#VU102264 Improper certificate validation in TCPDF - CVE-2024-56521

Vulnerability identifier: #VU102264

Vulnerability risk: Low

CVSSv4.0: 1.2 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2024-56521

CWE-ID: CWE-295

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
TCPDF
Web applications / Other software

Vendor: Nicola Asuni

Description

The vulnerability allows a remote attacker to perform MitM attack.

The vulnerability exists due to improper certificate validation when using CURLOPT_SSL_VERIFYHOST and CURLOPT_SSL_VERIFYPEER. A remote attacker can perform MitM attack and pass spoofed content into PDF file.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

TCPDF: 6.0.0 - 6.7.8

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External links
https://github.com/tecnickcom/TCPDF/commit/aab43ab0a824e956276141a28a24c7c0be20f554
https://github.com/advisories/GHSA-9mgx-552f-59p6

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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.