Bug 2057075 (CVE-2022-0934)

Summary:	CVE-2022-0934 dnsmasq: Heap use after free in dhcp6_no_relay
Product:	[Other] Security Response	Reporter:	Pedro Sampaio <psampaio>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED ERRATA	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	bdettelb, bishop, code, dbecker, dns-sig, dougsland, eglynn, jburrell, jjoyce, jschluet, lhh, lpeer, mburns, pemensik, sclewis, security-response-team, slinaber, spower, veillard, vkumar
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 single-byte, non-arbitrary write/use-after-free flaw was found in dnsmasq. This flaw allows an attacker who sends a crafted packet processed by dnsmasq, potentially causing a denial of service.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2022-12-05 23:33:20 UTC	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:	2063289, 2063290
Bug Blocks:	2057078

Description Pedro Sampaio 2022-02-22 17:25:53 UTC

A flaw was found in dnsmasq. A heap use after free issue in the dhcp6 server may lead to remote denial of service via crafted packet.

References:

https://lists.thekelleys.org.uk/pipermail/dnsmasq-discuss/2022q1/016272.html

Comment 1 Petr Menšík 2022-03-11 11:34:13 UTC

This flaw were found independently also by Richard Johnson of Trellix ATR (richard.johnson), reported few days after me to upstream. Should we wait for CVE assignment or fix it just without it? It were not yet made public as far as I know.

Comment 8 juneau 2022-03-29 12:42:09 UTC

marking OSD4 affected/wontfix; dnsmasq present but dhcp6 not used

Comment 12 Todd Cullum 2022-04-04 19:54:21 UTC

Upstream patch commit: https://thekelleys.org.uk/gitweb/?p=dnsmasq.git;a=commit;h=03345ecefeb0d82e3c3a4c28f27c3554f0611b39

Comment 13 Petr Menšík 2022-05-02 21:03:43 UTC

I have just checked https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-0934 and it is still reserved only. Could that be updated also?

Comment 14 errata-xmlrpc 2022-11-08 09:59:19 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2022:7633 https://access.redhat.com/errata/RHSA-2022:7633

Comment 15 errata-xmlrpc 2022-11-15 10:09:10 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9

Via RHSA-2022:8070 https://access.redhat.com/errata/RHSA-2022:8070

Comment 16 Product Security DevOps Team 2022-12-05 23:33:18 UTC

This bug is now closed. Further updates for individual products will be reflected on the CVE page(s):

https://access.redhat.com/security/cve/cve-2022-0934

Comment 18 errata-xmlrpc 2024-03-27 15:05:51 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8.6 Extended Update Support

Via RHSA-2024:1545 https://access.redhat.com/errata/RHSA-2024:1545