#VU85894 Uncontrolled Recursion in Dompdf - CVE-2023-50262

Vulnerability identifier: #VU85894

Vulnerability risk: Medium

CVSSv4.0: 2.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2023-50262

CWE-ID: CWE-674

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Dompdf
Web applications / Modules and components for CMS

Vendor: dompdf

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to infinite recursion when validating SVG images. A remote attacker can pass specially crafted input to the application and cause a denial of service condition on the target system.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Dompdf: 0.5.2 - 2.0.3

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External links
https://github.com/dompdf/dompdf/security/advisories/GHSA-3qx2-6f78-w2j2
https://github.com/dompdf/dompdf/commit/41cbac16f3cf56affa49f06e8dae66d0eac2b593
https://github.com/dompdf/dompdf/blob/v2.0.3/src/Image/Cache.php#L136-L153

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.