In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
xfrm6: fix out-of-bounds write in xfrm6_input_addr() when secpath is full<\/p>\n
The depth check in xfrm6_input_addr() is off by one:<\/p>\n
if (1 + sp->len == XFRM_MAX_DEPTH)
\n goto drop;
\n …
\n sp->xvec[sp->len++] = x;<\/p>\n
xfrm_input() can leave sp->len == XFRM_MAX_DEPTH, and the transport-mode
\nreceive path re-enters IPv6 input via xfrm_trans_reinject() with that
\nsecpath preserved. If the inner packet carries a destination-options HAO
\noption or a type-2 routing header, xfrm6_input_addr() is called with
\nsp->len == XFRM_MAX_DEPTH; the check (1 + 6 == 6) is false, so
\nsp->xvec[sp->len++] writes one slot past the 6-element xvec[]. The write
\nstays within the sec_path allocation (invisible to KASAN); UBSAN_BOUNDS
\nflags it and panics under panic_on_warn.<\/p>\n
Use “sp->len >= XFRM_MAX_DEPTH”, matching xfrm_input(). This also
\nrestores one chain level the old check rejected at sp->len == 5.<\/p>\n
UBSAN: array-index-out-of-bounds in net\/ipv6\/xfrm6_input.c:309:10
\n index 6 is out of range for type ‘xfrm_state *[6]’<\/p>\n","protected":false},"excerpt":{"rendered":"
In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
xfrm6: fix out-of-bounds write in xfrm6_input_addr() when secpath is full<\/p>\n
The depth check in xfrm6_input_addr() is off by one:<\/p>\n","protected":false},"template":"","meta":[],"categories":[],"tags":[],"class_list":["post-24440","vuln","type-vuln","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln\/24440","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=24440"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=24440"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=24440"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}