CVE-2022-29221 PHP Code Injection by malicious block or filename in Smarty
Malicious template authors can inject PHP code via block or include names in Smarty, leading to remote code execution.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2022-29221?
CVE-2022-29221 is a high-severity code injection vulnerability in Debian Debian Linux, published on 24 May 2022. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
Smarty is a template engine for PHP, facilitating the separation of presentation (HTML/CSS) from application logic. Prior to versions 3.1.45 and 4.1.1, template authors could inject php code by choosing a malicious {block} name or {include} file name. Sites that cannot fully trust template authors should upgrade to versions 3.1.45 or 4.1.1 to receive a patch for this issue. There are currently no known workarounds.
Weakness: CWE-94
Which versions are affected by CVE-2022-29221?
4 open source packages ship an affected version, including smarty/smarty. It affects 3 products.
| Package | Affected | Fixed in |
|---|---|---|
smarty/smarty Packagist | All versions | 3.1.45 |
smarty/smarty Packagist | All versions | 3.1.45 |
smarty/smarty Packagist | From 4.0.0 | 4.1.1 |
smarty/smarty Packagist | From 4.0.0 | 4.1.1 |
Products include Debian Debian Linux, Fedoraproject Fedora, Smarty Smarty.
How do I fix CVE-2022-29221?
Upgrade smarty/smarty to a fixed version for your release line: 3.1.45 or 4.1.1.
Upgrade, and never evaluate templates, expressions or code built from user input. More about Code injection.
Is CVE-2022-29221 being exploited?
There is no known exploitation of CVE-2022-29221 in the wild and no public exploit code.
Public exploit code: 1 proofs of concept on GitHub.
Other vulnerabilities in Debian Debian Linux
Sources
Also known as DEBIAN-CVE-2022-29221, DLA-3033-1, GHSA-634x-pc3q-cf4c, MGASA-2022-0226, UBUNTU-CVE-2022-29221, USN-6012-1.