Node.js before versions 15.10.0, 14.16.0, 12.21.0 and 10.24.0 is vulnerable to denial of service attacks when the whitelist includes “localhost6”. When “localhost6” is not present in /etc/hosts, it is just an ordinary domain that is resolved via DNS, i.e., over network. If the attacker controls the victim's DNS server or can spoof its responses, the DNS rebinding protection can be bypassed by using the “localhost6” domain. As long as the attacker uses the “localhost6” domain, they can still apply the attack described in CVE-2018-7160.
Node.js before versions 15.10.0, 14.16.0, 12.21.0 and 10.24.0 is vulnerable to denial of service attacks when the whitelist includes “localhost6”. When “localhost6” is not present in /etc/hosts, it is just an ordinary domain that is resolved via DNS, i.e., over network. If the attacker controls the victim's DNS server or can spoof its responses, the DNS rebinding protection can be bypassed by using the “localhost6” domain. As long as the attacker uses the “localhost6” domain, they can still apply the attack described in CVE-2018-7160.
https://nodejs.org/en/blog/vulnerability/february-2021-security-releases/#dns-rebinding-in-inspect-cve-2021-22884 https://hackerone.com/bugs?report_id=1069487 https://github.com/nodejs-private/node-private/pull/244 https://github.com/nodejs/node/commit/43ae9c46c35a935723a9109828c87380d781e147 https://github.com/nodejs/node/commit/1ca3f5abcbe03bc037e264291b8bec606daae30a https://github.com/nodejs/node/commit/1564752d553f582c8048ee45614f870ee2a446c9 https://github.com/nodejs/node/commit/d1cf6a9b0f74d587dea1d0f194d922ff94eddd06
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