Multiple vulnerabilities in Active Directory Federation Services (ADFS)

Published: 2019-07-10

Risk	Medium
Patch available	YES
Number of vulnerabilities	2
CVE-ID	CVE-2019-0975 CVE-2019-1126
CWE-ID	CWE-399 CWE-799
Exploitation vector	Network
Public exploit	N/A
Vulnerable software	Windows Server Operating systems & Components / Operating system
Vendor	Microsoft

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

1) Resource management error

EUVDB-ID: #VU19111

Risk: Low

CVSSv4.0: 0.5 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2019-0975

CWE-ID: CWE-399 - Resource Management Errors

Exploit availability: No

Description

The vulnerability allows a remote attacker to bypass certain security restrictions.

The vulnerability exists due to the way Active Directory Federation Services (ADFS) performs updates for the list of banned IP addresses. A remote attacker can convince the ADFS administrator to update a list of banned IP addresses and bypass security restrictions

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Windows Server: 2016 10.0.14393.10 - 2019 1903

CPE2.3

External links

https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2019-0975

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.

2) Improper control of interaction frequency

EUVDB-ID: #VU19112

Risk: Medium

CVSSv4.0: 2.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2019-1126

CWE-ID: CWE-799 - Improper Control of Interaction Frequency