#VU71373 Command Injection in iText - CVE-2021-43113

Vulnerability identifier: #VU71373

Vulnerability risk: High

CVSSv4.0: 8.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]

CVE-ID: CVE-2021-43113

CWE-ID: CWE-77

Exploitation vector: Network

Exploit availability: No

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

Vendor: iText Group NV

Description

The vulnerability allows a remote attacker to compromise the affected system.

The vulnerability exists due to improper input validation within the GhostscriptHelper.java when processing data passed via a CompareTool filename. A remote attacker can pass a specially crafted file to the application and execute arbitrary Java code on the system.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

iText: 7.0.0 - 7.1.16

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External links
https://pastebin.com/BXnkY9YY
https://github.com/itext/itext7/releases/tag/7.1.17
https://lists.debian.org/debian-lts-announce/2023/01/msg00013.html

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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.