CVE-2020-1647 : Vulnerability Insights and Analysis

On Juniper Networks SRX Series with ICAP (Internet Content Adaptation Protocol) redirect service enabled, a double free vulnerability can lead to a Denial of Service (DoS) or Remote Code Execution (RCE) due to the processing of a specific HTTP message. Learn about the impact, technical details, and mitigation steps related to this CVE.

Understanding CVE-2020-1647

This CVE pertains to a vulnerability on Juniper Networks SRX Series when the ICAP redirect service is active.

What is CVE-2020-1647?

CVE-2020-1647 addresses a double free vulnerability on Juniper Networks SRX Series. The issue arises when processing a specific HTTP message with the ICAP redirect service enabled, potentially leading to DoS or RCE.

The Impact of CVE-2020-1647

Severity: Critical (CVSS Base Score: 9.8)
Attack Vector: Network
Impact: High impact on Availability, Confidentiality, and Integrity

Technical Details of CVE-2020-1647

This section covers vulnerability description, affected systems and versions, and the exploitation mechanism.

Vulnerability Description

The vulnerability stems from processing specific HTTP messages with the ICAP redirect service enabled, resulting in a double free issue that can lead to DoS or RCE.

Affected Systems and Versions

Affected Versions: 18.1R3-S9, 18.2R3-S3, 18.3R2-S4, 18.3R3-S1, 18.4R2-S5, 18.4R3, 19.1R2, 19.2R1-S2, 19.2R2, 19.3R2
Unaffected: Versions prior to 18.1R1
Affected Platform: Junos OS on SRX Series

Exploitation Mechanism

The vulnerability can be exploited by processing a specific HTTP message with the ICAP redirect service enabled, potentially resulting in a DoS or RCE.

Mitigation and Prevention

Take immediate steps and adopt long-term security practices to mitigate the risks associated with CVE-2020-1647.

Immediate Steps to Take

Disable ICAP redirect service to prevent exploitation of the vulnerability

Long-Term Security Practices

Regularly update Junos OS to the latest patched versions

Patching and Updates

Apply the following software releases or later versions to address the issue: 18.1R3-S9, 18.2R3-S3, 18.3R2-S4, 18.3R3-S1, 18.4R2-S5, 18.4R3, 19.1R2, 19.2R1-S2, 19.2R2, 19.3R2, 19.4R1, and subsequent releases.