CVE-2019-25622 Overview
CVE-2019-25622 is a denial of service vulnerability affecting Pixarra Paint Studio version 2.17. The vulnerability allows local attackers to crash the application by providing malformed input through the key entry mechanism. By creating a text file containing a large buffer of characters and triggering the application to read it, attackers can cause Paint Studio to crash and become unavailable to legitimate users.
Critical Impact
Local attackers can render Paint Studio completely unavailable by exploiting improper input validation, causing application crashes that disrupt user workflows and require manual application restart.
Affected Products
- Pixarra Paint Studio version 2.17
Discovery Timeline
- 2026-03-23 - CVE-2019-25622 published to NVD
- 2026-03-24 - Last updated in NVD database
Technical Details for CVE-2019-25622
Vulnerability Analysis
This vulnerability stems from improper validation of input buffer sizes within Paint Studio's key entry handling mechanism. When the application processes input from external files, it fails to properly validate the length of character data before allocating memory or processing the content. This lack of bounds checking allows an attacker to craft a malicious text file with an excessively large character buffer that overwhelms the application's memory handling capabilities.
The local attack vector requires an attacker to have access to the system where Paint Studio is installed. The vulnerability requires no privileges and no user interaction to exploit once the malicious input file is positioned for the application to read. While this vulnerability does not compromise confidentiality or integrity, it has a high impact on availability, as successful exploitation renders the application completely non-functional until restarted.
Root Cause
The root cause of CVE-2019-25622 is classified under CWE-1285 (Improper Validation of Specified Index, Position, or Offset in Input). Paint Studio 2.17 lacks adequate validation of input buffer boundaries when processing key entry data from external sources. The application does not implement proper size checks before attempting to process character data, allowing oversized inputs to trigger resource exhaustion or memory corruption leading to application termination.
Attack Vector
The attack vector for this vulnerability is local, meaning an attacker must have access to the target system to exploit it. The exploitation process involves creating a specially crafted text file containing an excessively large character buffer and positioning it where Paint Studio will read it through its key entry mechanism. When the application attempts to process this malformed input, the lack of proper bounds checking causes the application to crash.
Technical details regarding the exploitation methodology can be found in the Exploit-DB #46126 entry and the VulnCheck Advisory for Paint Studio.
Detection Methods for CVE-2019-25622
Indicators of Compromise
- Unexpected Paint Studio application crashes, particularly when processing text files or handling key entries
- Presence of unusually large text files in directories accessible by Paint Studio
- Repeated application termination events logged in Windows Event Viewer
- Abnormal memory usage patterns followed by application crashes
Detection Strategies
- Monitor for repeated crashes of the Paint Studio process using endpoint detection and response (EDR) solutions
- Implement file integrity monitoring to detect creation of abnormally large text files in application directories
- Configure application crash logging and alerting through Windows Error Reporting or SentinelOne endpoint agents
- Deploy behavioral analysis rules that flag repeated application restarts within short time frames
Monitoring Recommendations
- Enable detailed application event logging for Paint Studio to capture crash events
- Configure SentinelOne agents to alert on repeated application terminations that may indicate exploitation attempts
- Monitor system resource utilization (memory and CPU) for anomalies associated with input processing
- Review endpoint telemetry for patterns consistent with local denial of service attacks
How to Mitigate CVE-2019-25622
Immediate Actions Required
- Restrict local access to systems running Paint Studio 2.17 to trusted users only
- Monitor for and remove any suspicious large text files that could be used for exploitation
- Consider temporarily limiting Paint Studio's ability to read from untrusted file sources
- Evaluate upgrading to a newer version of Paint Studio if one is available from Pixarra
Patch Information
No official vendor patch information is currently available for CVE-2019-25622. Users should check the Pixarra Official Website for any updated versions of Paint Studio that may address this vulnerability. Until a patch is available, organizations should implement the workarounds and mitigations described below to reduce risk.
Workarounds
- Limit file system access permissions for the Paint Studio application to prevent reading from untrusted directories
- Implement application whitelisting to control what files Paint Studio can access
- Deploy endpoint protection solutions that can detect and prevent denial of service attempts
- Restrict local user access to only authorized personnel who require Paint Studio for legitimate purposes
- Consider running Paint Studio in a sandboxed environment to contain potential crash impacts
# Example: Restrict directory permissions for Paint Studio (Windows PowerShell)
# Limit read access to trusted directories only
icacls "C:\Program Files\Pixarra\Paint Studio" /inheritance:r /grant:r "BUILTIN\Users:(RX)"
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
