Assertion Failure in Knot Resolver Affects Network Security Solutions
CVE-2021-40083

7.5HIGH

Key Information:

Vendor

Nic

Status
Knot Resolver
Vendor
CVE Published:
25 August 2021

What is CVE-2021-40083?

Knot Resolver versions before 5.3.2 are susceptible to an assertion failure vulnerability. This issue arises in specific edge cases where a remote attacker can exploit NSEC3 with excessive iterations utilized for a positive wildcard proof. Such exploitation may lead to stability issues in the resolver, compromising the integrity of network services. It is crucial for users to update to the latest version of Knot Resolver to mitigate potential risks.

References

https://gitlab.nic.cz/knot/knot-resolver/-/merge_requests...
x_refsource_MISC

CVSS V3.1

Score:
7.5
Severity:
HIGH
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.