#VU85893 Uncontrolled Recursion in php-svg-lib - CVE-2023-50251

Vulnerability identifier: #VU85893

Vulnerability risk: Medium

CVSSv4.0: 5.5 [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:P/U:Green]

CVE-ID: CVE-2023-50251

CWE-ID: CWE-674

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
php-svg-lib
Universal components / Libraries / Libraries used by multiple products

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 parsing SVG document. 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

php-svg-lib: 0.1 - 0.5.0

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External links
https://github.com/dompdf/php-svg-lib/security/advisories/GHSA-ff5x-7qg5-vwf2
https://github.com/dompdf/php-svg-lib/commit/88163cbe562d9b391b3a352e54d9c89d02d77ee0

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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. However, proof of concept for this vulnerability is available.