#VU70893 Use-after-free in Adobe Acrobat and Adobe Reader - CVE-2023-21608

Vulnerability identifier: #VU70893

Vulnerability risk: High

CVSSv4.0: 8.4 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:A/U:Amber]

CVE-ID: CVE-2023-21608

CWE-ID: CWE-416

Exploitation vector: Network

Exploit availability: Yes

Vulnerable software:
Adobe Acrobat
Client/Desktop applications / Office applications
Adobe Reader
Client/Desktop applications / Office applications

Vendor: Adobe

Description

The vulnerability allows a remote attacker to compromise vulnerable system.

The vulnerability exists due to a use-after-free error within the resetForm method when processing PDF files. A remote attacker can trick the victim to open a specially crafted PDF 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

Adobe Acrobat: 20.001.30002 - 20.013.20074, 22.001.20085 - 22.003.20282

Adobe Reader: 20.005.30331 - 20.005.30418, 22.001.20085 - 22.003.20282

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External links
https://helpx.adobe.com/security/products/acrobat/apsb23-01.html
https://www.zerodayinitiative.com/advisories/ZDI-23-061/

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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?

Yes. This vulnerability is being exploited in the wild.