CVE-2022-49039 in Drive Client
Summary
by MITRE • 09/26/2024
Out-of-bounds write vulnerability in backup task management functionality in Synology Drive Client before 3.4.0-15721 allows local users with administrator privileges to execute arbitrary commands via unspecified vectors.
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Analysis
by VulDB Data Team • 09/26/2024
The vulnerability identified as CVE-2022-49039 represents a critical out-of-bounds write flaw within the backup task management functionality of Synology Drive Client software. This issue affects versions prior to 3.4.0-15721 and specifically targets local users who possess administrator privileges. The vulnerability manifests in the client-side backup processing mechanisms where improper input validation and memory management lead to buffer overflow conditions. Attackers with administrative access can exploit this weakness to inject malicious code into the system's memory space, potentially leading to complete system compromise. The flaw exists within the client-side application logic that handles backup task configurations and execution sequences, creating an avenue for privilege escalation and arbitrary code execution.
The technical nature of this vulnerability aligns with CWE-787, which describes out-of-bounds write conditions where an attacker can write data past the end of allocated buffer space. This particular implementation flaw occurs during the processing of backup task management operations where the application fails to properly validate the size and content of user-supplied parameters. The backup task management functionality in Synology Drive Client likely processes configuration files or command-line arguments that are not adequately sanitized before being used in memory operations. When legitimate administrative users configure backup tasks through the client interface, malicious inputs can trigger buffer overflow conditions that allow for memory corruption and subsequent code execution.
From an operational perspective, this vulnerability presents significant risk to organizations relying on Synology Drive Client for file synchronization and backup operations. The requirement for administrator privileges limits the attack surface compared to user-level exploits, but it still represents a serious threat since privileged accounts are often targeted by attackers seeking persistent access to systems. The impact extends beyond simple code execution as the vulnerability can be leveraged to establish backdoors, escalate privileges further, or manipulate backup data to facilitate data exfiltration. The attack vector involves legitimate administrative activities within the backup management interface, making detection more challenging as the malicious behavior appears to be normal administrative operations. Organizations using Synology Drive Client for backup operations face potential data loss, system compromise, and unauthorized access to sensitive information stored in their backup repositories.
Mitigation strategies for CVE-2022-49039 should prioritize immediate software updates to version 3.4.0-15721 or later, which contains the necessary patches addressing the buffer overflow conditions. System administrators should implement least privilege principles by limiting administrative access to only essential personnel and regularly auditing administrative account usage. Network monitoring should be enhanced to detect unusual backup task configurations or execution patterns that might indicate exploitation attempts. The principle of defense in depth suggests implementing additional security controls such as application whitelisting to restrict execution of unauthorized code and regular security assessments of backup configurations. Organizations should also consider implementing automated patch management systems to ensure timely deployment of security updates across all client installations. From an ATT&CK framework perspective, this vulnerability maps to techniques involving privilege escalation and persistence through legitimate administrative tools, requiring security teams to monitor for suspicious administrative activities and maintain robust incident response procedures for potential exploitation scenarios.