Allocation of Resources Without Limits or Throttling Affecting bind9 package, versions <1:9.16.48-1


Severity

Recommended
0.0
high
0
10

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Threat Intelligence

EPSS
5.02% (94th percentile)

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  • Snyk IDSNYK-DEBIAN11-BIND9-6245319
  • published14 Feb 2024
  • disclosed14 Feb 2024

Introduced: 14 Feb 2024

CVE-2023-50387  (opens in a new tab)
CWE-770  (opens in a new tab)

How to fix?

Upgrade Debian:11 bind9 to version 1:9.16.48-1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream bind9 package and not the bind9 package as distributed by Debian. See How to fix? for Debian:11 relevant fixed versions and status.

Certain DNSSEC aspects of the DNS protocol (in RFC 4033, 4034, 4035, 6840, and related RFCs) allow remote attackers to cause a denial of service (CPU consumption) via one or more DNSSEC responses, aka the "KeyTrap" issue. One of the concerns is that, when there is a zone with many DNSKEY and RRSIG records, the protocol specification implies that an algorithm must evaluate all combinations of DNSKEY and RRSIG records.

References

CVSS Scores

version 3.1