ALPINE-CVE-2020-25683

ALPINE-CVE-2020-25683

Cette page présente des faits issus de sources publiques. Consultez l’avis original avant toute mise à jour.

A flaw was found in dnsmasq before version 2.83. A heap-based buffer overflow was discovered in dnsmasq when DNSSEC is enabled and before it validates the received DNS entries. A remote attacker, who can create valid DNS replies, could use this flaw to cause an overflow in a heap-allocated memory. This flaw is caused by the lack of length checks in rfc1035.c:extract_name(), which could be abused to make the code execute memcpy() with a negative size in get_rdata() and cause a crash in dnsmasq, resulting in a denial of service. The highest threat from this vulnerability is to system availability.

CVSS 5.9 · Moyenne · Correctif disponible

Publication

2021-01-20T16:15:14.087Z

Mise à jour

2026-10-26T11:17:55.155847182Z

Pile logicielle: system

Vérifiez votre serveur →