Bug 2013499 (CVE-2021-32765)

Summary:	CVE-2021-32765 hiredis: an integer overflow may occur if provided maliciously crafted or corrupted RESP mult-bulk protocol data
Product:	[Other] Security Response	Reporter:	Marian Rehak <mrehak>
Component:	vulnerability	Assignee:	Nobody <nobody>
Status:	NEW ---	QA Contact:
Severity:	high	Docs Contact:
Priority:	high
Version:	unspecified	CC:	bcoca, bdettelb, davidn, gblomqui, jcammara, jhardy, jobarker, kevin, mabashia, nathans, osapryki, relrod, rpetrell, smcdonal, tkuratom
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	hiredis 1.0.1	Doc Type:	If docs needed, set a value
Doc Text:	An integer overflow flaw when parsing array replies was found in hiredis, which leads to a buffer overflow and subsequent code execution. This flaw allows a remote attacker to execute arbitrary commands and craft a malicious payload to execute commands on the system. 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:	2013500
Bug Blocks:	2013502

Description Marian Rehak 2021-10-13 04:45:39 UTC

Hiredis is vulnurable to integer overflow if provided maliciously crafted or corrupted `RESP` `mult-bulk` protocol data. When parsing `multi-bulk` (array-like) replies, hiredis fails to check if `count * sizeof(redisReply*)` can be represented in `SIZE_MAX`. If it can not, and the `calloc()` call doesn't itself make this check, it would result in a short allocation and subsequent buffer overflow.

Upstream Advisory:

https://github.com/redis/hiredis/security/advisories/GHSA-hfm9-39pp-55p2

Comment 5 Tomas Hoger 2022-01-26 10:26:15 UTC

Created hiredis tracking bugs for this issue:

Affects: fedora-all [bug 2013500]