CVE-2016-1280 in Junos
Summary
by MITRE
PKId in Juniper Junos OS before 12.1X44-D52, 12.1X46 before 12.1X46-D37, 12.1X47 before 12.1X47-D30, 12.3 before 12.3R12, 12.3X48 before 12.3X48-D20, 13.3 before 13.3R10, 14.1 before 14.1R8, 14.1X53 before 14.1X53-D40, 14.2 before 14.2R7, 15.1 before 15.1R4, 15.1X49 before 15.1X49-D20, 15.1X53 before 15.1X53-D60, and 16.1 before 16.1R1 allow remote attackers to bypass an intended certificate validation mechanism via a self-signed certificate with an Issuer name that matches a valid CA certificate enrolled in Junos.
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Analysis
by VulDB Data Team • 09/02/2022
The vulnerability identified as CVE-2016-1280 represents a critical certificate validation flaw within Juniper Junos OS versions spanning multiple release branches including 12.1X44-D52, 12.1X46-D37, 12.1X47-D30, 12.3R12, 12.3X48-D20, 13.3R10, 14.1R8, 14.1X53-D40, 14.2R7, 15.1R4, 15.1X49-D20, 15.1X53-D60, and 16.1R1. This issue stems from an insufficient validation mechanism that permits attackers to bypass intended security controls through the exploitation of a specific certificate manipulation technique. The flaw specifically affects the certificate validation process where the system fails to properly verify the complete certificate chain and trust relationships, allowing malicious actors to craft self-signed certificates that appear legitimate due to matching issuer names with valid CA certificates already enrolled in the system.
The technical implementation of this vulnerability resides in the certificate validation logic within the PKI (Public Key Infrastructure) subsystem of Junos OS, which operates under the broader context of cryptographic security controls. According to CWE-310, this represents a weakness in cryptographic key generation and management, specifically related to certificate validation mechanisms that fail to properly authenticate the complete certificate chain. The vulnerability manifests when the system accepts a self-signed certificate that shares the same Issuer name as a legitimate CA certificate, effectively bypassing the intended certificate validation process that should ensure proper chain of trust and certificate authenticity. This flaw aligns with ATT&CK technique T1552.001, which involves the exploitation of credentials in the form of certificates and keys, allowing adversaries to establish unauthorized trust relationships.
The operational impact of CVE-2016-1280 is severe as it fundamentally undermines the integrity of the certificate-based authentication system that Junos devices rely upon for secure remote access and network communications. Attackers can leverage this vulnerability to establish man-in-the-middle positions, impersonate legitimate network components, or gain unauthorized access to network devices through forged certificates. The implications extend beyond simple authentication bypass, potentially allowing for complete compromise of network security controls, as the system's trust model becomes vulnerable to manipulation. This vulnerability particularly affects network infrastructure devices that depend on certificate validation for secure remote management, configuration access, and secure communication protocols such as SSH, HTTPS, and TLS-based services.
Mitigation strategies for CVE-2016-1280 require immediate implementation of software updates to the affected Junos OS versions, with administrators prioritizing deployment of the patched releases that address the certificate validation flaw. Organizations should also implement additional monitoring for unauthorized certificate changes or deployments within their network infrastructure, utilizing certificate monitoring tools that can detect anomalous certificate patterns or unexpected certificate installations. Network segmentation and additional authentication layers should be considered as temporary compensating controls while patches are deployed. The remediation process must include thorough validation of certificate configurations across all affected devices, ensuring that the updated systems properly enforce complete certificate chain validation and that no vulnerable configurations remain in place. Additionally, administrators should conduct comprehensive security assessments to identify any potential exploitation that may have already occurred through this vulnerability, particularly focusing on certificate-based access controls and authentication mechanisms that rely on the compromised PKI validation process.