#VU70882 Out-of-bounds read in Adobe Acrobat and Adobe Reader - CVE-2023-21581

Vulnerability identifier: #VU70882

Vulnerability risk: Low

CVSSv4.0: 1 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2023-21581

CWE-ID: CWE-125

Exploitation vector: Network

Exploit availability: No

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 gain access to potentially sensitive information.

The vulnerability exists due to a boundary condition when handling embedded fonts. A remote attacker can create a specially crafted PDF file, trick the victim into opening it, trigger out-of-bounds read error and read contents of memory on the 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-23-081/

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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.