Vulnerability identifier: #VU32332

Vulnerability risk: Medium

CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2016-2216

CWE-ID: CWE-20

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Node.js
Server applications / Web servers

Vendor: Node.js Foundation

Description

The vulnerability allows a remote non-authenticated attacker to manipulate data.

The HTTP header parsing code in Node.js 0.10.x before 0.10.42, 0.11.6 through 0.11.16, 0.12.x before 0.12.10, 4.x before 4.3.0, and 5.x before 5.6.0 allows remote attackers to bypass an HTTP response-splitting protection mechanism via UTF-8 encoded Unicode characters in the HTTP header, as demonstrated by %c4%8d%c4%8a.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Node.js: 0.10.0 - 0.10.41

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External links
http://blog.safebreach.com/2016/02/09/http-response-splitting-in-node-js-root-cause-analysis/
http://info.safebreach.com/hubfs/Node-js-Response-Splitting.pdf
http://lists.fedoraproject.org/pipermail/package-announce/2016-February/177184.html
http://lists.fedoraproject.org/pipermail/package-announce/2016-February/177673.html
http://packetstormsecurity.com/files/135711/Node.js-HTTP-Response-Splitting.html
http://www.securityfocus.com/bid/83141
http://nodejs.org/en/blog/vulnerability/february-2016-security-releases/
http://security.gentoo.org/glsa/201612-43

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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.