Of the eight vulnerabilities for which Cisco published an advisory this week, only CVE-2020-3297 has been rated high severity. This security hole affects some Small Business and managed switches and it allows a remote, unauthenticated attacker to access a device’s management interface by hijacking a legitimate user’s session.
“The vulnerability is due to the use of weak entropy generation for session identifier values,” Cisco explained in an advisory. “An attacker could exploit this vulnerability to determine a current session identifier through brute force and reuse that session identifier to take over an ongoing session. In this way, an attacker could take actions within the management interface with privileges up to the level of the administrative user.”