CVE-2021-23803 Access Control Bypass
Attackers can bypass function restrictions in the Latte template engine by injecting control characters, potentially leading to unauthorized code execution.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2021-23803?
CVE-2021-23803 is a critical vulnerability in latte/latte, published on 17 Dec 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
This affects the package latte/latte before 2.10.6. There is a way to bypass allowFunctions that will affect the security of the application. When the template is set to allow/disallow the use of certain functions, adding control characters (x00-x08) after the function will bypass these restrictions.
Weakness: CWE-863
Which versions are affected by CVE-2021-23803?
2 open source packages ship an affected version, including latte/latte. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
latte/latte Packagist | All versions | 2.10.6 |
latte/latte Packagist | All versions | 2.10.6 |
Products include Nette Latte.
How do I fix CVE-2021-23803?
Upgrade latte/latte to 2.10.6 or later.
Is CVE-2021-23803 being exploited?
There is no known exploitation of CVE-2021-23803 in the wild and no public exploit code.
Other vulnerabilities in latte/latte
Sources
Also known as GHSA-6pj2-5fqq-xvjc, SNYK-PHP-LATTELATTE-1932226, UBUNTU-CVE-2021-23803.