In wolfSSH through 1.5.0 built with\u00a0–enable-fwd,\u00a0DoChannelOpen()\u00a0in\u00a0src\/internal.c\u00a0gates only\u00a0direct-tcpip\u00a0channel opens with the forwarding policy callback.\u00a0forwarded-tcpip\u00a0opens 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\u00a0forwarded-tcpip\u00a0open against the forwards it registered with a\u00a0tcpip-forward\u00a0request, 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.<\/p>\n","protected":false},"excerpt":{"rendered":"
In wolfSSH through 1.5.0 built with\u00a0–enable-fwd,\u00a0DoChannelOpen()\u00a0in\u00a0src\/internal.c\u00a0gates only\u00a0direct-tcpip\u00a0channel opens with the forwarding policy callback.\u00a0forwarded-tcpip\u00a0opens are admitted withou<\/p>\n","protected":false},"template":"","meta":[],"categories":[],"tags":[],"class_list":["post-34075","vuln","type-vuln","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln\/34075","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln"}],"about":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/types\/vuln"}],"wp:attachment":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=34075"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=34075"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=34075"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}