CVE-2019-0975 Security feature bypass in Windows Server

Medium 6.3 Published 15 Jul 2019 Updated 4 Aug 2024

An attacker can bypass ADFS IP banning features by tricking an administrator into updating the banned IP list, requiring a security patch.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: A user has to click or open something
Fix: None listed

What is CVE-2019-0975?

CVE-2019-0975 is a medium-severity vulnerability in Microsoft Windows Server 2016, published on 15 Jul 2019. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

Official description

A security feature bypass vulnerability exists when Active Directory Federation Services (ADFS) improperly updates its list of banned IP addresses. To exploit this vulnerability, an attacker would have to convince a victim ADFS administrator to update the list of banned IP addresses. This security update corrects how ADFS updates its list of banned IP addresses., aka 'ADFS Security Feature Bypass Vulnerability'. This CVE ID is unique from CVE-2019-1126.

Which versions are affected by CVE-2019-0975?

It affects 2 products.

Products include Microsoft Windows Server 2016, Microsoft Windows Server 2019.

How do I fix CVE-2019-0975?

No fix has been published for CVE-2019-0975 yet. Limit exposure of the affected software until one is available.

Is CVE-2019-0975 being exploited?

There is no known exploitation of CVE-2019-0975 in the wild and no public exploit code.

All Microsoft Windows Server 2016 vulnerabilities

Sources

Also known as GHSA-xppj-j5qj-xhcx.