CVE-2026-81535: falha de média gravidade em wolfSSL Inc. wolfSSH
wolfSSH SSH client accepts unsolicited forwarded-tcpip channel opens without an authorization check
Publicada em
13Vexday Risk Score
Sem sinal de exploração. Nenhum artefato público de exploração conhecido até agora.
ssvc Trackcvss 6.3epss 0.3%
probabilidade de exploração
0.3%top 82% das CVEs
exploração observada
nãonenhuma fonte reporta
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.
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
Produtos afetados
wolfSSL Inc. · wolfSSHCVEs relacionadas — wolfSSL Inc. wolfSSH
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