GHSA-c3hq-7mxh-mqxf Sandbox Breakout / Arbitrary Code Execution in lighter-vm
Attackers can execute arbitrary code by bypassing the sandbox in lighter-vm via constructor access, requiring immediate replacement of the library.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is GHSA-c3hq-7mxh-mqxf?
GHSA-c3hq-7mxh-mqxf is a code injection vulnerability in lighter-vm, published on 4 Sep 2020. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
All versions of lighter-vm are vulnerable to Sandbox Escape leading to Remote Code Execution. The package fails to restrict access to the main context through this.constructor.constructor . This may allow attackers to execute arbitrary code in the system. Evaluating the payload this.constructor.constructor('return process.env')() prints the contents of process.env.
Recommendation
No fix is currently available. Consider using an alternative package until a fix is made available.
Which versions are affected by GHSA-c3hq-7mxh-mqxf?
2 open source packages ship an affected version, including lighter-vm.
| Package | Affected | Fixed in |
|---|---|---|
lighter-vm npm | From 0.0.0 | None |
lighter-vm npm | From 0.0.0 | None |
How do I fix GHSA-c3hq-7mxh-mqxf?
No fix has been published for GHSA-c3hq-7mxh-mqxf yet. Limit exposure of the affected software until one is available.
Upgrade, and never evaluate templates, expressions or code built from user input. More about Code injection.
Is GHSA-c3hq-7mxh-mqxf being exploited?
There is no known exploitation of GHSA-c3hq-7mxh-mqxf in the wild and no public exploit code.