In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
batman-adv: bla: fix freeing of claims on meshif deletion<\/p>\n
When the mesh interface is getting deleted, then
\nbatadv_bla_del_backbone_claims() (via batadv_bla_purge_backbone_gw()) could
\nmake sure that all claims gets removed. But this function is only executed
\nwhen bat_priv->bla.claim_hash is not NULL. And since batadv_bla_free() is
\nalways setting it to NULL before it is (indirectly) called, it was never
\nactually executed.<\/p>\n
But the batadv_bla_purge_claims() -> batadv_handle_unclaim() is at the
\nmoment too fragile because the BLA code is not handling the rehashing in
\nbatadv_bla_update_orig_address(). The stored backbone address doesn’t have
\nto be the one actually used for the hash bucket selection during the
\ninitial adding of the backbone. The batadv_handle_unclaim() can therefore
\nfail to find the respective backbone for the unclaim and then stop the
\ndeletion.<\/p>\n
But the actual backbone_gw object is not needed for the unclaim because all
\nrelevant information is always provided by the caller. And the check for
\nthe existence of the backbone_gw doesn’t provide any additional security
\ncheck for the deletion of a claim.<\/p>\n","protected":false},"excerpt":{"rendered":"
In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
batman-adv: bla: fix freeing of claims on meshif deletion<\/p>\n
When the mesh interface is getting deleted, then
\nbatadv_bla_del_backbone<\/p>\n","protected":false},"template":"","meta":[],"categories":[],"tags":[],"class_list":["post-24635","vuln","type-vuln","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln\/24635","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=24635"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=24635"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=24635"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}