CVE-2025-40780: high-severity vulnerability in ISC BIND 9
Cache poisoning due to weak PRNG
Published · Updated
21Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 8.6epss 0.5%
exploitation probability
0.5%top 62% of all CVEs
observed exploitation
nono source reports it
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.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:N
Affected products
ISC · BIND 9Related CVEs — ISC BIND 9
In the same product, most dangerous first.
CVE-2018-5740HIGHA flaw in the "deny-answer-aliases" feature can cause an assertion failure in namedEPSS 59.6%CVE-2022-3736HIGHnamed configured to answer from stale cache may terminate unexpectedly while processing RRSIG queriesEPSS 48.7%CVE-2017-3145HIGHImproper fetch cleanup sequencing in the resolver can cause named to crashEPSS 27.9%CVE-2022-3488HIGHnamed may terminate unexpectedly when processing ECS options in repeated responses to iterative queriesEPSS 19.2%CVE-2024-12705HIGHDNS-over-HTTPS implementation suffers from multiple issues under heavy query loadEPSS 18.4%CVE-2017-3143HIGHAn error in TSIG authentication can permit unauthorized dynamic updatesEPSS 18.3%