Uncaught Exception Affecting js-sandbox package, versions >=0.0.0

js-sandbox is a Rust library for executing JavaScript code from Rust in a secure sandbox. It is based on the Deno project and uses serde_json for serialization.

Affected versions of this package are vulnerable to Uncaught Exception via the op_panic function exposed by deno_core. An attacker can cause the runtime's containing thread to panic and disrupt sandboxing by invoking this operation from the JavaScript environment.

This vulnerability can be mitigated by stubbing out the exposed op:

Deno.core.ops.op_panic = (msg) => { throw new Error(msg) };

Denial of Service (DoS) describes a family of attacks, all aimed at making a system inaccessible to its intended and legitimate users.

Unlike other vulnerabilities, DoS attacks usually do not aim at breaching security. Rather, they are focused on making websites and services unavailable to genuine users resulting in downtime.

One popular Denial of Service vulnerability is DDoS (a Distributed Denial of Service), an attack that attempts to clog network pipes to the system by generating a large volume of traffic from many machines.

When it comes to open source libraries, DoS vulnerabilities allow attackers to trigger such a crash or crippling of the service by using a flaw either in the application code or from the use of open source libraries.

Two common types of DoS vulnerabilities:

• High CPU/Memory Consumption- An attacker sending crafted requests that could cause the system to take a disproportionate amount of time to process. For example, commons-fileupload:commons-fileupload.

• Crash - An attacker sending crafted requests that could cause the system to crash. For Example, npm ws package

• GitHub Issue
• RustSec Advisory