Vulnerability identifier: #VU74926

Vulnerability risk: High

CVSSv3.1: 7.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2023-26421

CWE-ID: CWE-191

Exploitation vector: Network

Exploit availability: No

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

Vendor: Adobe

Description

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

The vulnerability exists due to integer underflow. A remote attacker can trick the victim to open a specially crafted PDF file, trigger an integer underflow and execute arbitrary code on the target system.

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

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Adobe Reader: 23.001.20064 - 23.001.20093, 20.005.30331 - 20.005.30441, 17.012.30227 - 17.012.30229, 22.001.20085 - 22.001.20117, 2020.001.30002 - 2020.013.20074, 2017.008.30051 - 2017.012.30229, 2019.008.20071 - 2019.021.20061, 2015.006.30306 - 2015.006.30527, 2018.009.20044 - 2018.011.20063

Adobe Acrobat: 21.001.20135 - 21.011.20039, 22.001.20085 - 22.001.20117, 23.001.20064 - 23.001.20093, 20.001.30002 - 20.013.20074, 17.008.30051 - 17.012.30229, 15.006.30306 - 15.006.30527

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External links
http://helpx.adobe.com/security/products/acrobat/apsb23-24.html
http://www.zerodayinitiative.com/advisories/ZDI-23-430/

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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.