In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
wifi: mwifiex: bound the pairwise-cipher OUI walk to the IE length<\/p>\n
mwifiex_search_oui_in_ie() reads a pairwise-cipher (PTK) count from a
\nbeacon\/probe-response RSN or WPA information element and then walks that
\nmany 4-byte OUIs, comparing each with memcmp(). The count comes straight
\nfrom the (attacker-supplied) IE and is never checked against the
\nelement’s own length, and the callers admit the element on element_id
\nalone (has_ieee_hdr() \/ has_vendor_hdr(), no length check). A crafted
\nRSN\/WPA IE with a large pairwise count therefore makes the walk read up
\nto 255 * 4 bytes past the element — an out-of-bounds read of the
\nkmemdup()’d beacon buffer, reachable from any AP whose beacon\/probe
\nresponse is processed during scan-result parsing.<\/p>\n
Pass the number of IE bytes available at the OUI list and bound the walk
\nto the element. Keep the length signed and reject a negative value
\nbefore any unsigned arithmetic, so a small or zero IE length cannot
\nunderflow to a large size_t and defeat the bound.<\/p>\n
Found by 0sec automated security-research tooling (https:\/\/0sec.ai).<\/p>\n","protected":false},"excerpt":{"rendered":"
In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
wifi: mwifiex: bound the pairwise-cipher OUI walk to the IE length<\/p>\n
mwifiex_search_oui_in_ie() reads a pairwise-cipher (PTK) count <\/p>\n","protected":false},"template":"","meta":[],"categories":[],"tags":[],"class_list":["post-33255","vuln","type-vuln","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln\/33255","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=33255"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=33255"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=33255"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}