Vulnerability identifier: #VU53767

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-2021-31500

CWE-ID: CWE-822

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Brava! Desktop
Client/Desktop applications / Other client software

Vendor:

Description

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

The vulnerability exists due to untrusted pointer dereference when parsing DWF files. A remote attacker can trick a victim to open a specially crafted file or visit a malicious website and execute arbitrary code on the targeted system.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

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External links
http://www.zerodayinitiative.com/advisories/ZDI-21-640/

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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.