CVE-2024-0760: A flood of DNS messages over TCP may make the server unstable

Severity: high (CVSS 7.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 4.7% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2024-07-23 · updated 2026-06-17
Weakness: CWE-770

Description

A malicious client can send many DNS messages over TCP, potentially causing the server to become unstable while the attack is in progress. The server may recover after the attack ceases. Use of ACLs will not mitigate the attack. This issue affects BIND 9 versions 9.18.1 through 9.18.27, 9.19.0 through 9.19.24, and 9.18.11-S1 through 9.18.27-S1.

Affected products

ISC BIND: from 9.18.1 through 9.18.27; from 9.19.0 through 9.19.24; from 9.18.11-s1 through 9.18.27-s1

References

http://www.openwall.com/lists/oss-security/2024/07/23/1
http://www.openwall.com/lists/oss-security/2024/07/31/2
https://kb.isc.org/docs/cve-2024-0760
http://www.openwall.com/lists/oss-security/2024/07/23/1
https://kb.isc.org/docs/cve-2024-0760
https://security.netapp.com/advisory/ntap-20240731-0004/

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