CVE-2024-25117: php Insecure Deserialization — Fix

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.

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CVSS v3.1 Score

6.8

MEDIUM

CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:L

Weakness Type (CWE)

CWE-73 CWE-73

CWE-502 Deserialization of Untrusted Data

CWE-610 CWE-610

Affected Products

Vendor	Product	Versions
dompdf	php-svg-lib	< 0.5.2
php	php	< 8.0.0

References

Advisories & Patches

https://github.com/dompdf/php-svg-lib/commit/732faa9fb4309221e2bd9b2fda5de44f947133aa https://github.com/dompdf/php-svg-lib/commit/8ffcc41bbde39f09f94b9760768086f12bbdce42 https://github.com/dompdf/php-svg-lib/security/advisories/GHSA-f3qr-qr4x-j273 https://github.com/dompdf/php-svg-lib/commit/732faa9fb4309221e2bd9b2fda5de44f947133aa https://github.com/dompdf/php-svg-lib/commit/8ffcc41bbde39f09f94b9760768086f12bbdce42 https://github.com/dompdf/php-svg-lib/security/advisories/GHSA-f3qr-qr4x-j273

Frequently Asked Questions

What is CVE-2024-25117? +

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. It has a CVSS v3.1 base score of 6.8 (MEDIUM).

How severe is CVE-2024-25117? +

CVE-2024-25117 has a CVSS v3.1 score of 6.8 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance.

What products are affected by CVE-2024-25117? +

CVE-2024-25117 affects products from dompdf, php, specifically: php, php-svg-lib. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2024-25117? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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