In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
staging: rtl8723bs: fix OOB read in rtw_action_frame_parse()<\/p>\n
rtw_action_frame_parse() takes a frame_len parameter but never
\nactually checks it before indexing into the frame body:<\/p>\n
\tconst u8 *frame_body = frame + sizeof(struct ieee80211_hdr_3addr);
\n\t…
\n\tc = frame_body[0];
\n\t…
\n\ta = frame_body[1];<\/p>\n
frame_body already points 24 bytes (sizeof(struct
\nieee80211_hdr_3addr)) into frame, so reading frame_body[0] and
\nframe_body[1] requires frame_len >= 26. A management action frame
\nshorter than that (e.g. exactly 24 bytes, the minimum a malicious
\npeer can send) causes a 1-2 byte out-of-bounds read.<\/p>\n
This is reachable from rtw_cfg80211_monitor_if_xmit_entry() and
\ncfg80211_rtw_mgmt_tx() in ioctl_cfg80211.c, both of which pass
\nattacker\/user-influenced frame buffers and lengths straight through.<\/p>\n
Add the missing length check before frame_body is dereferenced.<\/p>\n","protected":false},"excerpt":{"rendered":"
In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
staging: rtl8723bs: fix OOB read in rtw_action_frame_parse()<\/p>\n
rtw_action_frame_parse() takes a frame_len parameter but never
\nactual<\/p>\n","protected":false},"template":"","meta":[],"categories":[],"tags":[],"class_list":["post-24705","vuln","type-vuln","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln\/24705","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=24705"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=24705"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=24705"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}