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ISC BIND: Parsing large DNS messages may cause excessive CPU load (CVE-2023-4408)

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ISC BIND: Parsing large DNS messages may cause excessive CPU load (CVE-2023-4408)

Severity
4
CVSS
(AV:L/AC:M/Au:N/C:P/I:P/A:P)
Published
02/15/2024
Created
02/17/2024
Added
02/15/2024
Modified
02/19/2024

Description

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.

Solution(s)

  • upgrade-isc-bind-latest

References

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