In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
netfilter: flowtable: support IPIP tunnel with direct xmit<\/p>\n
The combination of IPIP tunnel with direct xmit, eg. bridge device,
\nbreaks because no dst_entry is provided to check the skb headroom and to
\nset the iph->frag_off field. This leads to invalid dst usage and can
\ntrigger a crash in the tunnel transmit path.<\/p>\n
Fix this by moving dst_cache and dst_cookie out of the runtime union so
\nthat they can be shared by neighbour, xfrm, and direct tunnel flows.
\nFor FLOW_OFFLOAD_XMIT_DIRECT tuples carrying tunnel metadata, preserve
\nroute state in these shared fields and release it through the common
\ndst release path.<\/p>\n
Since dst_entry is now available to the three supported xmit modes and
\ndst_release() already deals with NULL dst, remove the xmit type check
\nin nft_flow_dst_release(). Moreover, skip the check if the dst entry
\nis NULL in nf_flow_dst_check() which is now the case for the direct
\nxmit case.<\/p>\n
Based on patch from Rein Wei .<\/p>\n","protected":false},"excerpt":{"rendered":"
In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
netfilter: flowtable: support IPIP tunnel with direct xmit<\/p>\n
The combination of IPIP tunnel with direct xmit, eg. bridge device,
\nbre<\/p>\n","protected":false},"template":"","meta":[],"categories":[],"tags":[],"class_list":["post-6867","vuln","type-vuln","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln\/6867","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=6867"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=6867"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=6867"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}