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: NEW
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: 2022-05-02 21:03 UTC (History)
19 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:

Attachments (Terms of Use)
Add an attachment (proposed patch, testcase, etc.)

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@trellix.com), 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?
Note You need to log in before you can comment on or make changes to this bug.