Microsoft Active Directory Federation Services Information Disclosure Vulnerability

1) Information disclosure

EUVDB-ID: #VU5957

Risk: Low

CVSSv4.0: 1.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2017-0043

CWE-ID: CWE-200 - Exposure of sensitive information to an unauthorized actor

Exploit availability: No

Description

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

The vulnerability exists due to a flaw in Windows Active Directory Federation Services (ADFS) when handling XML External Entities. A remote authenticated attacker can send a specially crafted request to the ADFS service and gain access to important data.

Successful exploitation of this vulnerability results in information disclosure.

Mitigation

Install updates from Microsoft website.

Vulnerable software versions

Windows Server: 2008 - 2016 10.0.14393.10

CPE2.3

• cpe:2.3:o:microsoft:windows_server:*:*:*:*:*:*:*:*
• cpe:2.3:o:microsoft:windows_server:2008_R2:*:*:*:*:*:*:*
• cpe:2.3:o:microsoft:windows_server:2012_R2:*:*:*:*:*:*:*
• cpe:2.3:o:microsoft:windows_server:2016:10.0.14393.10:*:*:*:*:*:*

External links

https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2017-0043

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.