CVE-2021-34736 Explained : Impact and Mitigation
Discover the impact and technical details of CVE-2021-34736, a vulnerability in Cisco Integrated Management Controller (IMC) Software allowing remote attackers to cause a denial of service condition.
A vulnerability in the web-based management interface of Cisco Integrated Management Controller (IMC) Software could allow an unauthenticated, remote attacker to cause the web-based management interface to unexpectedly restart.
Understanding CVE-2021-34736
This CVE relates to a denial of service vulnerability in the web-based management interface of Cisco Integrated Management Controller (IMC) Software.
What is CVE-2021-34736?
The vulnerability in Cisco IMC Software allows a remote, unauthenticated attacker to disrupt the web-based management interface by sending a crafted HTTP request, leading to a denial of service condition.
The Impact of CVE-2021-34736
Exploitation can result in a denial of service (DoS) condition, causing the interface to restart unexpectedly, impacting availability.
Technical Details of CVE-2021-34736
The vulnerability's CVSS Base Score is 5.3, with a Medium severity level. It requires no user interaction and affects the availability of the system over the network.
Vulnerability Description
Insufficient input validation on the web-based management interface of Cisco IMC Software allows attackers to disrupt the interface, triggering a DoS.
Affected Systems and Versions
The vulnerability affects Cisco Unified Computing System (Managed), with the specific affected version labeled as 'n/a'.
Exploitation Mechanism
By sending a specially crafted HTTP request, remote attackers can exploit the vulnerability to disrupt the web-based management interface.
Mitigation and Prevention
To address CVE-2021-34736:
Immediate Steps to Take
- Monitor Cisco advisories for updates related to this vulnerability.
- Implement network-based access control lists to restrict traffic to the affected interface.
Long-Term Security Practices
- Regularly update and patch Cisco IMC Software to mitigate known vulnerabilities.
- Conduct periodic security assessments and penetration testing.
Patching and Updates
Apply vendor-released patches to fix the vulnerability and prevent exploitation.