Azure Active Directory Authentication Library Elevation of Privilege Vulnerability
CVE-2019-1258

8.8HIGH

Key Information:

Vendor

Microsoft
Status
Adal.net
Nuget 5.2.0
Vendor
CVE Published:
14 August 2019

What is CVE-2019-1258?

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.

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Affected Version(s)

ADAL.NET Unknown 5.0.0

Nuget 5.2.0 Unknown 5.0.0

References

https://portal.msrc.microsoft.com/en-US/security-guidance...
x_refsource_MISC

EPSS Score

10% chance of being exploited in the next 30 days.

CVSS V3.1

Score:
8.8
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

JSON
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