CVE-2021-1352 : Vulnerability Insights and Analysis
Learn about CVE-2021-1352, a high-severity vulnerability in Cisco IOS XE Software allowing attackers to trigger DoS conditions. Understand the impact, affected systems, exploitation, and mitigation strategies.
A vulnerability in the DECnet Phase IV and DECnet/OSI protocol processing of Cisco IOS XE Software could allow an unauthenticated, adjacent attacker to cause a denial of service (DoS) condition on an affected device. The exploit could result in the affected device reloading, thus leading to a DoS scenario.
Understanding CVE-2021-1352
This section provides insights into the nature of the vulnerability and its potential impact.
What is CVE-2021-1352?
CVE-2021-1352 is a vulnerability in Cisco IOS XE Software that allows an adjacent attacker to trigger a DoS state on an affected device through DECnet Phase IV and DECnet/OSI protocol manipulation.
The Impact of CVE-2021-1352
The impact includes a high availability impact with a base score of 7.4 based on the CVSS v3.1 severity rating. However, confidentiality and integrity impacts are assessed as none.
Technical Details of CVE-2021-1352
This section delves into the technical aspects of the vulnerability, outlining affected systems, the exploitation mechanism, and more.
Vulnerability Description
The vulnerability arises from insufficient input validation of DECnet traffic received by affected devices, enabling attackers to exploit this flaw by sending malicious traffic.
Affected Systems and Versions
The vulnerability affects Cisco IOS XE Software, and all versions are susceptible to this issue.
Exploitation Mechanism
Attackers can exploit the vulnerability by crafting and sending DECnet traffic to targeted devices, causing them to reload and resulting in a denial of service.
Mitigation and Prevention
This section suggests immediate steps to take and long-term security practices to enhance protection against CVE-2021-1352.
Immediate Steps to Take
Network administrators are advised to apply patches or workarounds provided by Cisco to mitigate the vulnerability's exploitation.
Long-Term Security Practices
Implement network segmentation, access controls, and regular security updates to prevent similar vulnerabilities in the future.
Patching and Updates
Regularly check for security advisories and apply patches released by Cisco to address vulnerabilities and enhance system security.