Bug 2129735 (CVE-2022-40188) - CVE-2022-40188 knot-resolver: CPU-expensive DoS by malicious domains
Summary: CVE-2022-40188 knot-resolver: CPU-expensive DoS by malicious domains
Keywords:
Status: CLOSED UPSTREAM
Alias: CVE-2022-40188
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
low
low
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 2129736 2129737
Blocks:
TreeView+ depends on / blocked
 
Reported: 2022-09-26 08:24 UTC by TEJ RATHI
Modified: 2022-11-28 02:27 UTC (History)
5 users (show)

Fixed In Version: knot-resolver 5.5.3
Clone Of:
Environment:
Last Closed: 2022-11-28 02:27:16 UTC
Embargoed:

Attachments (Terms of Use)

Description TEJ RATHI 2022-09-26 08:24:47 UTC 
Knot Resolver before 5.5.3 allows remote attackers to cause a denial of service (CPU consumption) because of algorithmic complexity. During an attack, an authoritative server must return large NS sets or address sets.

https://gitlab.nic.cz/knot/knot-resolver/-/merge_requests/1343#note_262558
https://www.knot-resolver.cz/2022-09-21-knot-resolver-5.5.3.html
Comment 1 TEJ RATHI 2022-09-26 08:25:13 UTC 
Created knot-resolver tracking bugs for this issue:

Affects: epel-all [bug 2129737]
Affects: fedora-all [bug 2129736]
Comment 2 Jakub Ruzicka 2022-10-03 05:56:34 UTC 
5.5.3 packages with fix for this issue already hit stable f35, f36, f37, el7, el8, el9, and rawhide:

https://bodhi.fedoraproject.org/updates/?search=knot-resolver-5.5.3
Comment 3 Product Security DevOps Team 2022-11-28 02:27:14 UTC 
This CVE Bugzilla entry is for community support informational purposes only as it does not affect a package in a commercially supported Red Hat product. Refer to the dependent bugs for status of those individual community products.
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