Large ECS Record Cache Impairs Query Performance

CVE-2023-5680

5.3MEDIUM

Key Information

Vendor
ISC
Status
BIND 9
Vendor
CVE Published:
13 February 2024

Summary

If a resolver cache has a very large number of ECS records stored for the same name, the process of cleaning the cache database node for this name can significantly impair query performance. This issue affects BIND 9 versions 9.11.3-S1 through 9.11.37-S1, 9.16.8-S1 through 9.16.45-S1, and 9.18.11-S1 through 9.18.21-S1.

Affected Version(s)

BIND 9 9.11.3-S1 <= 9.11.37-S1

BIND 9 9.16.8-S1 <= 9.16.45-S1

BIND 9 9.18.11-S1 <= 9.18.21-S1

References

https://kb.isc.org/docs/cve-2023-5680
vendor-advisory

CVSS V3.1

Score:
5.3
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Collectors

NVD DatabaseMitre Database

Credit

ISC would like to thank Yann Kerherve and Ask Bjørn Hansen for bringing this vulnerability to our attention.
.