#VU21761 Information disclosure in CLI - CVE-2016-3956

Vulnerability identifier: #VU21761

Vulnerability risk: Medium

CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2016-3956

CWE-ID: CWE-200

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
CLI
Web applications / Modules and components for CMS

Vendor: npm Inc.

Description

The vulnerability allows a remote attacker to gain access to potentially sensitive information.

The vulnerability exists due to the affected software includes bearer tokens with arbitrary requests, which allows remote HTTP servers to obtain sensitive information by reading Authorization headers. A remote attacker can gain unauthorized access to sensitive information on the system.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

CLI: 0.0.1 - 3.8.2

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External links
https://github.com/npm/npm/issues/8380
https://github.com/npm/npm/commit/fea8cc92cee02c720b58f95f14d315507ccad401
https://github.com/npm/npm/commit/f67ecad59e99a03e5aad8e93cd1a086ae087cb29
https://blog.npmjs.org/post/142036323955/fixing-a-bearer-token-vulnerability

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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.