CVE-2026-42944 NLnet Labs Unbound 1.14.0 up to and including version 1.25.0 has a vulnerability that results in heap overflow when…
Description
NLnet Labs Unbound 1.14.0 up to and including version 1.25.0 has a vulnerability that results in heap overflow when encoding multiple NSID and/or DNS Cookie EDNS and/or EDNS Padding options in the reply packet. The relevant options ('nsid', 'answer-cookie', 'pad-responses' (default)) need to be enabled for the vulnerability to be exploited. An adversary who can query Unbound can exploit the vulnerability by attaching multiple NSID and/or DNS Cookie EDNS and/or EDNS Padding options to the query. A flaw in the size calculation of the EDNS field truncates the correct value which allows the encoder to overflow the available space when writing. Those two combined lead to a heap overflow write of Unbound controlled data and eventually a crash. Unbound 1.25.1 contains a patch with a fix to de-duplicate the EDNS options and a fix to prevent truncation of the EDNS field size calculation.
Produits et versions touchés
| Produit | Versions touchées | Corrigé en |
|---|---|---|
| unbound 1.14 | 1.14.0 → < 1.25.1 | 1.25.1 |
| Red Hat Enterprise Linux AppStream (v. 10) | Versions non publiées | |
| Red Hat Enterprise Linux AppStream (v. 8) | 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 Enterprise Linux 7 | Versions non publiées |
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| Produit | Versions touchées | Corrigé en |
|---|---|---|
| Red Hat OpenShift Container Platform 4 | Versions non publiées | |
| Red Hat Enterprise Linux 10 | Versions non publiées | |
| Red Hat Enterprise Linux 8 | Versions non publiées | |
| Red Hat Enterprise Linux 9 | Versions non publiées |
Références
- www.nlnetlabs.nl www.nlnetlabs.nl
Chronologie
- Publiée
- Dernière modification