CVE-2020-9087 in Taurus-AL00A
Summary
by MITRE • 10/12/2020
Taurus-AL00A version 10.0.0.1(C00E1R1P1) has an out-of-bounds read vulnerability in XFRM module. An authenticated, local attacker may perform a specific operation to exploit this vulnerability. Due to insufficient validation of the parameters, which may be exploited to cause information leak.
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Analysis
by VulDB Data Team • 11/18/2020
The vulnerability identified as CVE-2020-9087 affects Taurus-AL00A devices running firmware version 10.0.0.1(C00E1R1P1) and resides within the XFRM module of the system. This represents a critical security flaw that demonstrates poor input validation practices in kernel-level components. The XFRM module typically handles IP security (IPSec) functionality including encryption, authentication, and key management for network traffic. The out-of-bounds read vulnerability occurs when the module fails to properly validate input parameters during specific operations, creating a scenario where malicious code can access memory locations beyond the intended buffer boundaries.
This vulnerability operates under the Common Weakness Enumeration classification of CWE-125, which describes "Out-of-bounds Read" conditions where a program reads data past the end of a buffer. The security implications are significant as an authenticated local attacker can exploit this weakness through specific operations targeting the XFRM module. The attack requires local system access and authentication, which reduces the attack surface but does not eliminate the risk entirely. The vulnerability allows for information disclosure, meaning that an attacker could potentially extract sensitive data from system memory, including kernel memory contents, cryptographic keys, or other confidential information.
The operational impact of this vulnerability extends beyond simple information leakage, as it could enable more sophisticated attacks. An attacker with local access could potentially use the information leak to understand system memory layout, identify security mechanisms, or discover other vulnerabilities. The XFRM module's role in network security makes this particularly concerning as it could expose information about IPSec configurations, security associations, or cryptographic parameters that might be leveraged in subsequent attacks. This vulnerability aligns with ATT&CK technique T1005 for Data from Local System and T1059 for Command and Scripting Interpreter, as it provides a foothold for further exploitation.
Mitigation strategies should focus on immediate firmware updates from the vendor, which typically include parameter validation fixes and memory boundary checks. System administrators should implement least privilege principles to limit local access and monitor for unauthorized local activity. Network segmentation and monitoring solutions should be enhanced to detect potential exploitation attempts. The vulnerability also underscores the importance of secure coding practices and input validation in kernel modules. Organizations should conduct thorough security assessments of their embedded systems and implement regular patch management processes. Additionally, runtime monitoring and anomaly detection systems can help identify exploitation attempts before they result in successful information disclosure. The fix typically involves strengthening parameter validation mechanisms within the XFRM module to ensure all input data is properly bounds-checked before processing, preventing unauthorized memory access patterns that could lead to information leakage.