GHSA-pw8r-6689-xvf4
Angular Expressions - Remote Code Execution using filters
Packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| npm | angular-expressions | < 1.5.2 | 1.5.2 |
Details
As written in the advisory (Markdown source, shown as plain text).
## Impact
An attacker can write a malicious expression that escapes the sandbox to execute arbitrary code on the system.
Example of vulnerable code:
```
const expressions = require("angular-expressions");
const result = expressions.compile("a | __proto__")({}, {});
```
This should throw the error : Filter '__proto__' is not defined, however, this shows :
Uncaught SyntaxError: Unexpected identifier 'Object'
With a more complex (undisclosed) payload, one can get full access to Arbitrary code execution on the system.
## Vulnerable versions :
angular-expressions <= 1.5.1
## Patches
The problem has been patched in version 1.5.2 of angular-expressions.
## Credits
Credits go to San Gil from [www.securityoffice.io](https://securityoffice.io/) who has found the issue and reported it to us.
References
External links from the advisory. They lead to third-party sites.