Vulnerability identifier: #VU20123

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-2019-8051

CWE-ID: CWE-416

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 compromise vulnerable system.

The vulnerability exists due to a boundary error within the handling of the userName property of Field objects in the AcroForm plugin. A remote attacker can create a specially crafted PDF file, trick the victim into opening it using the affected software, trigger use-after-free error and execute arbitrary code on the target system.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Adobe Reader: 2019.008.20071 - 2019.012.20035, 2017.009.20044 - 2017.012.20098, 2015.006.30306 - 2015.006.30498

Adobe Acrobat: 19.012.20035, 19.012.20034, 19.010.20100, 19.010.20098, 19.010.20091, 19.010.20069, 19.010.20064, 19.008.20080, 19.008.20081, 19.008.20071, 17.009.20044 - 17.012.20098, 15.006.30306 - 15.006.30498

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External links
http://helpx.adobe.com/security/products/acrobat/apsb19-41.html
http://www.zerodayinitiative.com/advisories/ZDI-19-754/

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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.