vm2 through 3.11.6 contains a builtin-module denylist bypass in NodeVM. When the embedder uses the builtin wildcard together with negative entries (e.g. require: { builtin: [‘*’, ‘-fs’, ‘-child_process’] }), negative entries are matched by exact module name in lib\/builtin.js, so -fs removes only the builtin named fs and does not remove builtin subpaths such as fs\/promises. Sandboxed code can therefore call require(‘fs\/promises’) or require(‘node:fs\/promises’) and reach the promise-based filesystem API despite fs being denied; node: prefix handling is likewise inconsistent (a -node:fs\/promises entry does not block require(‘fs\/promises’)). Host file creation and writing were confirmed via fsp.writeFile(), and other fs\/promises operations (cp, mkdir, rename, rm, rmdir, truncate, read operations, etc.) are also reachable. This issue is fixed in vm2 3.11.7.<\/p>\n","protected":false},"excerpt":{"rendered":"
vm2 through 3.11.6 contains a builtin-module denylist bypass in NodeVM. When the embedder uses the builtin wildcard together with negative entries (e.g. require: { builtin: [‘*’, ‘-fs’, ‘-child_proces<\/p>\n","protected":false},"template":"","meta":[],"categories":[],"tags":[],"class_list":["post-25378","vuln","type-vuln","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln\/25378","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=25378"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=25378"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=25378"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}