8.8

CVE-2019-1258: microsoft active_directory_authentication_library

CVSS: 8.8v3.0HighModified
AliasesGHSA-xc6x-cq47-9chw
Published 14-08-2019Last modified 04-08-2024
Open JSON

Vulnerability summary

CVE-2019-1258 is a high (CVSS 8.8) vulnerability in microsoft active_directory_authentication_library. EPSS estimates a 3.80% chance of exploitation in the next 30 days, higher than 89.8% of scored vulnerabilities.

Overall risk
36/100
0100
Medium · default modelHow is this calculated?
CVSS score
8.8/10
010
High · v3.0 (NVD)
EPSS score
3.80%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 14-08-2019
    PublishedVulnerability first disclosed.
  2. 04-08-2024
    Last modifiedVulnerability information updated.

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.

CVSS metrics

3 scores · 2 sources · 2 versions

EPSS trend

Probability

3.80%

Chance of exploitation in the next 30 days

Percentile

90%

Versus all other CVEs

30-day change

0.00 pp

From 3.80% on 20-09-2026

20-09-202620-10-2026
EPSS score
3.80%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

No weakness data has been published for this record.

Affected systems

Microsoft4 products
NuGet1 product
  • microsoft.identitymodel.clients.activedirectory≥ 5.0.0, < 5.2.0

2 vendors · 5 products

References

3 links