Vulnerability identifier: #VU9171

Vulnerability risk: Low

CVSSv3.1: 4.6 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2017-4928

CWE-ID: CWE-918

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
vCenter Server
Server applications / Virtualization software

Vendor: VMware, Inc

Description
The vulnerability allows a remote attacker to obtain potentially sensitive information on the target system.

The weakness exists due to insufficient validation of user-supplied input. A remote attacker can send specially crafted POST requests via the Flash-based vSphere Web Client to trigger a URL validation flaw and conduct server side request forgery (SSRF) and carriage return line feed (CRLF) injection attacks to gain access to arbitrary data.

Mitigation
Update to version 5.5 U3f, 6.0 U3c.

Vulnerable software versions

vCenter Server: 5.5.0 - 6.0.0

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External links
http://www.vmware.com/security/advisories/ID:%20VMSA-2017-0017.html

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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.