CVE-2017-12333 : Security Advisory and Response
Learn about CVE-2017-12333, a Cisco NX-OS System Software vulnerability allowing local attackers to bypass signature verification. Find mitigation steps and affected products.
A vulnerability in Cisco NX-OS System Software allows a local attacker to bypass signature verification during software image loading, impacting various Cisco products.
Understanding CVE-2017-12333
What is CVE-2017-12333?
A flaw in Cisco NX-OS System Software enables a local attacker with valid credentials to circumvent signature verification during software image loading.
The Impact of CVE-2017-12333
- Authorized local attackers can avoid signature verification and install unsigned software images on affected devices.
- Products impacted include Multilayer Director Switches, Nexus 7000 Series Switches, Nexus 7700 Series Switches, and Unified Computing System Manager.
Technical Details of CVE-2017-12333
Vulnerability Description
Insufficient verification of NX-OS signatures for software images allows attackers to load crafted, unsigned software images.
Affected Systems and Versions
- Product: Cisco NX-OS
- Version: Cisco NX-OS
Exploitation Mechanism
- Attackers need legitimate administrator credentials to exploit this vulnerability.
Mitigation and Prevention
Immediate Steps to Take
- Apply vendor-provided patches and updates promptly.
- Monitor Cisco's security advisories for any new information.
Long-Term Security Practices
- Implement the principle of least privilege for user access.
- Regularly review and update access controls and credentials.
- Conduct security training to educate users on best practices.
Patching and Updates
- Cisco has released patches to address this vulnerability.