Bug 2041806 (CVE-2021-40083)

Summary: CVE-2021-40083 knot-resolver: remote attacker can cause assertion failure
Product: [Other] Security Response Reporter: Dhananjay Arunesh <darunesh>
Component: vulnerabilityAssignee: Red Hat Product Security <security-response-team>
Status: CLOSED UPSTREAM QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: dns-sig, jakub.ruzicka, jv+fedora, pspacek, tkrizek
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
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Last Closed: 2022-01-18 11:01:38 UTC Type: ---
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Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:
Bug Depends On: 2041807, 2041808    
Bug Blocks:    

Description Dhananjay Arunesh 2022-01-18 10:24:24 UTC
Knot Resolver before 5.3.2 is prone to an assertion failure, triggerable by a remote attacker in an edge case (NSEC3 with too many iterations used for a positive wildcard proof).

References:
https://gitlab.nic.cz/knot/knot-resolver/-/merge_requests/1169

Comment 1 Dhananjay Arunesh 2022-01-18 10:24:57 UTC
Created knot-resolver tracking bugs for this issue:

Affects: epel-all [bug 2041808]
Affects: fedora-all [bug 2041807]

Comment 2 Product Security DevOps Team 2022-01-18 11:01:37 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.