Vulnerability identifier: #VU48712

Vulnerability risk: Medium

CVSSv3.1: 6.4 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:U/RL:O/RC:C]

CVE-ID: N/A

CWE-ID: CWE-20

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Foxit PDF Editor (formerly Foxit PhantomPDF)
Client/Desktop applications / Office applications
Foxit Reader for Mac
Client/Desktop applications / Office applications

Vendor: Foxit Software Inc.

Description

The vulnerability allows a remote attacker to compromise the target system.

The vulnerability exists due to the application fails to identify the objects in the incremental update when the Subtype entry of the Annotation dictionary is set as null. A remote attacker can perform the Evil Annotation Attack and deliver incorrect validation results when validating certain certified PDF files whose visible content was significantly altered.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Foxit PDF Editor (formerly Foxit PhantomPDF): 4.1.0.1023

Foxit Reader for Mac: 4.1.0.1023

---

External links
http://www.foxitsoftware.com/support/security-bulletins.html?Security+updates+available+in+Foxit+PhantomPDF+Mac+4.1.1+and+Foxit+Reader+Mac+4.1.12020-11-30+00%3A00%3A00

---

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.