In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
mac802154: llsec: reject frames shorter than the authentication tag<\/p>\n
llsec_do_decrypt_auth() computes the associated-data length for the
\nAEAD request as<\/p>\n
\tassoclen += datalen – authlen;<\/p>\n
where datalen is the number of bytes after the MAC header and authlen
\n(4, 8 or 16) is the length of the authentication tag. Nothing verifies
\nthat the frame actually carries at least authlen payload bytes. A
\nsecured frame whose payload is shorter than the tag makes
\ndatalen – authlen negative; assoclen is then passed to
\naead_request_set_ad() as an unsigned value close to 4 GiB, so
\ncrypto_aead_decrypt() walks far off the end of the scatterlist that
\nonly spans the real frame.<\/p>\n
The frame is fully attacker-controlled and reaches this path from any
\nIEEE 802.15.4 peer in radio range. Reject frames whose payload is
\nshorter than the authentication tag before the subtraction.<\/p>\n
Dynamically reproduced on a KASAN kernel as a general-protection-fault
\nin the AEAD scatterwalk, and the fix confirmed.<\/p>\n","protected":false},"excerpt":{"rendered":"
In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
mac802154: llsec: reject frames shorter than the authentication tag<\/p>\n
llsec_do_decrypt_auth() computes the associated-data length fo<\/p>\n","protected":false},"template":"","meta":[],"categories":[],"tags":[],"class_list":["post-5338","vuln","type-vuln","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln\/5338","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=5338"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=5338"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=5338"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}