CVE-2023-4408

Summary

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 Software

VendorProductVersion RangeStatus
ISCBIND 99.0.0 <= 9.16.45affected
ISCBIND 99.18.0 <= 9.18.21affected
ISCBIND 99.19.0 <= 9.19.19affected
ISCBIND 99.9.3-S1 <= 9.11.37-S1affected
ISCBIND 99.16.8-S1 <= 9.16.45-S1affected
ISCBIND 99.18.11-S1 <= 9.18.21-S1affected

Weaknesses

Workarounds

No workarounds known.

ADP Enrichment

CISA ADP Vulnrichment

  • SSVC:
  • Exploitation: none
    • Automatable: no
    • Technical Impact: partial

CVE Program Container

Additional References

References