Executive Summary
CVE-2025-33206 is a high-severity command injection vulnerability affecting NVIDIA Nsight Graphics on Linux platforms. The issue arises from improper handling of user-supplied input that is later incorporated into system-level command execution. Under certain conditions, an attacker can inject additional shell commands that the operating system executes unintentionally.
This flaw allows arbitrary command execution, potentially leading to privilege escalation, data compromise, and denial of service. While exploitation requires local access and user interaction, the impact can be significant, particularly on developer workstations or shared build systems where Nsight Graphics is commonly used.
Vulnerability Details
- CVE ID: CVE-2025-33206
- Product: NVIDIA Nsight Graphics
- Affected Platform: Linux
- Severity: High
- CVSS v3.1 Score: 7.8
- Attack Vector: Local
- Privileges Required: None initially
- User Interaction: Required
- Scope: Unchanged
- Impact:
- Confidentiality: High
- Integrity: High
- Availability: High
Root Cause
The vulnerability exists due to unsafe construction of operating system commands within Nsight Graphics. Certain user-controlled inputs are passed to shell execution routines without proper sanitization or escaping. As a result, shell metacharacters embedded in the input are interpreted by the shell as additional commands rather than plain data.
This is a classic case of OS Command Injection (CWE-78), where the application assumes input is safe and allows the operating system shell to interpret it directly.
How Exploitation Works
To exploit this vulnerability, an attacker must already have local access to the Linux system and must be able to influence user interaction with Nsight Graphics. Typical exploitation paths include:
- Tricking a user into opening a specially crafted project, capture, or configuration file
- Leveraging malicious parameters passed through Nsight-related scripts or utilities
- Causing Nsight to process unexpected input during normal GUI or command-line operations
Once the vulnerable code path is triggered, injected shell characters allow the attacker to append arbitrary commands. These commands execute with the same privileges as the user running Nsight Graphics.
Impact and Risk
If successfully exploited, this vulnerability may allow an attacker to:
- Execute arbitrary OS commands
- Modify or delete files
- Exfiltrate source code or credentials
- Install backdoors or persistence mechanisms
- Crash Nsight or destabilize the system
- Chain with local privilege escalation vulnerabilities
Developer machines are particularly attractive targets, as they often contain proprietary source code, signing keys, build credentials, and access to internal infrastructure.
Exploit and PoC Availability
At the time of writing:
- No publicly released, weaponized proof-of-concept exploit is available
- No known active exploitation campaigns have been reported
- The vulnerability is considered technically straightforward to exploit once the vulnerable input path is understood
The absence of public exploits does not reduce the risk, especially in environments where attackers may already have limited access.
MITRE Mapping
- CWE:
- CWE-78 – Improper Neutralization of Special Elements used in an OS Command
- MITRE ATT&CK Techniques (Likely):
- T1059 – Command and Scripting Interpreter
- T1204 – User Execution
- T1105 – Ingress Tool Transfer (post-exploitation)
- T1070 – Indicator Removal (post-exploitation)
Detection Strategy Overview
Because this vulnerability results in unexpected command execution, detection should focus on behavioral anomalies, not signatures alone.
The strongest indicators involve:
- Nsight spawning shell interpreters
- Unusual command-line arguments
- Child processes inconsistent with normal Nsight behavior
- File or network activity immediately following Nsight execution
EDR Detection Rules (Behavior-Based)
Rule 1: Nsight Spawning a Shell Interpreter
Purpose:
Detects abnormal behavior where Nsight launches a shell, which is not expected during normal use.
Logic:
IF parent_process_name CONTAINS ("nsight" OR "NsightGraphics" OR "ngfx")
AND child_process_name IN ("/bin/sh", "/bin/bash", "dash", "zsh")
THEN alert "Possible command injection via Nsight Graphics"
Severity: High
False Positives: Rare
Rule 2: Nsight Executing Shell With Suspicious Arguments
Purpose:
Detects command injection via shell metacharacters.
Indicators:; && || | $( `
Logic:
IF parent_process_name CONTAINS "nsight"
AND child_process_name CONTAINS ("sh" OR "bash")
AND command_line CONTAINS (";" OR "&&" OR "|" OR "$(" OR "`")
THEN alert "Nsight command injection attempt detected"
Severity: Critical
Rule 3: Unexpected Interpreter or Tool Execution
Purpose:
Detects post-exploitation activity.
Monitored Child Processes:
- python
- perl
- ruby
- nc
- curl
- wget
- socat
Logic:
IF parent_process_name CONTAINS "nsight"
AND child_process_name IN ("python","perl","ruby","nc","curl","wget")
THEN alert "Post-exploitation activity via Nsight Graphics"
SIEM Detection Rules
Rule 4: Linux auditd – Nsight Command Execution
Audit Configuration:
-a always,exit -F arch=b64 -S execve -F exe=/usr/bin/nsight -k nsight_exec
-a always,exit -F arch=b64 -S execve -F exe=/usr/bin/ngfx-capture -k nsight_exec
What to Investigate:
- execve events
- Arguments containing shell metacharacters
- Shell invocation from Nsight binaries
Rule 5: SIEM Query – Suspicious Nsight Command Lines
Generic Query:
process_parent_name CONTAINS "nsight"
AND process_name IN ("sh","bash")
AND process_command_line MATCHES (";|&&|\|\||\$\(|`")
Alert Severity: High
Rule 6: SIEM Correlation – Execution Followed by Network Activity
Purpose:
Detects exploitation followed by command-and-control or exfiltration.
Correlation Logic:
- Nsight spawns shell or interpreter
- Outbound network connection within 5 minutes
IF process_parent_name CONTAINS "nsight"
AND process_name IN ("sh","bash","python","nc","curl")
FOLLOWED BY outbound_network_connection WITHIN 5 minutes
THEN alert "Possible Nsight exploitation with follow-on activity"
Safe Test Payloads (Educational Use Only)
Use only in controlled environments to validate detection:
; echo NSIGHT_TEST
&& echo NSIGHT_TEST
$(echo NSIGHT_TEST)
These are non-destructive and help confirm monitoring effectiveness.
Required Log Sources
To detect this vulnerability reliably, ensure collection of:
- Process creation events
- Full command-line arguments
- auditd execve logs
- User and privilege context
- File creation/modification logs
- Network connection telemetry
Incident Response Guidance
If detection triggers:
- Isolate the affected host
- Capture process trees and command lines
- Review recent Nsight activity
- Search for dropped files or scripts
- Inspect outbound connections
- Rotate credentials if necessary
- Apply patch immediately
Mitigation and Hardening
Until patched:
- Do not run Nsight as root
- Restrict Nsight usage to trusted users
- Enable process monitoring and auditing
- Alert on GUI tools spawning shells
- Isolate developer systems where possible
Official Patch / Upgrade (Only External Link)
Upgrade NVIDIA Nsight Graphics on Linux to version 2025.5 or later using the official NVIDIA download page:
https://developer.nvidia.com/nsight-graphics/get-started
Final Takeaway
CVE-2025-33206 is a high-impact vulnerability in a trusted developer tool. While exploitation requires local access and user interaction, the consequences can be severe in real-world environments. Immediate patching combined with behavioral detection provides the strongest defense.
