Vulnerability identifier: #VU7547

Vulnerability risk: Medium

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

CVE-ID: CVE-2017-2670

CWE-ID: CWE-399

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 denial of service (DoS) attack.

The vulnerability exists due to an error when closing TCP sockets in Undertow. A remote attacker can create and close multiple TCP connections, which my result in infinite loop and server crash.

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-2017-2670

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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.