We use these services and cookies to improve your user experience. You may opt out if you wish, however, this may limit some features on this site.

Please see our statement on Data Privacy.

Crisp.chat (Helpdesk and Chat)

Ok

THREATINT
PUBLISHED

CVE-2025-40775

DNS message with invalid TSIG causes an assertion failure



Description

When an incoming DNS protocol message includes a Transaction Signature (TSIG), BIND always checks it. If the TSIG contains an invalid value in the algorithm field, BIND immediately aborts with an assertion failure. This issue affects BIND 9 versions 9.20.0 through 9.20.8 and 9.21.0 through 9.21.7.

Reserved 2025-04-16 | Published 2025-05-21 | Updated 2025-05-23 | Assigner isc


HIGH: 7.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Problem types

CWE-232 Improper Handling of Undefined Values

Product status

Default status
unaffected

9.20.0
affected

9.21.0
affected

References

kb.isc.org/docs/cve-2025-40775 (CVE-2025-40775) vendor-advisory

cve.org (CVE-2025-40775)

nvd.nist.gov (CVE-2025-40775)

Download JSON

Share this page
https://cve.threatint.eu/CVE/CVE-2025-40775

Support options

Helpdesk Chat, Email, Knowledgebase
© Copyright 2025 THREATINT
Made in Cyprus with ❤ + ☼
 System status
Find us on
Data Privacy
Terms of Use
Logo BSI Allianz für Cyber-Sicherheit
Error loading Crisp.chat. Please check your web content filter and browser plugins.