CVE-2017-6768 : Security Advisory and Response

Cisco Systems, Inc. Application Policy Infrastructure Controller (APIC) devices are vulnerable to a privilege escalation issue that could allow an authenticated attacker to gain root-level privileges during boot time.

Understanding CVE-2017-6768

This CVE identifies a vulnerability in the build process of certain executable system files on Cisco APIC devices, potentially leading to privilege escalation.

What is CVE-2017-6768?

An authenticated, local attacker could exploit a vulnerability in the build process of executable system files on Cisco APIC devices to gain root-level privileges during boot time.
The issue arises from a custom executable system file that uses relative search paths for libraries without proper validation, allowing the loading of a malicious library to escalate privilege levels.
Successful exploitation grants the attacker complete control over the device, requiring valid user credentials for authentication.

The Impact of CVE-2017-6768

Attackers could achieve root-level privileges on Cisco APIC devices, compromising the security and integrity of the system.

Technical Details of CVE-2017-6768

This section delves into the specific technical aspects of the vulnerability.

Vulnerability Description

The vulnerability in the build process of executable system files on Cisco APIC devices enables privilege escalation for authenticated attackers.

Affected Systems and Versions

Versions affected include 1.1(0.920a), 1.1(1j), 1.1(3f); 1.2 Base, 1.2(2), 1.2(3), 1.2.2; 1.3(1), 1.3(2), 1.3(2f); 2.0 Base, 2.0(1).

Exploitation Mechanism

Attackers authenticate to the device and load a malicious library to exploit the vulnerability, gaining root-level privileges.

Mitigation and Prevention

Protecting systems from CVE-2017-6768 requires immediate actions and long-term security practices.

Immediate Steps to Take

Apply vendor-supplied patches and updates promptly to mitigate the vulnerability.
Monitor and restrict access to vulnerable devices to prevent unauthorized exploitation.

Long-Term Security Practices

Implement strong authentication mechanisms to control access to critical devices.
Regularly review and update security configurations to address potential vulnerabilities.

Patching and Updates

Regularly check for security advisories and updates from Cisco Systems, Inc. to address CVE-2017-6768.