CVE-2017-10614 : Exploit Details and Defense Strategies
Discover the impact of CVE-2017-10614, a vulnerability in Junos OS telnetd service allowing remote attackers to cause denial of service by consuming memory and CPU. Learn about affected systems and mitigation steps.
A vulnerability in the telnetd service on Junos OS allows a remote attacker to execute a denial of service attack by causing a limited consumption of memory and/or CPU. This CVE affects various versions of Juniper Networks Junos OS.
Understanding CVE-2017-10614
This CVE, published on October 11, 2017, highlights a security vulnerability in Junos OS related to the telnetd service.
What is CVE-2017-10614?
The vulnerability in the telnetd service on Junos OS enables a remote unauthenticated attacker to consume large amounts of CPU and/or memory, leading to a denial of service attack.
The Impact of CVE-2017-10614
The impact of this CVE is rated as medium severity with a CVSS base score of 5.3. The attack complexity is low, and the availability impact is low as well. No privileges are required for exploitation, and user interaction is not needed.
Technical Details of CVE-2017-10614
This section provides detailed technical information about the vulnerability.
Vulnerability Description
The vulnerability allows a remote attacker to cause a denial of service attack by consuming memory and CPU resources through the telnetd service on Junos OS.
Affected Systems and Versions
- Junos OS 12.1X46 prior to 12.1X46-D45
- Junos OS 12.3X48 prior to 12.3X48-D30
- Junos OS 14.1 prior to 14.1R4-S9, 14.1R8
- Junos OS 14.2 prior to 14.2R6
- Junos OS 15.1 prior to 15.1F5, 15.1R3
- Junos OS 15.1X49 prior to 15.1X49-D40
- Junos OS 15.1X53 prior to 15.1X53-D47, 15.1X53-D232
Exploitation Mechanism
The vulnerability can be exploited remotely by an unauthenticated attacker through the telnetd service on affected Junos OS versions.
Mitigation and Prevention
To address CVE-2017-10614, follow these mitigation strategies:
Immediate Steps to Take
- Disable telnet services to prevent exploitation.
- Limit access to the device by using access lists or firewall filters.
Long-Term Security Practices
- Regularly update Junos OS to the patched versions.
- Implement network segmentation to isolate critical infrastructure.
Patching and Updates
- Update to the following software releases: 12.1X46-D45, 12.3X48-D30, 14.1R4-S9, 14.1R8, 14.2R6, 15.1F5, 15.1R3, 15.1X49-D40, 15.1X53-D232, 15.1X53-D47, 16.1R1, and later.
- Track the issue as PR 1108483 on the Customer Support website.