vulnerability
Alpine Linux: CVE-2021-22884: Reliance on Reverse DNS Resolution for a Security-Critical Action
| Severity | CVSS | Published | Added | Modified |
|---|---|---|---|---|
| 5 | (AV:N/AC:H/Au:N/C:P/I:P/A:P) | Mar 3, 2021 | Mar 26, 2024 | Mar 25, 2026 |
Severity
5
CVSS
(AV:N/AC:H/Au:N/C:P/I:P/A:P)
Published
Mar 3, 2021
Added
Mar 26, 2024
Modified
Mar 25, 2026
Description
Node.js before 10.24.0, 12.21.0, 14.16.0, and 15.10.0 is vulnerable to DNS rebinding attacks as 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.
Solutions
alpine-linux-upgrade-nodejsalpine-linux-upgrade-nodejs-current
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