CVE-2017-10601 Explained : Impact and Mitigation
Learn about CVE-2017-10601, a critical vulnerability in Juniper Networks Junos OS allowing unauthorized user login without password prompts. Find mitigation steps and necessary software updates.
A vulnerability in Juniper Networks Junos OS allows users to bypass authentication under specific system configuration errors.
Understanding CVE-2017-10601
This CVE involves an authentication bypass vulnerability in Junos OS, impacting various versions of the software.
What is CVE-2017-10601?
The vulnerability allows users to log in without a password prompt when attempting to access the system through various methods like console, ssh, ftp, telnet, or su. It relies on a specific device configuration precondition.
The Impact of CVE-2017-10601
- CVSS Base Score: 9.8 (Critical)
- Attack Vector: Network
- Attack Complexity: Low
- Privileges Required: None
- Confidentiality Impact: High
- Integrity Impact: High
- Availability Impact: High
- Scope: Unchanged
- User Interaction: None
Technical Details of CVE-2017-10601
This section covers the technical aspects of the vulnerability.
Vulnerability Description
The issue arises from a commit failure condition due to a specific device configuration, allowing unauthorized access without password prompts.
Affected Systems and Versions
- Junos OS 12.3 prior to 12.3R10, 12.3R11
- Junos OS 12.3X48 prior to 12.3X48-D20
- Junos OS 13.2 prior to 13.2R8
- Junos OS 13.3 prior to 13.3R7
- Junos OS 14.1 prior to 14.1R4-S12, 14.1R5, 14.1R6
- Junos OS 14.1X53 prior to 14.1X53-D30
- Junos OS 14.2 prior to 14.2R4
- Junos OS 15.1 prior to 15.1F2, 15.1F3, 15.1R2
Exploitation Mechanism
The vulnerability was discovered during internal product security testing, and no malicious exploitation has been reported.
Mitigation and Prevention
Steps to address and prevent the CVE-2017-10601 vulnerability.
Immediate Steps to Take
- Ensure authentication functions correctly after system configuration changes.
- Implement SSH certificate-based authentication.
- Use access lists or firewall filters to restrict device access to trusted administrative hosts, networks, and users.
Long-Term Security Practices
- Regularly review and update device configurations.
- Monitor for unauthorized access attempts.
- Stay informed about security updates and patches.
Patching and Updates
- Update to the following software releases: 12.3R10, 12.3R11, 12.3X48-D20, 13.2R8, 13.3R7, 14.1R4-S12, 14.1R5, 14.1R6, 14.1X53-D30, 14.2R4, 15.1F2, 15.1F3, 15.1R2, 15.1X49-D10, 16.1R1, and subsequent releases.
- Track the issue as PR 1075580 on the Customer Support website.