CVE-2026-81535: wolfSSH (wolfSSL Inc.)
Vulnerabilità critica, punteggio 9,1 su 10, in wolfSSH (wolfSSL Inc.). Sfruttabile da remoto, via rete, senza credenziali, senza che nessuno faccia nulla. Tipo: autorizzazione mancante; autorizzazione errata.
- Gravità
- 9,1 su 10 (critical)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N - Tipo di difetto
- CWE-862: autorizzazione mancante
CWE-863: autorizzazione errata - Pubblicata
- 7 ottobre 2026
Descrizione originale
In wolfSSH through 1.5.0 built with --enable-fwd, DoChannelOpen() in src/internal.c gates only direct-tcpip channel opens with the forwarding policy callback. forwarded-tcpip opens are admitted without an authorization check and are not capped in number, allowing a malicious SSH peer to make an endpoint allocate unbounded per-channel buffers for forwarding channels the application never authorized. A client also does not check a forwarded-tcpip open against the forwards it registered with a tcpip-forward request, as RFC 4254 section 7.2 requires, so a malicious server can open forwarding channels for addresses and ports the client never asked it to forward.