CVE-2025-21173
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Insights vulnerability analysis
Description
An elevation of privilege vulnerability was found in .NET. This flaw allows an attacker to write a specially crafted file in the security context of the local system.
Statement
This vulnerability is rated with an Important severity because it allows an attacker to gain elevated privileges in the local system context. By exploiting this, an attacker can bypass standard user permissions, manipulate critical system files, execute arbitrary code, or install malicious software, potentially compromising the entire system.
Mitigation
Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.
Additional information
- Bugzilla 2337893: dotnet: .NET Elevation of Privilege Vulnerability
- CWE-379: Creation of Temporary File in Directory with Insecure Permissions
Common Vulnerability Scoring System (CVSS) Score Details
Important note
CVSS scores for open source components depend on vendor-specific factors (e.g. version or build chain). Therefore, Red Hat's score and impact rating can be different from NVD and other vendors. Red Hat remains the authoritative CVE Naming Authority (CNA) source for its products and services (see Red Hat classifications).
| Red Hat | NVD | |
|---|---|---|
CVSS v3 Base Score | 7.3 | N/A |
Attack Vector | Local | N/A |
Attack Complexity | Low | N/A |
Privileges Required | Low | N/A |
User Interaction | Required | N/A |
Scope | Unchanged | N/A |
Confidentiality Impact | High | N/A |
Integrity Impact | High | N/A |
Availability Impact | High | N/A |
CVSS v3 Vector
Red Hat: CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H
Understanding the Weakness (CWE)
Confidentiality
Technical Impact: Read Application Data
Since the file is visible and the application which is using the temp file could be known, the attacker has gained information about what the user is doing at that time.
Frequently Asked Questions
Why is Red Hat's CVSS v3 score or Impact different from other vendors?
My product is listed as "Under investigation" or "Affected", when will Red Hat release a fix for this vulnerability?
What can I do if my product is listed as "Will not fix"?
What can I do if my product is listed as "Fix deferred"?
What is a mitigation?
I have a Red Hat product but it is not in the above list, is it affected?
Why is my security scanner reporting my product as vulnerable to this vulnerability even though my product version is fixed or not affected?
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