CVE-2023-4408
moderate-risk
Published 2024-02-13
The DNS message parsing code in `named` includes a section whose computational complexity is overly high. It does not cause problems for typical DNS traffic, but crafted queries and responses may cause excessive CPU load on the affected `named` instance by exploiting this flaw. This issue affects both authoritative servers and recursive resolvers. This issue affects BIND 9 versions 9.0.0 through 9.16.45, 9.18.0 through 9.18.21, 9.19.0 through 9.19.19, 9.9.3-S1 through 9.11.37-S1, 9.16.8-S1 through 9.16.45-S1, and 9.18.11-S1 through 9.18.21-S1.
Do I need to act?
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0.29% chance of exploitation
EPSS score — low exploit probability
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Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
7
CVSS 7.5/10
High
NETWORK
/ LOW complexity
Affected Products (18)
Affected Vendors
References (14)
Vendor Advisory
https://kb.isc.org/docs/cve-2023-4408
Third Party Advisory
https://security.netapp.com/advisory/ntap-20240426-0001/
Vendor Advisory
https://kb.isc.org/docs/cve-2023-4408
Third Party Advisory
https://security.netapp.com/advisory/ntap-20240426-0001/
46
/ 100
moderate-risk
Severity
26/34 · High
Exploitability
1/34 · Minimal
Exposure
19/34 · Moderate