Improper Verification of Cryptographic Signature Affecting bind-utils-debuginfo package, versions <32:9.18.50-1.amzn2023.0.3


Severity

Recommended
high

Based on Amazon Linux security rating.

Threat Intelligence

EPSS
0.24% (14th percentile)

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  • Snyk IDSNYK-AMZN2023-BINDUTILSDEBUGINFO-20247328
  • published29 Sept 2026
  • disclosed16 Sept 2026

Introduced: 16 Sep 2026

CVE-2026-19033  (opens in a new tab)
CWE-347  (opens in a new tab)

How to fix?

Upgrade Amazon-Linux:2023 bind-utils-debuginfo to version 32:9.18.50-1.amzn2023.0.3 or higher.
This issue was patched in ALAS2023-2026-3137.

NVD Description

Note: Versions mentioned in the description apply only to the upstream bind-utils-debuginfo package and not the bind-utils-debuginfo package as distributed by Amazon-Linux. See How to fix? for Amazon-Linux:2023 relevant fixed versions and status.

For a secondary zone with transfers restricted by TSIG, named may start to serve the data provided in a zone transfer before the final message with the TSIG signature arrives. This could allow an attacker that does not actually possess a valid TSIG signature to send unauthorized zone contents to a secondary server. Although no TSIG signature ever arrives, named does not rollback to the pre-transfer state. To exploit the vulnerability, the transfer must be a multi-message TCP IXFR, as described by RFC 8945. This issue affects BIND 9 versions 9.11.0 through 9.18.50, 9.20.0 through 9.20.27, 9.21.0 through 9.21.25, 9.11.3-S1 through 9.18.50-S1, and 9.20.9-S1 through 9.20.27-S1.

CVSS Base Scores

version 3.1