CVE-2021-23543 Sandbox Bypass
Attackers can bypass sandbox restrictions and execute arbitrary code via prototype pollution in the realms-shim 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 CVE-2021-23543?
CVE-2021-23543 is a critical code injection vulnerability in realms-shim, published on 7 Jan 2022. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
All versions of package realms-shim are vulnerable to Sandbox Bypass via a Prototype Pollution attack vector.
Weakness: CWE-1321
Which versions are affected by CVE-2021-23543?
2 open source packages ship an affected version, including realms-shim. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
realms-shim npm | All versions to 1.2.2 | None |
realms-shim npm | All versions to 1.2.2 | None |
Products include Agoric Realms-Shim.
How do I fix CVE-2021-23543?
No fix has been published for CVE-2021-23543 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 CVE-2021-23543 being exploited?
There is no known exploitation of CVE-2021-23543 in the wild and no public exploit code.
Other vulnerabilities in realms-shim
Sources
Also known as GHSA-q4j7-v27r-fgcx.