CVE-2026-3591

MEDIUM

5.4

Beschreibung

A use-after-return vulnerability exists in the `named` server when handling DNS queries signed with SIG(0). Using a specially-crafted DNS request, an attacker may be able to cause an ACL to improperly (mis)match an IP address. In a default-allow ACL (denying only specific IP addresses), this may lead to unauthorized access. Default-deny ACLs should fail-secure. This issue affects BIND 9 versions 9.20.0 through 9.20.20, 9.21.0 through 9.21.19, and 9.20.9-S1 through 9.20.20-S1. BIND 9 versions 9.18.0 through 9.18.46 and 9.18.11-S1 through 9.18.46-S1 are NOT affected.

CVE Details

CVSS v3.1 Bewertung5.4

SchweregradMEDIUM

CVSS VektorCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N

AngriffsvektorNETWORK

KomplexitatLOW

Erforderliche PrivilegienLOW

BenutzerinteraktionNONE

Veroffentlicht3/25/2026

Zuletzt geandert3/25/2026

Quellenvd

Honeypot-Sichtungen0

Schwachen (CWE)

CWE-305CWE-562

Referenzen

https://downloads.isc.org/isc/bind9/9.20.21(security-officer@isc.org)

https://downloads.isc.org/isc/bind9/9.21.20(security-officer@isc.org)

https://kb.isc.org/docs/cve-2026-3591(security-officer@isc.org)

IOC Korrelationen

Keine Korrelationen erfasst

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