In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
geneve: validate inner network offset in geneve_gro_complete()<\/p>\n
Even with both paths gated on gs->gro_hint, geneve_gro_complete()
\nre-derives the inner dispatch type and length from the packet and the
\ncurrent gs->gro_hint, independently of geneve_gro_receive(). The two can
\ndisagree if gs->gro_hint flips under a concurrent geneve_quiesce()\/
\ngeneve_unquiesce() (sk_user_data is NULL across a synchronize_net()), or if
\nthe re-read option bytes differ from the ones receive parsed.<\/p>\n
geneve_gro_receive() already records the inner network header position in
\nNAPI_GRO_CB()->inner_network_offset. Have geneve_gro_complete() compute the
\noffset it is about to dispatch at, adding ETH_HLEN in the ETH_P_TEB case
\nwhere eth_gro_complete() steps over the inner MAC header, and bail out if
\nit lands past inner_network_offset.<\/p>\n
Use a lower bound rather than exact equality: between gh_len and the inner
\nL3 header, geneve_gro_receive() may also have pulled an inner VLAN tag
\n(vlan_gro_receive() advances the recorded offset past it), which only moves
\ninner_network_offset further out. A valid frame therefore always satisfies
\ninner_nh <= inner_network_offset, while a gh_len inflated by a hint
\ngro_receive() did not honour dispatches past the validated inner header,
\ni.e. the out-of-bounds completion. Only the latter is rejected.<\/p>\n","protected":false},"excerpt":{"rendered":"
In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
geneve: validate inner network offset in geneve_gro_complete()<\/p>\n
Even with both paths gated on gs->gro_hint, geneve_gro_complete()
\nr<\/p>\n","protected":false},"template":"","meta":[],"categories":[],"tags":[],"class_list":["post-7053","vuln","type-vuln","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln\/7053","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=7053"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=7053"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=7053"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}