PT-2026-52209 · Nlnet · Nsd
Qifan Zhang
·
Publicado
2026-06-25
·
Atualizado
2026-06-25
·
CVE-2026-12244
CVSS v4.0
8.7
Alta
| Vetor | AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X |
If NSD is configured as secondary for a zone, the primary of that zone can crash NSD with an AXFR containing a DNS message with a special crafted SVCB RR with an rdata size of 65512, that let's an (uint16 t) variable that is used to allocate space needed for the RR wrap (because total size > 65535), causing a heap overflow. The attacker can perform a controlled (RCE class) head write of up to 65509 bytes
Correção
Integer Overflow
Heap Based Buffer Overflow
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Identificadores relacionados
Produtos afetados
Nsd