CVE-2025-12779: CWE-497 Access of Sensitive System Information to an Unauthorized Control Sphere in Amazon Amazon WorkSpaces
Bulletin ID: AWS-2025-025 Scope: AWS Content Type: Important (requires attention) Publication Date: 2025/11/5 13:20 PM PDT Description: We identified CVE-2025-12779, which describes an issue in the Amazon WorkSpaces client for Linux . Improper handling of the authentication token in the Amazon WorkSpaces client for Linux, versions 2023.0 through 2024.8, may expose the authentication token for DCV-based WorkSpaces to other local users on the same client machine. Under certain circumstances, an unintended user may be able to extract a valid authentication token from the client machine and access another user’s WorkSpace. We have proactively communicated with customers regarding the end of support for the impacted client versions. Impacted versions: Amazon WorkSpaces client for Linux versions 2023.0 through 2024.8
AI Analysis
Technical Summary
This vulnerability (CVE-2025-12779) involves improper handling of authentication tokens in the Amazon WorkSpaces client for Linux (versions 2023.0 to 2024.8). A local attacker with access to the client machine can extract another user's authentication token, enabling unauthorized access to that user's WorkSpace. The flaw specifically affects DCV-based WorkSpaces. The vulnerability has a CVSS 4.0 base score of 8.8, indicating high severity. Amazon addressed the issue in the 2025.0 release of the WorkSpaces client for Linux.
Potential Impact
An attacker with local access to a vulnerable Linux client can gain unauthorized access to another user's Amazon WorkSpace by extracting authentication tokens. This compromises the confidentiality and integrity of the affected WorkSpace sessions. The impact is limited to local privilege scenarios and DCV-based WorkSpaces only.
Mitigation Recommendations
Amazon has released version 2025.0 of the Amazon WorkSpaces client for Linux which addresses this vulnerability. Users should upgrade to this version or later to remediate the issue. Since this is not a cloud service vulnerability, remediation depends on client-side patching. No other mitigation steps are indicated by the vendor.
CVE-2025-12779: CWE-497 Access of Sensitive System Information to an Unauthorized Control Sphere in Amazon Amazon WorkSpaces
Description
Bulletin ID: AWS-2025-025 Scope: AWS Content Type: Important (requires attention) Publication Date: 2025/11/5 13:20 PM PDT Description: We identified CVE-2025-12779, which describes an issue in the Amazon WorkSpaces client for Linux . Improper handling of the authentication token in the Amazon WorkSpaces client for Linux, versions 2023.0 through 2024.8, may expose the authentication token for DCV-based WorkSpaces to other local users on the same client machine. Under certain circumstances, an unintended user may be able to extract a valid authentication token from the client machine and access another user’s WorkSpace. We have proactively communicated with customers regarding the end of support for the impacted client versions. Impacted versions: Amazon WorkSpaces client for Linux versions 2023.0 through 2024.8
CVSS v4.0
Score 8.8high
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CVE-2025-12779) involves improper handling of authentication tokens in the Amazon WorkSpaces client for Linux (versions 2023.0 to 2024.8). A local attacker with access to the client machine can extract another user's authentication token, enabling unauthorized access to that user's WorkSpace. The flaw specifically affects DCV-based WorkSpaces. The vulnerability has a CVSS 4.0 base score of 8.8, indicating high severity. Amazon addressed the issue in the 2025.0 release of the WorkSpaces client for Linux.
Potential Impact
An attacker with local access to a vulnerable Linux client can gain unauthorized access to another user's Amazon WorkSpace by extracting authentication tokens. This compromises the confidentiality and integrity of the affected WorkSpace sessions. The impact is limited to local privilege scenarios and DCV-based WorkSpaces only.
Mitigation Recommendations
Amazon has released version 2025.0 of the Amazon WorkSpaces client for Linux which addresses this vulnerability. Users should upgrade to this version or later to remediate the issue. Since this is not a cloud service vulnerability, remediation depends on client-side patching. No other mitigation steps are indicated by the vendor.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- AMZN
- Date Reserved
- 2025-11-05T20:58:46.275Z
- Cvss Version
- 4.0
- State
- PUBLISHED
Threat ID: 690bc2956ab8174a0d403370
Added to database: 11/05/2025, 21:33:09 UTC
Last enriched: 06/05/2026, 19:29:28 UTC
Last updated: 08/19/2026, 22:52:06 UTC
Views: 372
Community Reviews
0 reviewsCrowdsource mitigation strategies, share intel context, and vote on the most helpful responses. Sign in to add your voice and help keep defenders ahead.
Want to contribute mitigation steps or threat intel context? Sign in or create an account to join the community discussion.
Actions
Updates to AI analysis require Pro Console access. Upgrade inside Console → Billing.
Need more coverage?
Upgrade to Pro Console for AI refresh and higher limits.
For incident response and remediation, OffSeq services can help resolve threats faster.
Latest Threats
Check if your credentials are on the dark web
Instant breach scanning across billions of leaked records. Free tier available.