CVE-2017-7310 in Sync Breeze Enterprise Client
Summary
by MITRE
A buffer overflow vulnerability in Import Command in Sync Breeze Enterprise Client 9.5.16, Disk Sorter Enterprise Client 9.5.12, and DiskBoss Enterprise Client 7.8.16 allows attackers to execute arbitrary code via a crafted XML file containing a long name attribute of a classify element.
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Analysis
by VulDB Data Team • 07/03/2024
The vulnerability identified as CVE-2017-7310 represents a critical buffer overflow flaw affecting multiple enterprise file management products including Sync Breeze Enterprise Client 9.5.16, Disk Sorter Enterprise Client 9.5.12, and DiskBoss Enterprise Client 7.8.16. This vulnerability resides within the import command functionality of these applications, specifically when processing XML files containing crafted malicious content. The flaw manifests when the software encounters a classify element with an excessively long name attribute, causing memory corruption that can be exploited to execute arbitrary code on the target system. The buffer overflow occurs due to inadequate input validation and bounds checking within the XML parsing routine, making it susceptible to exploitation by attackers who can craft malicious XML files with oversized attribute values.
The technical implementation of this vulnerability aligns with CWE-121, which describes stack-based buffer overflow conditions where insufficient bounds checking allows attackers to overwrite adjacent memory locations. The attack vector specifically targets the XML import mechanism, where the application fails to properly validate the length of the name attribute within classify elements before copying this data into fixed-size buffers. This weakness creates a predictable memory corruption scenario that can be leveraged to overwrite return addresses, function pointers, or other critical memory locations. The vulnerability demonstrates characteristics consistent with CWE-787, heap-based buffer overflow conditions, when the application's memory management fails to properly handle oversized input data during XML processing operations.
The operational impact of CVE-2017-7310 extends beyond simple code execution capabilities, as successful exploitation can lead to complete system compromise and unauthorized access to sensitive data. Attackers can leverage this vulnerability to gain elevated privileges, install persistent backdoors, or establish command and control channels without requiring user interaction beyond the initial import of a malicious XML file. The affected enterprise clients are particularly vulnerable in environments where automated file processing or batch import operations are common, as these scenarios provide ideal conditions for exploitation. Security researchers have noted that the vulnerability can be triggered through legitimate file import workflows, making it difficult to detect and prevent without proper input validation controls.
Organizations should implement multiple layers of mitigation strategies to address this vulnerability effectively. Immediate remediation involves applying vendor-provided patches and updates that correct the buffer overflow conditions in the XML parsing routines. Network segmentation and access controls should be implemented to limit exposure of affected systems to untrusted XML file sources. Input validation controls should be strengthened to enforce strict limits on attribute lengths and prevent oversized data from being processed by the import functionality. The mitigation approach aligns with ATT&CK technique T1059.007, which describes the execution of malicious code through command-line interfaces, as the vulnerability allows for arbitrary code execution that can be used to establish persistent access. Regular security assessments and penetration testing should be conducted to identify similar buffer overflow conditions in other enterprise applications, particularly those handling external data inputs. System monitoring should be enhanced to detect unusual import activities or memory access patterns that might indicate exploitation attempts.