CVE-2021-22884

2021-03-0300:00:00

ubuntu.com

node.js

dns rebinding

network vulnerability

cve-2021-22884

localhost6

dns server

bypassed protection

CVSS2

6.8

Attack Vector

NETWORK

Attack Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

PARTIAL

Availability Impact

PARTIAL

AV:N/AC:M/Au:N/C:P/I:P/A:P

CVSS3

8.8

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

REQUIRED

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

EPSS

0.033

Percentile

91.3%

JSON

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.

OSVersionArchitecturePackageVersionFilename
ubuntu18.04noarchnodejs< 8.10.0~dfsg-2ubuntu0.4+esm3UNKNOWN
ubuntu20.04noarchnodejs< 10.19.0~dfsg-3ubuntu1.2UNKNOWN