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>
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   
Fixed In Version: Doc Type: If docs needed, set a value
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2022-01-18 11:01:38 UTC Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
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).


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.