber, smcdonal, stcannon, tjochec, tkuratom, vmugicag
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	redis 6.2.6, redis 6.0.16, redis 5.0.14	Doc Type:	If docs needed, set a value
Doc Text:	An integer overflow issue leading to heap buffer overflow was found in the `hiredis` library. The "redis-cli" command-line tool and "redis-sentinel" service may be vulnerable to this flaw when parsing specially crafted, large multi-bulk network replies. This flaw allows a remote attacker to corrupt the heap and potentially trigger remote code execution. The highest threat from this vulnerability is to confidentiality, integrity, as well as system availability.	Story Points:	---
Clone Of:		Environment:
Last Closed:		Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:	2011189, 2012207, 2012208, 2012927, 2015849, 2015850
Bug Blocks:	2011061

Description Pedro Sampaio 2021-10-05 17:55:07 UTC

Redis is an open source, in-memory database that persists on disk. The redis-cli command line tool and redis-sentinel service may be vulnerable to integer overflow when parsing specially crafted large multi-bulk network replies. This is a result of a vulnerability in the underlying hiredis library which does not perform an overflow check before calling the calloc() heap allocation function. This issue only impacts systems with heap allocators that do not perform their own overflow checks. Most modern systems do and are therefore not likely to be affected. Furthermore, by default redis-sentinel uses the jemalloc allocator which is also not vulnerable. The problem is fixed in Redis versions 6.2.6, 6.0.16 and 5.0.14.

References:

https://github.com/redis/redis/security/advisories/GHSA-833w-8v3m-8wwr
https://github.com/redis/redis/commit/0215324a66af949be39b34be2d55143232c1cb71

Comment 4 Mauro Matteo Cascella 2021-10-08 14:59:30 UTC

Created redis tracking bugs for this issue:

Affects: epel-7 [bug 2012208]
Affects: fedora-all [bug 2012207]

Comment 13 Tapas Jena 2022-01-11 12:43:19 UTC

The analysis for Ansible components i.e. AAP 1.2 need to be rectified here. Ansible doesn't consume REDIS directly i.e. Its not a direct dependency for AAP 1.2. It consumes Redis from underlying platform i.e. RHEL. Since, RHEL 8 is not affected by this vulnerability, marking AAP 1.2 as "Not Affected" as well.