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CVE PROGRAM SOURCE RECORD7.5 High

CVE-2023-4408

Parsing large DNS messages may cause excessive CPU load

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Status
Published
Published
Updated
Assigning organization
isc

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

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

ISC BIND 9

Default version status: unaffected

  • 9.0.0 to ≤ 9.16.45affected
  • 9.18.0 to ≤ 9.18.21affected
  • 9.19.0 to ≤ 9.19.19affected
  • 9.9.3-S1 to ≤ 9.11.37-S1affected
  • 9.16.8-S1 to ≤ 9.16.45-S1affected
  • 9.18.11-S1 to ≤ 9.18.21-S1affected

References