CVE-2017-6795 : What You Need to Know
Learn about CVE-2017-6795, a vulnerability in Cisco IOS XE Software on ASR 920 Series Routers that allows local attackers to modify device files. Find mitigation steps and prevention measures here.
Cisco IOS XE Software on Cisco ASR 920 Series Aggregation Services Routers is vulnerable to a weakness in the USB-modem code, potentially allowing a local attacker to modify files on the device's operating system.
Understanding CVE-2017-6795
This CVE involves a vulnerability in Cisco IOS XE Software that could be exploited by an authenticated local attacker to overwrite files on the underlying operating system of the affected device.
What is CVE-2017-6795?
The vulnerability stems from improper input validation of the platform usb modem command in the CLI of the affected software. By altering this command, an attacker could overwrite files on the device's operating system.
The Impact of CVE-2017-6795
If successfully exploited, this vulnerability could enable an attacker to modify any files on the affected device's underlying operating system, potentially leading to unauthorized access and data manipulation.
Technical Details of CVE-2017-6795
This section provides more in-depth technical insights into the vulnerability.
Vulnerability Description
The weakness in the USB-modem code of Cisco IOS XE Software allows a local attacker to manipulate files on the device's operating system by exploiting the platform usb modem command in the CLI.
Affected Systems and Versions
- Product: Cisco IOS XE
- Versions: Cisco IOS XE
Exploitation Mechanism
To exploit this vulnerability, the attacker needs to modify the platform usb modem command within the CLI of the affected device, enabling them to overwrite files on the device's operating system.
Mitigation and Prevention
Protecting systems from CVE-2017-6795 requires immediate actions and long-term security practices.
Immediate Steps to Take
- Apply patches and updates provided by Cisco to address the vulnerability.
- Monitor network traffic for any signs of unauthorized access or file modifications.
- Restrict access to vulnerable devices to authorized personnel only.
Long-Term Security Practices
- Regularly update and patch all software and firmware to prevent known vulnerabilities.
- Conduct security training for employees to raise awareness of potential threats and best practices.
Patching and Updates
Cisco has released patches to mitigate the vulnerability. Ensure all affected devices are updated with the latest security fixes.