CVE-2023-28382 in REC Agent Server Edition
Summary
by MITRE • 05/26/2023
Directory traversal vulnerability in ESS REC Agent Server Edition series allows an authenticated attacker to view or alter an arbitrary file on the server. Affected products and versions are as follows: ESS REC Agent Server Edition for Linux V1.0.0 to V1.4.3, ESS REC Agent Server Edition for Solaris V1.1.0 to V1.4.0, ESS REC Agent Server Edition for HP-UX V1.1.0 to V1.4.0, and ESS REC Agent Server Edition for AIX V1.2.0 to V1.4.1
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Analysis
by VulDB Data Team • 12/06/2025
The CVE-2023-28382 vulnerability represents a critical directory traversal flaw within the ESS REC Agent Server Edition across multiple operating systems including Linux, Solaris, HP-UX, and AIX. This vulnerability stems from inadequate input validation mechanisms that fail to properly sanitize user-supplied paths before processing file operations. The flaw allows authenticated attackers who have legitimate access to the system to exploit this weakness and gain unauthorized access to arbitrary files on the server. The vulnerability is particularly concerning as it affects multiple platform variants of the same software product, indicating a systemic design flaw rather than an isolated issue. According to CWE classification, this vulnerability maps to CWE-22: Improper Limiting of a Pathname to a Restricted Directory, which is a well-documented weakness in software security architecture. The ATT&CK framework categorizes this as a privilege escalation technique under the T1078 category, as it leverages existing authenticated sessions to expand access privileges.
The technical implementation of this vulnerability occurs when the ESS REC Agent Server processes file requests from authenticated users without properly validating the input parameters that specify file paths. Attackers can manipulate these parameters to traverse directory structures and access files outside of the intended directory boundaries. This typically involves using sequences such as "../" or similar path manipulation techniques to navigate upward in the directory hierarchy. The affected versions span multiple releases across different operating systems, suggesting that the vulnerability was introduced early in the product lifecycle and persisted through several updates. The authentication requirement means that this vulnerability cannot be exploited by anonymous attackers but poses significant risk to systems where legitimate users have access to the agent server functionality.
The operational impact of this vulnerability extends beyond simple information disclosure to encompass potential system compromise and data integrity violations. An attacker with directory traversal capabilities could access sensitive configuration files, log files, system binaries, or other critical components that might contain credentials, system information, or other valuable data. The ability to alter arbitrary files introduces additional risks including potential code injection, system corruption, or privilege escalation opportunities. Organizations running these affected versions face significant exposure, particularly in environments where the agent server handles sensitive data or provides administrative functions. The vulnerability affects server-side operations that typically require elevated privileges, making the potential impact more severe than typical client-side traversal issues.
Mitigation strategies for CVE-2023-28382 should prioritize immediate patch deployment from the vendor, as this represents a critical security flaw that requires urgent attention. Organizations should implement network segmentation to limit access to the affected agent servers and reduce the attack surface. Input validation controls should be strengthened at the application level to prevent path manipulation attacks, including implementing whitelist-based validation for file operations. Access controls should be reviewed to ensure that only authorized personnel have access to the agent server functionality. System monitoring should be enhanced to detect anomalous file access patterns that might indicate exploitation attempts. Additionally, regular security assessments should be conducted to identify similar vulnerabilities in other components of the system architecture. The remediation process should include comprehensive testing to ensure that patches do not introduce regressions in system functionality while effectively addressing the directory traversal vulnerability. Organizations should also consider implementing automated vulnerability scanning tools that can detect similar path traversal weaknesses in their broader software ecosystem.