Bug 2057075 (CVE-2022-0934) - CVE-2022-0934 dnsmasq: Heap use after free in dhcp6_no_relay
Summary: CVE-2022-0934 dnsmasq: Heap use after free in dhcp6_no_relay
Keywords:
Status: CLOSED ERRATA
Alias: CVE-2022-0934
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 2063289 2063290
Blocks: 2057078
TreeView+ depends on / blocked
 
Reported: 2022-02-22 17:25 UTC by Pedro Sampaio
Modified: 2023-01-05 10:03 UTC (History)
20 users (show)

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.
Clone Of:
Environment:
Last Closed: 2022-12-05 23:33:20 UTC
Embargoed:

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2022:7633 0 None None None 2022-11-08 09:59:20 UTC
Red Hat Product Errata RHSA-2022:8070 0 None None None 2022-11-15 10:09:12 UTC

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
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