Vulnerability identifier: #VU64696

Vulnerability risk: Medium

CVSSv3.1: 6.4 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:U/RL:O/RC:C]

CVE-ID: CVE-2022-21803

CWE-ID: CWE-20

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
nconf
Universal components / Libraries / Libraries used by multiple products

Vendor: indexzero

Description

The vulnerability allows a remote attacker to modify files on the system.

The vulnerability exists due to .set() function that is responsible for setting the configuration properties is vulnerable to Prototype Pollution. A remote attacker can provide a specially crafted property, leading to prototype object pollution.

Mitigation
Install update from vendor's website.

Vulnerable software versions

nconf: 0.1.0 - 0.11.3

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External links
http://snyk.io/vuln/SNYK-JS-NCONF-2395478
http://github.com/indexzero/nconf/releases/tag/v0.11.4
http://snyk.io/vuln/SNYK-JAVA-ORGWEBJARSNPM-2632450
http://github.com/indexzero/nconf/pull/397
http://bugzilla.redhat.com/show_bug.cgi?id=2074689

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.