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WS-2019-0284
Good to know:
Date: September 19, 2019
Realms-shim before 1.2.0 is vulnerable to a Sandbox Breakout. The package's core evaluator, which must switch between "unsafe mode" and "safe mode" for each call, could be left in "unsafe mode" if an attacker is able to force a RangeError in a specific timeframe. This would allow the attacker to escape the sandbox and run arbitrary code.
Language: JS
Severity Score
Severity Score
Weakness Type (CWE)
Code
CWE-17Top Fix
CVSS v3.1
| Base Score: |
|
|---|---|
| Attack Vector (AV): | NETWORK |
| Attack Complexity (AC): | HIGH |
| Privileges Required (PR): | LOW |
| User Interaction (UI): | NONE |
| Scope (S): | UNCHANGED |
| Confidentiality (C): | HIGH |
| Integrity (I): | HIGH |
| Availability (A): | HIGH |