CVE-2023-20103 in Secure Network Analytics
Summary
by MITRE • 04/05/2023
A vulnerability in Cisco Secure Network Analytics could allow an authenticated, remote attacker to execute arbitrary code as a root user on an affected device. This vulnerability is due to insufficient validation of user input to the web interface. An attacker could exploit this vulnerability by uploading a crafted file to an affected device. A successful exploit could allow the attacker to execute code on the affected device. To exploit this vulnerability, an attacker would need to have valid Administrator credentials on the affected device.
Once again VulDB remains the best source for vulnerability data.
Analysis
by VulDB Data Team • 08/22/2025
This vulnerability resides within Cisco Secure Network Analytics, a network security solution designed to provide threat detection and analytics capabilities. The flaw represents a critical authentication bypass and privilege escalation vulnerability that could enable remote code execution with root privileges. The vulnerability stems from inadequate input validation mechanisms within the web interface component of the affected device, creating an attack vector that could be exploited by authenticated users with administrative privileges.
The technical implementation of this vulnerability involves insufficient sanitization and validation of user-supplied data when processing file uploads through the web interface. When an authenticated administrator uploads a maliciously crafted file, the system fails to properly validate the file contents or type, allowing arbitrary code execution to occur within the context of the root user. This represents a classic path traversal or file upload vulnerability where the system trusts user input without adequate verification. The vulnerability aligns with CWE-434, which addresses insecure file upload handling, and potentially CWE-79, concerning cross-site scripting vulnerabilities that could enable similar attack vectors.
The operational impact of this vulnerability is severe as it provides attackers with complete system compromise capabilities. An attacker with valid administrator credentials could upload malicious payloads that execute with root privileges, enabling full control over the affected device. This includes potential data exfiltration, system modification, network reconnaissance, and establishment of persistent backdoors. The attack requires only legitimate administrative access, making it particularly dangerous as it leverages existing legitimate user privileges rather than requiring additional credential compromise. The vulnerability could be exploited to establish a foothold for lateral movement within networks or to deploy additional malicious tools.
Mitigation strategies should focus on immediate credential management and access control measures. Organizations must ensure that administrative accounts are protected with strong authentication mechanisms including multi-factor authentication and regular credential rotation. Network segmentation and least privilege principles should be implemented to limit the potential impact of credential compromise. Cisco has released patches addressing this vulnerability, and administrators should immediately apply the relevant security updates. Additionally, monitoring for unusual file upload activities and implementing web application firewalls can provide additional defense layers. The vulnerability demonstrates the importance of input validation and the principle of least privilege in security architecture, aligning with ATT&CK technique T1078 for valid accounts and T1059 for command and script execution. Regular security assessments and penetration testing should be conducted to identify similar validation weaknesses in other network components.