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CVE-2023-24813— URI validation failure on SVG parsing. Bypass of CVE-2023-23924

Quick assessment

Affected
dompdf dompdf
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Dompdf是一个 HTML 到 PDF 的转换器。 Dompdf 存在安全漏洞，该漏洞源于 Dompdf 没有针对特殊输入进行过滤。

CVSS 10.0 · Critical EPSS 2.49% · P84
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I. Basic Information for CVE-2023-24813

Vulnerability Information
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Vulnerability Title
URI validation failure on SVG parsing. Bypass of CVE-2023-23924
Source: CVE Program / CVE List V5
Vulnerability Description
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 2.0.3. Users are advised to upgrade. There are no known workarounds for this vulnerability.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
解释冲突
Source: CVE Program / CVE List V5
Vulnerability Title
Dompdf 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Dompdf是一个 HTML 到 PDF 的转换器。 Dompdf 存在安全漏洞，该漏洞源于 Dompdf 没有针对特殊输入进行过滤。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
dompdf dompdf = 2.0.2 -

II. Public POCs for CVE-2023-24813

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III. Intelligence Information for CVE-2023-24813

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Patches & Fixes for CVE-2023-24813 (1)

Vendor Advisories for CVE-2023-24813 (1)

IV. Related Vulnerabilities

Same product: dompdf
Same vendor: dompdf
Same weakness: CWE-436

V. Comments for CVE-2023-24813

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