Named Resolver May Experience Infinite Loop of Cache Maintenance
CVE-2023-6516

7.5HIGH

Key Information:

Vendor

Isc
Status
Bind 9
Vendor
CVE Published:
13 February 2024

Badges

👾 Exploit Exists

What is CVE-2023-6516?

The issue arises in BIND 9's cache database management, where asynchronous cleanup processes may become overwhelmed by ongoing repetitive query patterns. This can result in an exponential growth of queued cleanup events, eventually exceeding the predefined maximum cache size limit. This vulnerability impacts the ability of the resolver to efficiently manage memory and maintain optimal performance over time, leading to potential service disruptions in environments relying on BIND 9 for DNS resolution.

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Affected Version(s)

BIND 9 9.16.0 <= 9.16.45

BIND 9 9.16.8-S1 <= 9.16.45-S1

References

https://kb.isc.org/docs/cve-2023-6516
vendor-advisory
http://www.openwall.com/lists/oss-security/2024/02/13/1
https://lists.fedoraproject.org/archives/list/package-ann...

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

Credit

ISC would like to thank Infoblox for bringing this vulnerability to our attention.
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