CVE-2017-3858 : Security Advisory and Response
Learn about CVE-2017-3858, a command injection vulnerability in Cisco IOS XE Software allowing remote attackers to execute commands with root privileges. Find mitigation steps and patching advice here.
A vulnerability in Cisco IOS XE Software's web framework allows a remote attacker with authenticated access to inject arbitrary commands, potentially leading to the execution of commands with root privileges.
Understanding CVE-2017-3858
This CVE involves a command injection vulnerability in Cisco IOS XE Software, impacting devices running Release 16.2.1 with the HTTP Server feature enabled.
What is CVE-2017-3858?
The flaw in Cisco IOS XE Software's web framework allows an attacker to inject commands with root privileges by exploiting inadequate validation of HTTP parameters.
The Impact of CVE-2017-3858
If successfully exploited, an attacker could execute commands with root privileges on affected Cisco devices running Release 16.2.1 with the HTTP Server feature enabled.
Technical Details of CVE-2017-3858
This section provides detailed technical information about the vulnerability.
Vulnerability Description
The vulnerability arises from insufficient validation of HTTP parameters, enabling authenticated attackers to inject and execute arbitrary commands with root privileges.
Affected Systems and Versions
- Cisco devices running Cisco IOS XE Software Release 16.2.1 with the HTTP Server feature enabled
- Devices with the newly redesigned web-based administration interface introduced in the Denali 16.2 Release
Exploitation Mechanism
- Attacker authenticates to the device
- Submits carefully crafted input via the affected web page parameter
- Commands are executed with root privileges
Mitigation and Prevention
Protect your systems from CVE-2017-3858 with these mitigation strategies.
Immediate Steps to Take
- Disable the HTTP Server feature if not required
- Implement strong authentication mechanisms
- Regularly monitor and audit web-based administration interfaces
Long-Term Security Practices
- Keep systems up to date with the latest security patches
- Conduct regular security training for staff
Patching and Updates
- Apply relevant patches and updates from Cisco to address the vulnerability