Denial of Service Vulnerability in DNS Protocol Affecting Unbound and DnsServer
CVE-2024-33655

7.5HIGH

Key Information:

Vendor

NLnet Labs

Status
Unbound
Vendor
CVE Published:
6 June 2024

What is CVE-2024-33655?

A vulnerability in the DNS protocol has been identified that allows remote attackers to launch denial of service attacks by exploiting legitimate DNS features. By manipulating DNS queries, attackers can cause systems to accumulate requests. This buildup results in delayed responses that are eventually sent in quick succession, leading to increased resource consumption and potential service interruption. This issue, known as the 'DNSBomb' attack, highlights the need for enhanced security measures in DNS server configurations to protect against such malicious traffic amplification tactics.

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References

https://datatracker.ietf.org/doc/html/rfc1035
https://nlnetlabs.nl/projects/unbound/security-advisories/
https://github.com/TechnitiumSoftware/DnsServer/blob/mast...

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

JSON
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