CVE-2023-23924
Description
Dompdf is an HTML to PDF converter. The URI validation on dompdf 2.0.1 can be bypassed on SVG parsing by passing `<image>` tags with uppercase letters. This may lead to arbitrary object unserialize on PHP < 8, through the `phar` URL wrapper. An attacker can exploit the vulnerability to call arbitrary URL with arbitrary protocols, if they can provide a SVG file to dompdf. In PHP versions before 8.0.0, it leads to arbitrary unserialize, that will lead to the very least to an arbitrary file deletion and even remote code execution, depending on classes that are available.
Predictions
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
Vendor advisory: debian — https://security-tracker.debian.org/tracker/CVE-2023-23924
OS impact
| OS | Version | Status | Fixed in |
|---|---|---|---|
| debian | bookworm | fixed | 0 |
| debian | bullseye | fixed | 0 |
| debian | sid | fixed | 0 |
Package impact
| Ecosystem | Package | Vulnerable | Fixed |
|---|---|---|---|
| Packagist | dompdf/dompdf | <2.0.2 | 2.0.2 |
References
- https://github.com/dompdf/dompdf/security/advisories/GHSA-3cw5-7cxw-v5qg
- https://nvd.nist.gov/vuln/detail/CVE-2023-23924
- https://github.com/dompdf/dompdf/commit/7558f07f693b2ac3266089f21051e6b78c6a0c85
- https://github.com/FriendsOfPHP/security-advisories/blob/master/dompdf/dompdf/CVE-2023-23924.yaml
- https://github.com/advisories/GHSA-3cw5-7cxw-v5qg
- https://github.com/dompdf/dompdf
- https://github.com/dompdf/dompdf/releases/tag/v2.0.2
- https://security-tracker.debian.org/tracker/CVE-2023-23924
Verify integrity in audit chain (admin only). AS-IS.