Описание
Dompdf is an HTML to PDF converter written in php. Due to the difference in the attribute parser of Dompdf and php-svg-lib, an attacker can still call arbitrary URLs with arbitrary protocols. Dompdf parses the href attribute of image tags and respects xlink:href even if href is specified. However, php-svg-lib, which is later used to parse the svg file, parses the href attribute. Since href is respected if both xlink:href and href is specified, it's possible to bypass the protection on the Dompdf side by providing an empty xlink:href attribute. An attacker can exploit the vulnerability to call arbitrary URLs with arbitrary protocols if they provide an SVG file to the Dompdf. In PHP versions before 8.0.0, it leads to arbitrary unserialize, which will lead, at the very least, to arbitrary file deletion and might lead to remote code execution, depending on available classes. This vulnerability has been addressed in commit 95009ea98 which has been included in release version
Ссылки
- PatchVendor Advisory
- ExploitVendor Advisory
- PatchVendor Advisory
- ExploitVendor Advisory
Уязвимые конфигурации
EPSS
10 Critical
CVSS3
9.8 Critical
CVSS3
Дефекты
Связанные уязвимости
Dompdf is an HTML to PDF converter written in php. Due to the difference in the attribute parser of Dompdf and php-svg-lib, an attacker can still call arbitrary URLs with arbitrary protocols. Dompdf parses the href attribute of `image` tags and respects `xlink:href` even if `href` is specified. However, php-svg-lib, which is later used to parse the svg file, parses the href attribute. Since `href` is respected if both `xlink:href` and `href` is specified, it's possible to bypass the protection on the Dompdf side by providing an empty `xlink:href` attribute. An attacker can exploit the vulnerability to call arbitrary URLs with arbitrary protocols if they provide an SVG file to the Dompdf. In PHP versions before 8.0.0, it leads to arbitrary unserialize, which will lead, at the very least, to arbitrary file deletion and might lead to remote code execution, depending on available classes. This vulnerability has been addressed in commit `95009ea98` which has been included in release vers...
Dompdf is an HTML to PDF converter written in php. Due to the differen ...
URI validation failure on SVG parsing. Bypass of CVE-2023-23924
Уязвимость PHP-библиотеки генерации PDF-документов из HTML-разметки и CSS-стилей Dompdf, связанная с возникновением конфликта интерпретаций, позволяющая нарушителю выполнить произвольный код
EPSS
10 Critical
CVSS3
9.8 Critical
CVSS3