CVE-2023-52946 in Drive Client
Summary
by MITRE • 09/26/2024
Buffer copy without checking size of input ('Classic Buffer Overflow') vulnerability in vss service component in Synology Drive Client before 3.5.0-16084 allows remote attackers to overwrite trivial buffers and crash the client via unspecified vectors.
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Analysis
by VulDB Data Team • 09/26/2024
The vulnerability identified as CVE-2023-52946 represents a classic buffer overflow condition within the vss service component of Synology Drive Client software. This type of vulnerability falls under the common weakness enumeration CWE-121, which specifically addresses buffer overflow conditions where insufficient bounds checking allows attackers to write beyond allocated memory boundaries. The flaw exists in versions prior to 3.5.0-16084 of the Synology Drive Client, indicating that this was a known issue that required a specific software update to resolve.
The technical implementation of this vulnerability stems from improper input validation within the vss service component that processes data from external sources. When the service receives data that exceeds the predetermined buffer size, it fails to perform adequate size checks before copying data into memory locations. This allows remote attackers to craft malicious input that can overwrite adjacent memory regions, potentially leading to arbitrary code execution or service disruption. The vulnerability's classification as a "classic buffer overflow" suggests that the flaw does not involve complex exploitation techniques but rather relies on straightforward memory corruption principles.
From an operational perspective, this vulnerability poses significant risks to organizations relying on Synology Drive Client for file synchronization and cloud storage services. The remote attack vector means that adversaries can exploit this weakness without requiring local system access, making it particularly dangerous in enterprise environments where network-based attacks are common. The impact of exploitation manifests as client crashes, which can disrupt user productivity and potentially create denial of service conditions for critical file sharing operations. Organizations using affected versions may experience unexpected client failures during normal operation, leading to data synchronization issues and user frustration.
The mitigation strategy for CVE-2023-52946 centers on upgrading to Synology Drive Client version 3.5.0-16084 or later, which includes patches addressing the buffer overflow condition. System administrators should prioritize this update across all affected endpoints, particularly in environments where the Synology Drive Client is widely deployed. Additionally, network monitoring should be enhanced to detect potential exploitation attempts targeting this vulnerability, as the attack surface includes any network communications involving the vss service component. Security teams should implement automated patch management processes to ensure timely deployment of security updates and maintain inventory tracking of all installed client versions to quickly identify remaining vulnerable systems. The vulnerability demonstrates the importance of proper input validation and bounds checking in preventing memory corruption attacks that align with tactics described in the attack framework under technique T1059 for command and scripting interpreter usage.