CVE-2021-34739 : Exploit Details and Defense Strategies
Learn about CVE-2021-34739, a high-severity vulnerability in Cisco Small Business Series Switches allowing unauthorized access to the device. Find mitigation steps and best practices here.
A vulnerability in the web-based management interface of multiple Cisco Small Business Series Switches could allow an unauthenticated, remote attacker to replay valid user session credentials and gain unauthorized access to the web-based management interface of an affected device.
Understanding CVE-2021-34739
This CVE identifies a session credentials replay vulnerability in Cisco Small Business Series Switches.
What is CVE-2021-34739?
The vulnerability allows an attacker to intercept and replay valid user session credentials to access the web-based management interface of the affected device with administrator privileges.
The Impact of CVE-2021-34739
With a CVSS base score of 8.1, this high-severity vulnerability could result in unauthorized access to sensitive information stored on the device.
Technical Details of CVE-2021-34739
This section provides insights into the vulnerability, affected systems, and the exploitation mechanism.
Vulnerability Description
The vulnerability is caused by insufficient expiration of session credentials, enabling a man-in-the-middle attack to intercept and misuse valid credentials.
Affected Systems and Versions
All versions of Cisco Small Business Smart and Managed Switches are impacted by this vulnerability.
Exploitation Mechanism
An attacker could exploit the vulnerability by intercepting valid session credentials through a man-in-the-middle attack and using them to gain unauthorized access to the device.
Mitigation and Prevention
Discover the immediate steps and long-term best practices to safeguard against CVE-2021-34739.
Immediate Steps to Take
Implement network segmentation, monitor for unauthorized access, and apply vendor-recommended security updates promptly.
Long-Term Security Practices
Enforce strong password policies, conduct regular security audits, and educate users on cybersecurity best practices.
Patching and Updates
Regularly check for security advisories from Cisco and apply patches to mitigate the vulnerability efficiently.