#VU17421 Deserialization of Untrusted Data in mpdf - CVE-2019-1000005

Vulnerability identifier: #VU17421

Vulnerability risk: High

CVSSv4.0: 7.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P/U:Amber]

CVE-ID: CVE-2019-1000005

CWE-ID: CWE-502

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
mpdf
Universal components / Libraries / Libraries used by multiple products

Vendor: mpdf

Description

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

The vulnerability exists in the getImage() method of the Image/ImageProcessor class due to insecure input validation when processing serialized data. A remote attacker can trick the victim into generating a PDF file with the affected application from a malicious image file, trigger a PHP deserialization through the phar:// wrapper and execute arbitrary code on the target system.

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

Mitigation
Update to version 7.1.8.

Vulnerable software versions

mpdf: 5.4.0 - 7.1.7

---

External links
https://github.com/mpdf/mpdf/issues/949

---

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.