CVE-2025-40778

HIGH8.6

Cache poisoning attacks with unsolicited RRs

Published Oct 22, 2025

Modified 2 months ago

Details

Under certain circumstances, BIND is too lenient when accepting records from answers, allowing an attacker to inject forged data into the cache. This issue affects BIND 9 versions 9.11.0 through 9.16.50, 9.18.0 through 9.18.39, 9.20.0 through 9.20.13, 9.21.0 through 9.21.12, 9.11.3-S1 through 9.16.50-S1, 9.18.11-S1 through 9.18.39-S1, and 9.20.9-S1 through 9.20.13-S1.

References

WEBhttp://www.openwall.com/lists/oss-security/2025/10/22/1 DETECTIONhttps://gist.github.com/N3mes1s/f76b4a606308937b0806a5256bc1f918 ADVISORYhttps://kb.isc.org/docs/cve-2025-40778 ADVISORYhttps://www.cve.org/CVERecord?id=CVE-2025-40778

CVSS Analysis

CVSS v3.1

8.6

Exploitability

Attack Vector

NetworkAV:N

Attack Complexity

LowAC:L

Privileges Required

NonePR:N

User Interaction

NoneUI:N

Scope

ChangedS:C

Impact

Confidentiality

NoneC:N

Integrity

HighI:H

Availability

NoneA:N

8.6/CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:N

Weakness Type (CWE)

Other

CWE-349

Ecosystems

Timeline

PublishedOct 22, 2025

ModifiedNov 7, 2025