CVE-2008-4397 in Business Protection Suite
Summary
by MITRE
Directory traversal vulnerability in the RPC interface (asdbapi.dll) in CA ARCserve Backup (formerly BrightStor ARCserve Backup) r11.1 through r12.0 allows remote attackers to execute arbitrary commands via a .. (dot dot) in an RPC call with opnum 0x10A.
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Analysis
by VulDB Data Team • 08/18/2019
The vulnerability identified as CVE-2008-4397 represents a critical directory traversal flaw within the remote procedure call interface of CA ARCserve Backup software versions 11.1 through 12.0. This issue specifically affects the asdbapi.dll component that handles RPC communications, creating a pathway for remote attackers to escalate privileges and execute arbitrary code on affected systems. The vulnerability manifests when an attacker crafts a malicious RPC call with opnum 0x10A that includes directory traversal sequences using the .. (dot dot) notation, allowing unauthorized access to restricted file system locations. The flaw stems from inadequate input validation within the RPC interface implementation, where user-supplied parameters are not properly sanitized before being processed by the underlying file system operations. This directory traversal vulnerability directly maps to CWE-22, which categorizes improper limitation of a pathname to a restricted directory, commonly known as path traversal or directory traversal attacks.
The operational impact of this vulnerability extends beyond simple unauthorized file access, as it enables attackers to execute arbitrary commands on the target system with the privileges of the affected service account. Since CA ARCserve Backup typically runs with elevated privileges to perform backup operations, successful exploitation could lead to complete system compromise. Attackers could leverage this vulnerability to read sensitive configuration files, modify backup policies, access backed-up data, or even install malware on the system. The RPC interface serves as a critical communication channel for backup operations, making this vulnerability particularly dangerous as it could be exploited from remote locations without requiring local access to the system. The vulnerability's exploitation requires knowledge of the specific opnum 0x10A and the precise construction of directory traversal sequences, making it somewhat sophisticated but still within reach of determined attackers who have basic knowledge of the software's RPC interface structure.
Security professionals should recognize this vulnerability as a prime example of how legacy backup software implementations often contain unpatched security flaws that persist across multiple versions. The attack vector demonstrates the importance of proper input validation in network-facing services, particularly those handling file system operations. Organizations using affected versions of CA ARCserve Backup should immediately implement network segmentation to limit access to the RPC interfaces, disable unnecessary RPC services, and apply the vendor-provided security patches. The vulnerability also highlights the need for regular security assessments of backup infrastructure, as these systems often contain sensitive data and operate with elevated privileges, making them attractive targets for attackers. From an ATT&CK framework perspective, this vulnerability maps to techniques involving privilege escalation and command execution, specifically targeting the system through remote access points. The remediation approach should include immediate patching, network access controls, and monitoring for suspicious RPC activity patterns that might indicate exploitation attempts.