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.
Metrics
CVSS 3.0 8.8/10
CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HAffected software
| Vendor | Product | Versions |
|---|---|---|
| Microsoft | ADAL.NET | >= 5.0.0, < publication |
| Microsoft | Nuget 5.2.0 | >= 5.0.0, < publication |
References
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2019-1258Patch, Vendor Advisory
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2019-1258Patch, Vendor Advisory
Timeline
- Published
- Aug 14, 2019
- Last modified
- Jun 17, 2026
- NVD status
- Modified