CVE-2019-1006 Auth bypass in Microsoft .NET Framework 2.0

What is CVE-2019-1006?

CVE-2019-1006 is a high-severity authentication bypass vulnerability in Microsoft .Net Framework, published on 15 Jul 2019. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

An authentication bypass vulnerability exists in Windows Communication Foundation (WCF) and Windows Identity Foundation (WIF), allowing signing of SAML tokens with arbitrary symmetric keys, aka 'WCF/WIF SAML Token Authentication Bypass Vulnerability'.

Weakness: CWE-295

Which versions are affected by CVE-2019-1006?

It affects 13 products.

Products include Microsoft .Net Framework, Microsoft Identitymodel, Microsoft Sharepoint Enterprise Server, Microsoft Sharepoint Foundation, Microsoft Sharepoint Server, Microsoft Windows 10 and 7 more.

How do I fix CVE-2019-1006?

No fix has been published for CVE-2019-1006 yet. Limit exposure of the affected software until one is available.

Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.

Is CVE-2019-1006 being exploited?

There is no known exploitation of CVE-2019-1006 in the wild and no public exploit code.

Public exploit code: 1 proofs of concept on GitHub.

Other vulnerabilities in Microsoft .Net Framework

• CVE-2020-0646 Microsoft .NET Framework Remote Code Execution Exploited Critical 9.8
• CVE-2017-8759 Microsoft .NET Framework Remote Code Execution Exploited High 7.8
• CVE-2015-1671 Microsoft Windows Remote Code Execution Exploited High 7.8
• CVE-2024-29059 Microsoft .NET Framework Information Disclosure Exploited High 7.5
• CVE-2014-4073 Privilege escalation in n/a Critical 10.0

All Microsoft .Net Framework vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-42m9-f9c6-jjrj.