In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
net: tls: prevent chain-after-chain in plain text SG<\/p>\n
Sashiko points out that if end = 0 (start != 0) the current
\ncode will create a chain link to content type right after
\nthe wrap link:<\/p>\n
This would create a chain where the wrap link points directly
\n to another chain link. The scatterlist API sg_next iterator
\n does not recursively resolve consecutive chain links.<\/p>\n
meaning this is illegal input to crypto.<\/p>\n
The wrapping link is unnecessary if end = 0. end is the entry after
\nthe last one used so end = 0 means there’s nothing pushed after
\nthe wrap:<\/p>\n
end start i
\n v v v
\n [ ]…[ ][ d ][ d ][ d ][ d ][rsv for wrap]<\/p>\n
Skip the wrapping in this case.<\/p>\n
TLS 1.3 can use the “wrapping slot” for it’s chaining if end = 0.
\nThis avoids the chain-after-chain.<\/p>\n
Move the wrap chaining before marking END and chaining off content
\ntype, that feels like more logical ordering to me, but should not
\nmatter from functional perspective.<\/p>\n","protected":false},"excerpt":{"rendered":"
In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
net: tls: prevent chain-after-chain in plain text SG<\/p>\n
Sashiko points out that if end = 0 (start != 0) the current
\ncode will create <\/p>\n","protected":false},"template":"","meta":[],"categories":[],"tags":[],"class_list":["post-15035","vuln","type-vuln","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln\/15035","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=15035"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=15035"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=15035"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}