Excessive CPU Usage for DNSSEC-Validated 'KEY' Resource Records in BIND 9
CVE-2024-1975

7.5HIGH

Key Information:

Vendor
Isc
Status
Bind 9
Vendor
CVE Published:
23 July 2024

Badges

👾 Exploit Exists

Summary

A resource exhaustion vulnerability exists in BIND 9 software that can be exploited when a server hosts a zone containing a 'KEY' Resource Record, or when a resolver DNSSEC-validates a 'KEY' Resource Record from a DNSSEC-signed domain cached. Attackers can overwhelm resolver CPU resources with a continuous stream of SIG(0) signed requests, potentially leading to a denial of service condition. This affects multiple versions of BIND 9, including those from the 9.0.0 series to the latest releases.

Affected Version(s)

BIND 9 9.0.0 <= 9.11.37

BIND 9 9.16.0 <= 9.16.50

BIND 9 9.18.0 <= 9.18.27

References

https://kb.isc.org/docs/cve-2024-1975
vendor-advisory
http://www.openwall.com/lists/oss-security/2024/07/23/1
http://www.openwall.com/lists/oss-security/2024/07/31/2

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

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

.