CVE-2020-9105 in Taurus-AN00B
Summary
by MITRE • 10/11/2020
Taurus-AN00B versions earlier than 10.1.0.156(C00E155R7P2) have an insufficient input validation vulnerability. Due to the input validation logic is incorrect, an attacker can exploit this vulnerability to access and modify the memory of the device by doing a series of operations. Successful exploit may cause the service abnormal.
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Analysis
by VulDB Data Team • 11/18/2020
The vulnerability identified as CVE-2020-9105 affects Taurus-AN00B network devices running firmware versions prior to 10.1.0.156(C00E155R7P2). This represents a critical security flaw that stems from inadequate input validation mechanisms within the device's software architecture. The vulnerability resides in the device's handling of user-supplied data, where the validation logic fails to properly sanitize or verify input parameters before processing. Such insufficient validation creates a pathway for malicious actors to manipulate system memory through carefully constructed sequences of operations that exploit the flawed validation routines. The affected device operates at the network infrastructure level, making it particularly dangerous as it could serve as an entry point for broader network compromise.
The technical exploitation of this vulnerability involves an attacker constructing specific input sequences that bypass the device's validation checks. When the device processes these malformed inputs, the incorrect validation logic allows unauthorized memory access and modification operations to occur. This memory manipulation capability enables attackers to alter critical system components, potentially leading to complete device compromise or service disruption. The vulnerability's impact extends beyond simple data corruption as it provides attackers with the ability to manipulate the device's operational state, potentially enabling persistent access or denial-of-service conditions. The attack vector typically involves sending specially crafted network requests or commands that trigger the memory access patterns, leveraging the flawed validation logic as a gateway to system exploitation.
From an operational perspective, this vulnerability presents significant risks to network infrastructure security, particularly in environments where Taurus-AN00B devices serve as critical network components. The potential for service abnormality encompasses both immediate operational disruption and longer-term security degradation, as successful exploitation could allow attackers to maintain persistent access to the compromised device. The vulnerability aligns with CWE-20, which specifically addresses "Improper Input Validation" in software security contexts, and demonstrates how inadequate validation can lead to memory corruption and unauthorized system access. Network administrators face the challenge of identifying affected devices within their infrastructure and implementing timely remediation measures to prevent exploitation. The attack surface is particularly concerning given that the vulnerability affects network infrastructure devices that may be difficult to patch or replace, potentially leaving organizations exposed for extended periods.
Organizations should prioritize immediate firmware updates to version 10.1.0.156(C00E155R7P2) or later to address this vulnerability. The remediation process requires careful planning due to the network infrastructure nature of the affected devices, including scheduling maintenance windows and verifying compatibility with existing network configurations. Network segmentation and monitoring should be enhanced to detect potential exploitation attempts, while access controls should be strengthened to limit potential attack vectors. The vulnerability also highlights the importance of implementing proper input validation mechanisms in network device firmware development, aligning with security best practices from the ATT&CK framework's defense evasion and privilege escalation categories. Organizations should conduct thorough vulnerability assessments to identify all instances of affected devices within their network infrastructure and develop incident response procedures specifically addressing memory corruption vulnerabilities in network equipment.