In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
net: dsa: mv88e6xxx: bound the policy rule dump by the caller’s buffer size<\/p>\n
mv88e6xxx_get_rxnfc() uses rxnfc->rule_cnt as the write index while
\ndumping the policy IDR, clobbering the input value before it has been
\nlooked at. That input is the number of entries the caller had room for.
\nETHTOOL_GRXCLSRLALL requires no CAP_NET_ADMIN and the ioctl sizes the
\nbuffer from the rule_cnt userspace passes in, so once an admin has
\ninstalled policy rules any user can ask for fewer slots than there are
\nrules and run off the end of the allocation. A rule_cnt of 0 leaves the
\nbuffer pointer NULL and the walk dereferences it.<\/p>\n
Count into a local so the caller’s limit survives the walk, and stop with
\n-EMSGSIZE once it is reached.<\/p>\n","protected":false},"excerpt":{"rendered":"
In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
net: dsa: mv88e6xxx: bound the policy rule dump by the caller’s buffer size<\/p>\n
mv88e6xxx_get_rxnfc() uses rxnfc->rule_cnt as the writ<\/p>\n","protected":false},"template":"","meta":[],"categories":[],"tags":[],"class_list":["post-29182","vuln","type-vuln","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln\/29182","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=29182"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=29182"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=29182"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}