In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
Squashfs: check block offset is not negative<\/p>\n
If a negative offset is read off disk (for example the offset into the
\ndecompressed fragment block), this will cause squashfs_copy_data() to
\nperform an out of bounds access.<\/p>\n
Fix by checking if offset is negative, and returning 0. This matches
\nexisting behaviour where an offset beyond the block returns 0 bytes
\ncopied.<\/p>\n
To trigger this out of bounds access requires a crafted Squashfs
\nfilesystem and CAP_SYS_ADMIN to mount it. Unprivileged users will not be
\nable to mount such a filesystem, but once mounted, an unprivileged user
\ncan trigger the out of bounds access by reading the crafted file with the
\nnegative offset.<\/p>\n","protected":false},"excerpt":{"rendered":"
In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
Squashfs: check block offset is not negative<\/p>\n
If a negative offset is read off disk (for example the offset into the
\ndecompressed f<\/p>\n","protected":false},"template":"","meta":[],"categories":[],"tags":[],"class_list":["post-25612","vuln","type-vuln","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln\/25612","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=25612"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=25612"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=25612"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}