CVE-2021-22884

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.

How to fix CVE-2021-22884

To remediate CVE-2021-22884, upgrade the affected package to a fixed version below.

• —upgrade to 12.21.0-r0 or later
• —upgrade to 10.24.0 or later
• —upgrade to 10.24.0 or later
• —upgrade to 12.21.0~dfsg-1 or later

Is CVE-2021-22884 being exploited?

Low — EPSS is 0.3%, meaning exploitation activity has not been observed at scale.

Affected packages (4)

• from 0, < 12.21.0-r0
• >= 10.0.0, < 10.24.0, >= 12.0.0, < 12.21.0, >= 14.0.0, < 14.16.0, >= 15.0.0, < 15.10.0
• >= 10.0.0, < 10.24.0, >= 12.0.0, < 12.21.0, >= 14.0.0, < 14.16.0, >= 15.0.0, < 15.10.0
• from 0, < 12.21.0~dfsg-1

CVSS scores

References (15)

• ADVISORYsecurity.alpinelinux.org/vuln/CVE-2021-22884
• ADVISORYsecurity-tracker.debian.org/tracker/CVE-2021-22884
• WEBcert-portal.siemens.com/productcert/pdf/ssa-389290.pdf
• WEBhackerone.com/reports/1069487