Resource Exhaustion Vulnerability in BIND Package - CVE-2024-11187

bind Updated 02 Oct 2025

Summary

29/01/2025

Disclosed on

N/A

Severity

Yes i

Fix available

Unrated

Severity

Not published

CVSS Score

ALPINE-CVE-2024-11187: It is possible to construct a zone such that some queries to it will generate responses containing numerous records in the Additional section. Affects bind versions < 9.18.33-r0. Fixed in 9.18.33-r0. How to fix ↓

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Background

BIND (Berkeley Internet Name Domain) is a widely used DNS server software that provides a way to translate domain names into IP addresses. It is essential for the functioning of the internet, enabling users to access websites using human-readable addresses. BIND is known for its robustness and flexibility, but like any software, it can have vulnerabilities that may be exploited by attackers. This specific vulnerability, identified as CVE-2024-11187, affects multiple versions of BIND across various Alpine Linux distributions.

Vulnerability Detail

The vulnerability allows an attacker to craft a DNS zone that generates responses with numerous records in the Additional section. When an authoritative server or resolver processes these specially crafted queries, it can lead to excessive resource consumption, potentially causing denial of service. This issue affects BIND versions 9.11.0 through 9.11.37, 9.16.0 through 9.16.50, 9.18.0 through 9.18.32, 9.20.0 through 9.20.4, 9.21.0 through 9.21.3, and their respective security releases.

How To Fix

Minimum fixed version

9.18.33-r0

This is the first release that contains the fix.

sudo apk add --upgrade bind

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Workaround

As a temporary workaround, you may consider limiting the number of queries that can be processed by your DNS server or implementing rate limiting to mitigate the impact of potential attacks. However, the best solution is to update to the patched version as mentioned above.

Conclusion

In summary, CVE-2024-11187 is a significant vulnerability affecting the BIND DNS server across multiple Alpine Linux versions. It is crucial to update to the patched version 9.18.33-r0 to mitigate the risk of resource exhaustion attacks. Additionally, utilizing tools like Vulert can help monitor and alert for such vulnerabilities in real-time.

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