{"id":"CVE-2025-40775","state":"PUBLISHED","title":"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.\nThis issue affects BIND 9 versions 9.20.0 through 9.20.8 and 9.21.0 through 9.21.7.","publishedAt":"2025-05-21T12:35:01.862Z","updatedAt":"2025-05-23T13:11:08.588Z","severity":{"score":7.5,"label":"High","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","source":"isc"},"assigner":"isc","products":["ISC BIND 9"],"affected":[{"vendor":"ISC","product":"BIND 9","defaultStatus":"unaffected","versions":[{"version":"9.20.0","status":"affected","lessThanOrEqual":"9.20.8","versionType":"custom"},{"version":"9.21.0","status":"affected","lessThanOrEqual":"9.21.7","versionType":"custom"}]}],"references":["https://kb.isc.org/docs/cve-2025-40775","http://www.openwall.com/lists/oss-security/2025/05/21/1","https://security.netapp.com/advisory/ntap-20250523-0001/"],"weaknesses":["CWE-232"],"ingestedAt":"2026-10-29T20:09:09.358Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2025/40xxx/CVE-2025-40775.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.1","cveMetadata":{"cveId":"CVE-2025-40775","state":"PUBLISHED","datePublished":"2025-05-21T12:35:01.862Z","dateUpdated":"2025-05-23T13:11:08.588Z","assignerShortName":"isc","assignerOrgId":"404fd4d2-a609-4245-b543-2c944a302a22","dateReserved":"2025-04-16T08:44:49.856Z"},"containers":{"cna":{"title":"DNS message with invalid TSIG causes an assertion failure","descriptions":[{"lang":"en","value":"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.\nThis issue affects BIND 9 versions 9.20.0 through 9.20.8 and 9.21.0 through 9.21.7."}],"affected":[{"vendor":"ISC","product":"BIND 9","defaultStatus":"unaffected","versions":[{"version":"9.20.0","status":"affected","lessThanOrEqual":"9.20.8","versionType":"custom"},{"version":"9.21.0","status":"affected","lessThanOrEqual":"9.21.7","versionType":"custom"}]}],"references":[{"url":"https://kb.isc.org/docs/cve-2025-40775","name":"CVE-2025-40775","tags":["vendor-advisory"]}],"metrics":[{"cvssV3_1":{"version":"3.1","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"HIGH","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","baseScore":7.5,"baseSeverity":"HIGH"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-232","lang":"en","type":"CWE","description":"CWE-232 Improper Handling of Undefined Values"}]}],"providerMetadata":{"shortName":"isc","orgId":"404fd4d2-a609-4245-b543-2c944a302a22","dateUpdated":"2025-05-21T12:35:01.862Z"},"datePublic":"2025-05-21T00:00:00.000Z","impacts":[{"descriptions":[{"lang":"en","value":"Denial-of-service.  By sending specific messages to the server, an attacker can cause `named` to terminate unexpectedly."}]}],"workarounds":[{"lang":"en","value":"No workarounds known."}],"exploits":[{"lang":"en","value":"This flaw was discovered in internal testing. We are not aware of any active exploits."}],"solutions":[{"lang":"en","value":"Upgrade to the patched release most closely related to your current version of BIND 9: 9.20.9 or 9.21.8."}],"source":{"discovery":"INTERNAL"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2025-05-21T13:19:58.662181Z","id":"CVE-2025-40775","options":[{"Exploitation":"none"},{"Automatable":"yes"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2025-05-21T13:20:18.795Z"}},{"title":"CVE Program Container","references":[{"url":"http://www.openwall.com/lists/oss-security/2025/05/21/1"},{"url":"https://security.netapp.com/advisory/ntap-20250523-0001/"}],"providerMetadata":{"shortName":"CVE","orgId":"af854a3a-2127-422b-91ae-364da2661108","dateUpdated":"2025-05-23T13:11:08.588Z"}}]}}}