In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
staging: rtl8723bs: fix missing shared-key auth challenge length check<\/p>\n
The WEP shared-key authentication handler uses the challenge-text
\nelement’s attacker-controlled length without checking it against the
\nfixed 128-byte chg_txt buffer.<\/p>\n
In OnAuthClient() the length from rtw_get_ie() – up to 255 – is used
\nto perform memcpy() into the 128-byte pmlmeinfo->chg_txt, so a
\nmalicious AP sending a malformed WLAN_EID_CHALLENGE element can
\noverflow\/underfill chg_txt by up to 127 bytes. It is reachable over the
\nair, before association, during shared-key authentication. In the case
\nof an overflow, the driver can write out of bounds. In the case of an
\nunderfill, the driver can echo stale buffer memory.<\/p>\n
The challenge text is defined to be exactly 128 octets, which is
\nalready provided as the WLAN_AUTH_CHALLENGE_LEN define; require the
\nelement to be exactly that length before use.<\/p>\n","protected":false},"excerpt":{"rendered":"
In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
staging: rtl8723bs: fix missing shared-key auth challenge length check<\/p>\n
The WEP shared-key authentication handler uses the challeng<\/p>\n","protected":false},"template":"","meta":[],"categories":[],"tags":[],"class_list":["post-11242","vuln","type-vuln","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln\/11242","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=11242"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=11242"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=11242"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}