CVE-2025-59457
📋 TL;DR
This vulnerability in JetBrains TeamCity allows attackers to leak credentials on Windows systems due to insufficient Git URL validation. It affects TeamCity installations on Windows where Git repositories are configured. Attackers could potentially access sensitive credentials stored in the TeamCity environment.
💻 Affected Systems
- JetBrains TeamCity
📦 What is this software?
Teamcity by Jetbrains
⚠️ Risk & Real-World Impact
Worst Case
Attackers gain access to Git repository credentials, potentially compromising source code, deployment pipelines, and other integrated systems.
Likely Case
Credential theft leading to unauthorized access to version control systems and potentially lateral movement within the development environment.
If Mitigated
Limited impact with proper network segmentation and credential management, though some exposure remains possible.
🎯 Exploit Status
Exploitation requires some level of access to TeamCity interface or ability to manipulate Git repository configurations.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 2025.07.2 or later
Vendor Advisory: https://www.jetbrains.com/privacy-security/issues-fixed/
Restart Required: Yes
Instructions:
1. Backup TeamCity configuration and data. 2. Download TeamCity 2025.07.2 or later from JetBrains website. 3. Stop TeamCity service. 4. Install the updated version. 5. Restart TeamCity service. 6. Verify functionality.
🔧 Temporary Workarounds
Restrict Git URL Input
windowsImplement input validation for Git repository URLs in TeamCity configuration
Configure TeamCity to only accept Git URLs from trusted sources and validate URL format
Credential Isolation
allUse separate, limited-scope credentials for TeamCity Git operations
Create dedicated service accounts with minimal permissions for Git repository access
🧯 If You Can't Patch
- Implement strict network segmentation to isolate TeamCity servers from sensitive systems
- Rotate all Git repository credentials used by TeamCity and monitor for unauthorized access
🔍 How to Verify
Check if Vulnerable:
Check TeamCity version in administration interface or via teamcity-server.log fileCheck Version:
Check %TEAMCITY_HOME%/logs/teamcity-server.log for version information or view in web interfaceVerify Fix Applied:
Confirm TeamCity version is 2025.07.2 or later and test Git repository functionality📡 Detection & Monitoring
Log Indicators:
- Unusual Git repository URL configurations
- Failed authentication attempts to Git repositories
- Unexpected credential usage patterns
Network Indicators:
- Unusual outbound connections to Git repositories
- Traffic patterns suggesting credential harvesting
SIEM Query:
source="teamcity" AND (event="git_config_change" OR event="auth_failure")