#VU59312 Use-after-free in JT Utilities and JTTK - CVE-2021-44433

Vulnerability identifier: #VU59312

Vulnerability risk: High

CVSSv4.0: 6.1 [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:U/U:Amber]

CVE-ID: CVE-2021-44433

CWE-ID: CWE-416

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
JT Utilities
Other software / Other software solutions
JTTK
Other software / Other software solutions

Vendor: Siemens

Description

The vulnerability allows a remote attacker to compromise vulnerable system.

The vulnerability exists due to a use-after-free error while parsing specially crafted JT files. A remote attacker can trick a victim to open a specially crafted file and execute arbitrary code on the system.

Successful exploitation of the vulnerability may allow an attacker to compromise vulnerable system.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

JT Utilities: before 13.1.1.0

JTTK: before 11.1.1.0

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External links
https://ics-cert.us-cert.gov/advisories/icsa-21-350-17
https://cert-portal.siemens.com/productcert/pdf/ssa-802578.pdf

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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.