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

Badges

👾 Exploit Exists

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
https://security.netapp.com/advisory/ntap-20240503-0005/

CVSS V3.1

Score:
5.3
Severity:
MEDIUM
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

Credit

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