CVE-2019-6469

bind: an error in the EDNS Client Subnet (ECS) feature for recursive resolvers can cause BIND to exit with an assertion failure leading to DoS

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Severity

Moderate

Red Hat Product Security

5.9

CVSS 3.0

Review impact separately from score.

Published · May 30, 2019

Updated · November 22, 2025

Description

An error in the EDNS Client Subnet (ECS) feature for recursive resolvers can cause BIND to exit with an assertion failure when processing a response that has malformed RRSIGs. Versions affected: BIND 9.10.5-S1 -> 9.11.6-S1 of BIND 9 Supported Preview Edition.

Statement

This flaw only affects the BIND Supported Preview Edition version. Packages shipped with Red Hat Enterprise Linux are not affected by this flaw.

CVSS score applicability

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

Mitigation

No mitigation is specified in collected source.

CVSS / CWE

CVSS 3.0 · 5.9
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

CWE-20 · Improper Input Validation