CVE-2025-40780
Cache poisoning due to weak PRNG
Description
In specific circumstances, due to a weakness in the Pseudo Random Number Generator (PRNG) that is used, it is possible for an attacker to predict the source port and query ID that BIND will use. This issue affects BIND 9 versions 9.16.0 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, 9.16.8-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.
No summary for this CVE yet.
CVSS Vector Breakdown
Exploitability
AV:NAttack VectorNetwork
AC:LAttack ComplexityLow
PR:NPrivileges RequiredNone
UI:NUser InteractionNone
Scope
S:CScopeChanged
Impact
C:NConfidentialityNone
I:HIntegrityHigh
A:NAvailabilityNone
Weaknesses
Affected Products
Internet Systems Consortium
oss-project·USaka isc
ООО «Ред Софт»
commercial·RUaka red soft
Canonical Ltd.
commercial·GBaka canonical
АО «ИВК»
commercial·RUaka ivk
ООО «РусБИТех-Астра»
commercial·RUaka rusbitech-astra
АО «СберТех»
commercial·RUaka ao sbertech, сбертех
and 2 more affected products View all →
Exploitability
0 exploit sources identified
Exploit details including PoC links, Metasploit modules, and scanner templates are available after registration.
View exploit details Official Patch Available
Workaround Available
References
https://ubuntu.com/security/CVE-2025-40780
ubuntu.com
https://dbugs.ptsecurity.com/vulnerability/PT-2025-43373
dbugs.ptsecurity.com
https://kb.isc.org/docs/cve-2025-40780
kb.isc.org
and 7 more references View all →
Unlock Complete Vulnerability Intelligence
Get the full picture for CVE-2025-40780 and every CVE in our database. Create a free account — no credit card required.
Create Free AccountPlain-language analysis
Impact assessment and exploitation scenario in plain English
Attack graph visualization
Interactive attack path and kill chain mapping
Exploit details & PoC links
ExploitDB, Metasploit, GitHub PoCs with direct links
Nuclei scanner templates
Ready-to-use vulnerability scanner templates
Full remediation guide
Patch instructions, workarounds, and compliance impact
Interactive AI chat
Ask questions about this vulnerability in natural language
Related vulnerabilities
Semantically similar CVEs and attack patterns
REST API & MCP access
Integrate vulnerability data into your workflows