high
7.5
CWE
770
Advisory Published
CVE Published
Advisory Published
Updated

CVE-2024-1975: SIG(0) can be used to exhaust CPU resources

First published: Fri Jul 19 2024(Updated: )

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.

Credit: security-officer@isc.org security-officer@isc.org

Affected SoftwareAffected VersionHow to fix
F5 BIG-IP DNS>=17.1.0<=17.1.1
17.1.2
F5 BIG-IP DNS>=16.1.0<=16.1.5
F5 BIG-IP DNS>=15.1.0<=15.1.10
debian/bind9
1:9.16.50-1~deb11u2
1:9.16.50-1~deb11u3
1:9.18.28-1~deb12u2
1:9.18.33-1~deb12u2
1:9.20.4-4
1:9.20.5-1

Remedy

Upgrade to the patched release most closely related to your current version of BIND 9: 9.18.28, 9.20.0, or 9.18.28-S1.

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Reference Links

Parent vulnerabilities

(Appears in the following advisories)

Frequently Asked Questions

  • What is the severity of CVE-2024-1975?

    CVE-2024-1975 has been classified with a significant severity due to its potential to exhaust resolver CPU resources.

  • How do I fix CVE-2024-1975?

    To fix CVE-2024-1975, update BIND 9 to versions 1:9.16.50-1~deb11u2, 1:9.16.50-1~deb11u1, 1:9.18.28-1~deb12u2, or 1:9.20.4-4, or upgrade your F5 BIG-IP (DNS) to version 17.1.2 or above.

  • Which software is affected by CVE-2024-1975?

    CVE-2024-1975 affects BIND 9 and F5 BIG-IP (DNS) in specified version ranges.

  • What types of attacks does CVE-2024-1975 facilitate?

    CVE-2024-1975 facilitates denial-of-service attacks by exhausting CPU resources through SIG(0) signed requests.

  • Is a workaround available for CVE-2024-1975?

    There is no mention of a specific workaround for CVE-2024-1975; upgrading to the patched versions is recommended.

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