Vulnerability Details : CVE-2021-42306
An information disclosure vulnerability manifests when a user or an application uploads unprotected private key data as part of an authentication certificate keyCredential on an Azure AD Application or Service Principal (which is not recommended). This vulnerability allows a user or service in the tenant with application read access to read the private key data that was added to the application.
Azure AD addressed this vulnerability by preventing disclosure of any private key values added to the application.
Microsoft has identified services that could manifest this vulnerability, and steps that customers should take to be protected. Refer to the FAQ section for more information.
For more details on this issue, please refer to the MSRC Blog Entry.
Vulnerability category: Information leak
Products affected by CVE-2021-42306
- cpe:2.3:a:microsoft:azure_automation:*:*:*:*:*:*:*:*
- cpe:2.3:a:microsoft:azure_active_directory:*:*:*:*:*:*:*:*
- cpe:2.3:a:microsoft:azure_active_site_recovery:*:*:*:*:*:*:*:*
- cpe:2.3:a:microsoft:azure_migrate:*:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2021-42306
0.28%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 68 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2021-42306
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
4.0
|
MEDIUM | AV:N/AC:L/Au:S/C:P/I:N/A:N |
8.0
|
2.9
|
NIST | |
|
6.5
|
MEDIUM | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N |
2.8
|
3.6
|
NIST | |
|
8.1
|
HIGH | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N |
2.8
|
5.2
|
Microsoft Corporation |
CWE ids for CVE-2021-42306
-
The product transmits or stores authentication credentials, but it uses an insecure method that is susceptible to unauthorized interception and/or retrieval.Assigned by: nvd@nist.gov (Primary)
References for CVE-2021-42306
-
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-42306
CVE-2021-42306 - Security Update Guide - Microsoft - Azure Active Directory Information Disclosure VulnerabilityPatch;Vendor Advisory
Jump to