CVE-2019-1258
High
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.
SeverityHigh
CVSS8.8
Exploit probability—
Product
Microsoft Active Directory Authentication Library
PublishedAug 14, 2019
First seenAug 14, 2019
How to fix
Update
- microsoft active_directory_authentication_library5.2.0 or later
- microsoft.identitymodel.clients.activedirectory5.2.0 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| microsoft active_directory_authentication_library | 5.0.5 ≤ v < 5.2.0, 5.0.0, 5.0.1, 5.0.2, 5.0.3 | 5.2.0 |
| microsoft nuget | 5.2.0 | — |
| microsoft.identitymodel.clients.activedirectoryNuGet | 5.0.0 ≤ v < 5.2.0 | 5.2.0 |
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