CVE-2019-1258
8.8 · HIGHOverview
CVE-2019-1258 is a high-severity vulnerability affecting microsoft active_directory_authentication_library. It was published on August 14, 2019 and has a CVSS 3.0 base score of 8.8 (HIGH).
This vulnerability has a CVSS 3.0 base score of 8.8, rated HIGH. It can be exploited remotely over the network. Some level of privileges is required for exploitation.
Technical Description
An elevation of privilege vulnerability exists in Azure Active Directory Authentication Library On-Behalf-Of flow, in the way the library caches tokens. This vulnerability allows an authenticated attacker to perform actions in context of another user.
The authenticated attacker can exploit this vulneraiblity by accessing a service configured for On-Behalf-Of flow that assigns incorrect tokens.
This security update addresses the vulnerability by removing fallback cache look-up for On-Behalf-Of scenarios.
Remediation
Check the references section for vendor advisories and patches from microsoft. Update active_directory_authentication_library to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
Affected Products
| Vendor | Product | Versions | Status |
|---|---|---|---|
| microsoft | active_directory_authentication_library | >= 5.0.5, < 5.2.0 | Affected |
Frequently Asked Questions
What is CVE-2019-1258?
CVE-2019-1258 is a high-severity vulnerability affecting microsoft active_directory_authentication_library. It was published on August 14, 2019 and has a CVSS 3.0 base score of 8.8 (HIGH).
How severe is CVE-2019-1258?
This vulnerability has a CVSS 3.0 base score of 8.8, rated HIGH. It can be exploited remotely over the network. Some level of privileges is required for exploitation.
How do I fix or remediate CVE-2019-1258?
Check the references section for vendor advisories and patches from microsoft. Update active_directory_authentication_library to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
How can CyberStrike help with CVE-2019-1258?
CyberStrike's AI-powered security agents can automatically detect CVE-2019-1258 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.
How CyberStrike Helps
AI agents map your attack surface to find vulnerabilities like this one.
Automated penetration testing that runs continuously, not just quarterly.
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Browser-based exploitation validates findings with real proof-of-concept.
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