CVE-2022-2103 in SEPCOS
Summary
by MITRE • 06/24/2022
An attacker with weak credentials could access the TCP port via an open FTP port, allowing an attacker to read sensitive files and write to remotely executable directories.
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Analysis
by VulDB Data Team • 07/15/2022
The vulnerability identified as CVE-2022-2103 represents a critical security flaw in FTP server implementations that allows unauthorized access through weak authentication mechanisms. This weakness stems from insufficient credential validation processes that permit attackers to establish FTP connections using easily guessable or previously compromised credentials. The vulnerability specifically affects TCP port access through open FTP services, creating a direct pathway for malicious actors to exploit the system's file access controls. The flaw enables attackers to perform both read and write operations on remote directories, potentially compromising the entire system's integrity and confidentiality.
The technical implementation of this vulnerability resides in the authentication and authorization mechanisms of the FTP service. When weak credentials are used, the system fails to properly validate user identities, allowing unauthorized access to the file transfer protocol interface. This weakness creates a direct attack vector that aligns with CWE-305 authentication flaws, where the authentication process itself is compromised due to weak credential management. The vulnerability operates at the network layer, specifically targeting TCP port 21 which is the standard port for FTP services, making it easily discoverable and exploitable by automated scanning tools.
From an operational impact perspective, the vulnerability presents significant risks to organizations as it allows attackers to access sensitive files and write to executable directories. This dual capability enables attackers to not only exfiltrate confidential data but also to deploy malicious code remotely, potentially leading to complete system compromise. The ability to write to executable directories creates opportunities for privilege escalation and persistent access, as attackers can place malicious files that will be executed by the system. This vulnerability directly impacts the CIA triad by compromising confidentiality through data access, integrity through unauthorized modifications, and availability through potential system disruption.
The exploitation of CVE-2022-2103 aligns with several ATT&CK tactics including initial access through valid accounts and privilege escalation through file permissions. Attackers can leverage this vulnerability to establish a foothold in the network and subsequently move laterally to other systems. The vulnerability also maps to ATT&CK technique T1190 for exploitation of remote services, where attackers use weak credentials to gain access to network services. Organizations should implement robust credential policies, including strong password requirements and multi-factor authentication, to mitigate this risk. Network segmentation and firewall rules should be configured to restrict access to FTP services, while regular credential audits and monitoring of FTP access logs can help detect suspicious activities. Additionally, implementing intrusion detection systems and configuring proper access controls on file directories can significantly reduce the impact of such vulnerabilities.
The root cause of this vulnerability demonstrates a failure in proper access control implementation, specifically in credential validation and authorization processes. This weakness creates an attack surface that can be easily exploited by threat actors who may use credential stuffing or brute force attacks to gain access. The vulnerability also highlights the importance of following security best practices such as the principle of least privilege, where users should only have access to resources necessary for their specific functions. Organizations must also consider implementing automated tools that can detect and alert on weak credentials being used to access critical services, as this vulnerability can be exploited through both automated scanning and targeted attacks. The remediation process should include immediate credential rotation for all affected systems, implementation of stronger authentication mechanisms, and comprehensive security assessments to identify similar vulnerabilities across the network infrastructure.