CVE-2019-0047 : Vulnerability Insights and Analysis
Learn about CVE-2019-0047, a persistent Cross-Site Scripting (XSS) vulnerability in Junos OS J-Web interface allowing remote unauthenticated attackers to perform administrative actions. Find out impacted versions and mitigation steps.
Remote unauthenticated attackers may exploit a persistent Cross-Site Scripting (XSS) vulnerability in the Junos OS J-Web interface to carry out administrative actions on the Junos device. This CVE affects various versions of Juniper Networks Junos OS.
Understanding CVE-2019-0047
This CVE involves a persistent XSS vulnerability in the J-Web interface of Junos OS, potentially allowing unauthorized remote access to the device.
What is CVE-2019-0047?
A persistent Cross-Site Scripting (XSS) vulnerability in Junos OS J-Web interface may allow remote unauthenticated attackers to perform administrative actions on the Junos device.
The Impact of CVE-2019-0047
- CVSS Base Score: 8.8 (High)
- Attack Vector: Network
- Attack Complexity: Low
- Privileges Required: None
- User Interaction: Required
- Confidentiality Impact: High
- Integrity Impact: High
- Availability Impact: High
Technical Details of CVE-2019-0047
Successful exploitation requires J-Web to be enabled on the device.
Vulnerability Description
- The vulnerability allows remote unauthenticated attackers to exploit a persistent XSS issue in the J-Web interface.
Affected Systems and Versions
The following Juniper Networks Junos OS versions are affected:
- 12.1X46 before 12.1X46-D86
- 12.3 before 12.3R12-S13
- 14.1X53 before 14.1X53-D51
- And more, up to version 18.4
Exploitation Mechanism
To exploit this vulnerability, a Junos administrator needs to initiate specific diagnostic actions on J-Web.
Mitigation and Prevention
To address CVE-2019-0047, consider the following steps:
Immediate Steps to Take
- Disable J-Web on the affected devices.
- Limit access to the Junos device to only trusted hosts and networks.
Long-Term Security Practices
- Regularly update Junos OS to the latest patched versions.
- Implement network segmentation to restrict access to critical devices.
Patching and Updates
- Juniper Networks has released updated software versions to resolve this issue. Ensure your Junos OS is updated to versions starting from 12.1X46-D86 up to the latest release.