In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
net: usb: catc: bound the RX packet length in catc_rx_done()<\/p>\n
catc_rx_done() walks a multi-packet URB, reading a two-byte length from
\neach packet header. Its bound, pkt_len > urb->actual_length, ignores the
\nheader offset and compares against the whole transfer rather than the
\nbytes left from pkt_start, so a crafted packet header makes
\nskb_copy_to_linear_data() read past the buffer.<\/p>\n
A length below ETH_HLEN is also accepted, including zero, and
\neth_type_trans() then reads a MAC header from the uninitialised tailroom
\nof a shorter skb. The is_f5u011 branch takes its length straight from
\nthe transfer, so a zero-length URB reaches the same path.<\/p>\n
Track the bytes remaining from the current packet, and reject a header
\nthat does not fit, a length past what is left, and a length below an
\nEthernet header.<\/p>\n
A transfer shorter than an Ethernet header, including a zero-length one,
\npreviously became a runt skb passed to netif_rx() and counted as
\nreceived; it is now counted in rx_length_errors and ends the walk.<\/p>\n","protected":false},"excerpt":{"rendered":"
In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
net: usb: catc: bound the RX packet length in catc_rx_done()<\/p>\n
catc_rx_done() walks a multi-packet URB, reading a two-byte length fr<\/p>\n","protected":false},"template":"","meta":[],"categories":[],"tags":[],"class_list":["post-41084","vuln","type-vuln","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln\/41084","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=41084"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=41084"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=41084"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}