CVE-2014-3812 in Junos Pulse
Summary
by MITRE
The Juniper Junos Pulse Secure Access Service (SSL VPN) devices with IVE OS before 7.4r5 and 8.x before 8.0r1 and Junos Pulse Access Control Service (UAC) before 4.4r5 and 5.x before 5.0r1 enable cipher suites with weak encryption algorithms, which make it easier for remote attackers to obtain sensitive information by sniffing the network.
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Analysis
by VulDB Data Team • 08/09/2021
The vulnerability identified as CVE-2014-3812 affects Juniper Junos Pulse Secure Access Service and Junos Pulse Access Control Service devices running specific versions of the IVE OS and UAC software. This issue represents a significant cryptographic weakness that undermines the security of SSL VPN connections. The affected systems include IVE OS versions before 7.4r5 and 8.x before 8.0r1, along with UAC versions before 4.4r5 and 5.x before 5.0r1, creating a substantial attack surface for malicious actors targeting enterprise network access points.
The technical flaw stems from the implementation of cipher suites that utilize weak encryption algorithms, specifically those that do not provide adequate cryptographic strength for modern security requirements. This weakness allows attackers to perform man-in-the-middle attacks or passive network monitoring to capture and analyze SSL VPN traffic. The vulnerability is categorized under CWE-327, which deals with the use of weak cryptographic algorithms, and aligns with ATT&CK technique T1041 for data encryption for exfiltration. The implementation of these weak cipher suites effectively reduces the encryption strength to levels that can be broken through computational attacks or by leveraging advanced cryptographic techniques.
The operational impact of this vulnerability is severe for organizations relying on Juniper SSL VPN solutions for remote access. Attackers can exploit this weakness to intercept and decrypt sensitive communications between remote users and corporate networks, potentially gaining access to confidential data, credentials, and business-critical information. The vulnerability is particularly dangerous because it operates at the network level, allowing attackers to perform passive sniffing activities without requiring active interaction with the target systems. This makes detection extremely difficult and increases the risk of prolonged unauthorized access to enterprise resources.
Mitigation strategies for CVE-2014-3812 should prioritize immediate patching of affected systems to the latest secure versions of IVE OS and UAC software. Organizations must also implement strict cipher suite configuration policies that disable weak encryption algorithms and enforce the use of strong cryptographic standards such as TLS 1.2 with high-strength cipher suites. Network administrators should conduct comprehensive security audits to identify and remediate any remaining vulnerable configurations, while implementing network monitoring solutions that can detect anomalous traffic patterns indicative of active exploitation attempts. The vulnerability demonstrates the critical importance of maintaining up-to-date security patches and adhering to cryptographic best practices as outlined in NIST SP 800-57 and other industry standards for secure communications.