CVE-2024-25117 php-svg-lib lacks path validation on font through SVG inline styles
Attackers can achieve remote code execution by injecting PHAR URLs into SVG font-family attributes, affecting applications using php-svg-lib.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2024-25117?
CVE-2024-25117 is a medium-severity unsafe deserialization vulnerability in dompdf php-svg-lib, published on 21 Feb 2024. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
php-svg-lib is a scalable vector graphics (SVG) file parsing/rendering library. Prior to version 0.5.2, php-svg-lib fails to validate that font-family doesn't contain a PHAR url, which might leads to RCE on PHP < 8.0, and doesn't validate if external references are allowed. This might leads to bypass of restrictions or RCE on projects that are using it, if they do not strictly revalidate the fontName that is passed by php-svg-lib. The `Style::fromAttributes(`), or the `Style::parseCssStyle()` should check the content of the `font-family` and prevents it to use a PHAR url, to avoid passing an invalid and dangerous `fontName` value to other libraries. The same check as done in the `Style::fromStyleSheets` might be reused. Libraries using this library as a dependency might be vulnerable to some bypass of restrictions, or even remote code execution, if they do not double check the value of the `fontName` that is passed by php-svg-lib. Version 0.5.2 contains a fix for this issue.
Which versions are affected by CVE-2024-25117?
2 open source packages ship an affected version, including phenx/php-svg-lib. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
phenx/php-svg-lib Packagist | All versions | 0.5.2 |
phenx/php-svg-lib Packagist | All versions | 0.5.2 |
Products include Dompdf Php-Svg-Lib.
How do I fix CVE-2024-25117?
Upgrade phenx/php-svg-lib to 0.5.2 or later.
Upgrade, and only deserialise data from trusted sources or with an allow-list of types. More about Unsafe deserialization.
Is CVE-2024-25117 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2024-25117 exists.
Other vulnerabilities in dompdf php-svg-lib
Sources
Also known as DEBIAN-CVE-2024-25117, GHSA-f3qr-qr4x-j273.