Bug 2041806 (CVE-2021-40083) - CVE-2021-40083 knot-resolver: remote attacker can cause assertion failure
Summary: CVE-2021-40083 knot-resolver: remote attacker can cause assertion failure
Keywords:
Status: CLOSED UPSTREAM
Alias: CVE-2021-40083
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: 2041807 2041808
Blocks:
TreeView+ depends on / blocked
 
Reported: 2022-01-18 10:24 UTC by Dhananjay Arunesh
Modified: 2022-01-18 11:01 UTC (History)
5 users (show)

Fixed In Version:
Doc Type: If docs needed, set a value
Doc Text:
Clone Of:
Environment:
Last Closed: 2022-01-18 11:01:38 UTC
Embargoed:

Attachments (Terms of Use)

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.
Note You need to log in before you can comment on or make changes to this bug.