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9.1 Critique

CVE-2026-33278 NLnet Labs Unbound 1.19.1 up to and including version 1.25.0 has a vulnerability in the DNSSEC validator that enables…

Description

NLnet Labs Unbound 1.19.1 up to and including version 1.25.0 has a vulnerability in the DNSSEC validator that enables denial of service and possible remote code execution as a result of deep copying a data structure and erroneously overwriting a destination pointer. An adversary can exploit the vulnerability by controlling a malicious signed zone and querying a vulnerable Unbound. When DS sub-queries need to suspend validation due to NSEC3 computational budget exhaustion (introduced in Unbound 1.19.1), Unbound deep-copies response messages to preserve them across memory region teardown. A struct-assignment bug overwrites the destination's pointer with the source's pointer. After the sub-query region is freed, the resumed validator dereferences this dangling pointer, triggering a crash or potentially enabling arbitrary code execution. Unbound 1.25.1 contains a patch with a fix to preserve the correct pointer when deep copying the data structure.

Produits et versions touchés

Produit Versions touchées Corrigé en
unbound 1.19 1.19.1 → < 1.25.1 1.25.1
Red Hat Enterprise Linux AppStream (v. 10) Versions non publiées
Red Hat Enterprise Linux AppStream (v. 9) Versions non publiées
Red Hat Enterprise Linux CodeReady Linux Builder (v. 10) Versions non publiées
Red Hat Enterprise Linux CodeReady Linux Builder (v. 9) Versions non publiées
Red Hat Hardened Images 1.25 premières → < 1.25.1-0.1.hum1 1.25.1-0.1.hum1
Red Hat Enterprise Linux 6 Versions non publiées
Red Hat OpenShift Container Platform 4 Versions non publiées
Red Hat Enterprise Linux 7 Versions non publiées
Afficher les 3 autres branches
Produit Versions touchées Corrigé en
Red Hat Enterprise Linux 8 Versions non publiées
Red Hat Enterprise Linux 10 Versions non publiées
Red Hat Enterprise Linux 9 Versions non publiées

Références

Chronologie

  1. Publiée
  2. Dernière modification

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