CVE-2020-1832 in E6878-370
Summary
by MITRE
E6878-370 products with versions of 10.0.3.1(H557SP27C233) and 10.0.3.1(H563SP1C00) have a stack buffer overflow vulnerability. The program copies an input buffer to an output buffer without verification. An attacker in the adjacent network could send a crafted message, successful exploit could lead to stack buffer overflow which may cause malicious code execution.
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Analysis
by VulDB Data Team • 10/21/2020
The vulnerability identified as CVE-2020-1832 represents a critical stack buffer overflow flaw affecting specific versions of E6878-370 products, namely 10.0.3.1(H557SP27C233) and 10.0.3.1(H563SP1C00). This vulnerability stems from insufficient input validation during buffer copying operations, creating a fundamental security weakness that can be exploited by remote attackers within the adjacent network. The flaw resides in the product's handling of network messages where data is copied from an input buffer to an output buffer without proper bounds checking or validation mechanisms. This type of vulnerability falls under CWE-121 Stack-based Buffer Overflow, which is classified as a critical weakness in software security architectures.
The technical implementation of this vulnerability occurs when the affected product processes incoming network messages that contain crafted payloads. During normal operation, the system copies data from an untrusted input source into a fixed-size stack buffer without verifying that the input data will fit within the allocated buffer space. This unchecked buffer copy operation allows an attacker to overwrite adjacent memory locations on the stack, potentially corrupting program execution flow and control structures. The adjacent network access requirement indicates that exploitation does not necessitate direct physical access or highly privileged network positions, making it accessible to attackers who can communicate with the target device within the same network segment. The vulnerability directly maps to ATT&CK technique T1203 Exploitation for Client Execution, where attackers leverage network-based vulnerabilities to execute malicious code.
The operational impact of successful exploitation of CVE-2020-1832 can be severe and potentially catastrophic for affected systems. An attacker who successfully exploits this vulnerability could achieve arbitrary code execution on the target device, potentially gaining complete control over the affected product's operations. The stack buffer overflow could lead to application crashes, system instability, or more dangerous scenarios such as privilege escalation and persistent backdoor installation. In network infrastructure devices, this vulnerability could enable attackers to disrupt services, gain unauthorized access to network resources, or use the compromised device as a pivot point for further attacks within the network. The vulnerability affects the fundamental integrity of the product's security model, as it allows remote code execution through network-based attacks without requiring authentication or specialized attack capabilities.
Mitigation strategies for CVE-2020-1832 should focus on immediate patching of affected products to the latest available versions that contain proper buffer validation mechanisms. Organizations should implement network segmentation and access controls to limit adjacent network access to these devices, reducing the attack surface for potential exploitation. Network monitoring solutions should be deployed to detect anomalous traffic patterns that may indicate exploitation attempts, particularly unusual message formats or payloads that exceed normal operational parameters. Additionally, implementing intrusion detection systems with signature-based detection for known exploit patterns can provide early warning of attempted exploitation. Security teams should also consider disabling unnecessary network services and ports on affected devices, while maintaining regular vulnerability assessments to identify similar weaknesses in other network components. The remediation process should include comprehensive testing of patches to ensure they do not introduce compatibility issues or service disruptions in the operational environment.