CVE-2024-1975

SIG(0) can be used to exhaust CPU resources

Description

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.

Remediation

Solution:

  • 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.

Workaround:

  • No workarounds known.

Category

7.5
CVSS
Severity: High
CVSS 3.1 •
EPSS 0.39%
Vendor Advisory isc.org
Affected: ISC BIND 9
Published at:
Updated at:

References

Link Tags
https://kb.isc.org/docs/cve-2024-1975 vendor advisory
http://www.openwall.com/lists/oss-security/2024/07/23/1
http://www.openwall.com/lists/oss-security/2024/07/31/2
https://security.netapp.com/advisory/ntap-20240731-0002/

Frequently Asked Questions

What is the severity of CVE-2024-1975?
CVE-2024-1975 has been scored as a high severity vulnerability.
How to fix CVE-2024-1975?
To fix CVE-2024-1975: 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.
Is CVE-2024-1975 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2024-1975 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2024-1975?
CVE-2024-1975 affects ISC BIND 9.
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