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

Summary

If a server hosts a zone containing a "KEY" Resource Record, or a resolver DNSSEC-validates a "KEY" Resource Record from a DNSSEC-signed domain in cache, a client can exhaust resolver CPU resources by sending a stream of SIG(0) signed requests. This issue affects BIND 9 versions 9.0.0 through 9.11.37, 9.16.0 through 9.16.50, 9.18.0 through 9.18.27, 9.19.0 through 9.19.24, 9.9.3-S1 through 9.11.37-S1, 9.16.8-S1 through 9.16.49-S1, and 9.18.11-S1 through 9.18.27-S1.

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:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Collectors

NVD DatabaseMitre Database
.