In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
nvme-tcp: fix host memory disclosure on R2T for a read command<\/p>\n
nvme_tcp_handle_r2t() does not check the direction of the request the
\nR2T refers to. A malicious controller can send an R2T for a READ and
\nthe host will answer it: nvme_tcp_setup_h2c_data_pdu() builds the
\nH2CData header and nvme_tcp_try_send_data() sends the request’s data
\nbuffer. That buffer is the READ destination, so its contents go to the
\ncontroller.<\/p>\n
The command then completes normally and nothing is logged.<\/p>\n
Against a test controller that answers every READ with an R2T, a 4096
\nbyte buffered read returned all 4096 bytes, split over two R2Ts. The
\npages contained stale kernel data, including an array of struct page
\npointers.<\/p>\n
Reject an R2T for a request that is not a write.<\/p>\n","protected":false},"excerpt":{"rendered":"
In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
nvme-tcp: fix host memory disclosure on R2T for a read command<\/p>\n
nvme_tcp_handle_r2t() does not check the direction of the request t<\/p>\n","protected":false},"template":"","meta":[],"categories":[],"tags":[],"class_list":["post-21403","vuln","type-vuln","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln\/21403","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=21403"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=21403"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=21403"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}