Remote code execution in Dompdf

1) Deserialization of Untrusted Data

EUVDB-ID: #VU72000

Risk: High

CVSSv3.1: 8.8 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C]

CVE-ID: CVE-2023-24813

CWE-ID: CWE-502 - Deserialization of Untrusted Data

Exploit availability: Yes

Description

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to insecure input validation when processing serialized data when parsing external URLs in SVG files. A remote attacker can pass specially crafted data to the application and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Note, the vulnerability exists due to incomplete fix for #VU71762 (CVE-2023-23924).

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Dompdf: 2.0.0 - 2.0.2

External links

http://github.com/dompdf/dompdf/releases/tag/v2.0.3
http://github.com/dompdf/dompdf/security/advisories/GHSA-56gj-mvh6-rp75

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.