CVE-2020-3604: Cisco WebEx Network Recording Player ARF File Parsing Stack-based Buffer Overflow Remote Code Execution Vulnerability
Multiple vulnerabilities in Cisco Webex Network Recording Player for Windows and Cisco Webex Player for Windows could allow an attacker to execute arbitrary code on an affected system. The vulnerabilities are due to insufficient validation of certain elements of a Webex recording that is stored in the Advanced Recording Format (ARF) or Webex Recording Format (WRF). An attacker could exploit these vulnerabilities by sending a user a malicious ARF or WRF file through a link or email attachment and persuading the user to open the file with the affected software on the local system. A successful exploit could allow the attacker to execute arbitrary code on the affected system with the privileges of the targeted user.
Other sources
This vulnerability allows remote attackers to execute arbitrary code on affected installations of Cisco WebEx Network Recording Player. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file. The specific flaw exists within the parsing of ARF files. The issue results from the lack of proper validation of the length of user-supplied data prior to copying it to a fixed-length stack-based buffer. An attacker can leverage this vulnerability to execute code in the context of the current process.
— ZDI
Affected Software
Event History
Frequently Asked Questions
What is CVE-2020-3604?
CVE-2020-3604 is a vulnerability in Cisco WebEx Network Recording Player and Cisco Webex Player for Windows that allows an attacker to execute arbitrary code on an affected system.
How severe is CVE-2020-3604?
CVE-2020-3604 has a severity rating of 7.8, making it critical.
What is the affected software for CVE-2020-3604?
The affected software includes Cisco Webex Meetings versions up to 40.6.11 and versions between 40.7.0 and 40.8.0.
How can an attacker exploit CVE-2020-3604?
An attacker can exploit CVE-2020-3604 by sending a specially crafted Webex recording file, which triggers a stack-based buffer overflow and allows them to execute arbitrary code on the system.
How can I fix CVE-2020-3604?
To fix CVE-2020-3604, it is recommended to update to the latest version of Cisco Webex Meetings.