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7.5 High

CVE-2023-4408 The DNS message parsing code in `named` includes a section whose computational complexity is overly high

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.

Affected products and versions

Product Affected versions Fixed in
BIND 9 9.19 9.19.0 → 9.19.19 No fix stated
BIND 9 9.18 9.18.0 → 9.18.21 No fix stated
BIND 9 9.16 9.16.8-S1 → 9.16.45-S1 No fix stated
BIND 9 9.9 9.9.3-S1 → 9.11.37-S1 No fix stated
BIND 9 9.0 9.0.0 → 9.16.45 No fix stated

References

Timeline

  1. Published
  2. Last modified

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