Bug 2290849 (CVE-2023-49441)

Summary:	CVE-2023-49441 dnsmasq: vulnerable to Integer Overflow via forward_query
Product:	[Other] Security Response	Reporter:	Rohit Keshri <rkeshri>
Component:	vulnerability	Assignee:	Product Security <prodsec-ir-bot>
Status:	NEW ---	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	pemensik
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	If docs needed, set a value
Doc Text:	A flaw was found in dnsmasq version 2.9. This vulnerability is due to an integer overflow via forward_query.	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:	2290850
Bug Blocks:	2290848

Description Rohit Keshri 2024-06-07 08:44:38 UTC

dnsmasq 2.9 is vulnerable to Integer Overflow via forward_query.

https://lists.thekelleys.org.uk/pipermail/dnsmasq-discuss/2023q4/017332.html
https://thekelleys.org.uk/gitweb/?p=dnsmasq.git%3Ba=commit%3Bh=65c2d6afd67a032f45f40d7e4d620f5d73e5f07d

Comment 1 Rohit Keshri 2024-06-07 08:49:45 UTC

Created dnsmasq tracking bugs for this issue:

Affects: fedora-all [bug 2290850]

Comment 2 Petr Menšík 2024-06-12 16:12:46 UTC

This issue should be fixed by upstream commit:
https://thekelleys.org.uk/gitweb/?p=dnsmasq.git;a=commit;h=65c2d6afd67a032f45f40d7e4d620f5d73e5f07d

Which is not used by our code, because we use HAVE_DNSSEC usually and HAVE_CRYPTOHASH in rhel7. Therefore we do not use built-in sha256 implementation, which needed the fix.