Vulnerability identifier: #VU7548

Vulnerability risk: Medium

CVSSv3.1: 7.2 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:L/E:U/RL:O/RC:C]

CVE-ID: CVE-2017-2666

CWE-ID: CWE-113

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Undertow
Server applications / Web servers

Vendor: Red Hat Inc.

Description

The vulnerability allows a remote attacker to perform a phishing attack

The vulnerability exists due to an error when processing headers in HTTP requests in Undertow. A remote attacker can create a specially crafted HTTP request, split the HTTP response from server and poison the web cache. 

Successful exploitation of the vulnerability may allow an attacker to poison web cache and perform phishing or XSS attacks against website visitors.

Mitigation
Update to version 1.4.18.

Vulnerable software versions

Undertow: 1.4.0 - 1.4.17

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External links
http://access.redhat.com/security/cve/cve-2017-2666

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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.