CVE-2007-0169 in Brightstor Enterprise Backup
Summary
by MITRE
Multiple buffer overflows in Computer Associates (CA) BrightStor ARCserve Backup 9.01 through 11.5, Enterprise Backup 10.5, and CA Server/Business Protection Suite r2 allow remote attackers to execute arbitrary code via RPC requests with crafted data for opnums (1) 0x2F and (2) 0x75 in the (a) Message Engine RPC service, or opnum (3) 0xCF in the Tape Engine service.
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Analysis
by VulDB Data Team • 01/12/2025
The vulnerability identified as CVE-2007-0169 represents a critical buffer overflow issue affecting multiple versions of Computer Associates BrightStor ARCserve Backup software including versions 9.01 through 11.5, Enterprise Backup 10.5, and CA Server/Business Protection Suite r2. This flaw exists within the remote procedure call (RPC) services of the backup software, specifically targeting the Message Engine RPC service and the Tape Engine service. The vulnerability arises from insufficient input validation when processing RPC requests with specially crafted data parameters, creating opportunities for remote code execution attacks. The affected opnums 0x2F and 0x75 in the Message Engine service, along with opnum 0xCF in the Tape Engine service, serve as attack vectors that can be exploited by malicious actors to gain unauthorized system access.
The technical implementation of this vulnerability stems from improper bounds checking within the RPC processing code of the backup software. When the Message Engine RPC service receives requests with opnums 0x2F and 0x75, or when the Tape Engine service processes requests with opnum 0xCF, the software fails to adequately validate the size and content of incoming data structures. This lack of input sanitization allows attackers to overflow buffer boundaries and potentially overwrite critical memory locations including return addresses and function pointers. The buffer overflow conditions occur during the parsing of RPC request parameters, where the software assumes fixed-size buffers without proper validation of dynamic input data lengths. This vulnerability directly maps to CWE-121, which describes stack-based buffer overflow conditions, and CWE-122, which addresses heap-based buffer overflow scenarios that can occur in similar RPC implementations.
The operational impact of CVE-2007-0169 extends beyond simple remote code execution to encompass complete system compromise and data exfiltration capabilities. Attackers exploiting this vulnerability can gain arbitrary code execution privileges on the affected backup server, potentially leading to unauthorized access to backup data, system enumeration, privilege escalation, and lateral movement within the network. The remote nature of the attack means that adversaries can exploit these vulnerabilities from outside the network perimeter without requiring local system access or authentication credentials. Organizations running affected versions of CA BrightStor Backup software face significant risk of data breaches, system downtime, and potential regulatory compliance violations. The vulnerability affects critical backup infrastructure, making it particularly attractive to attackers who seek to disrupt business continuity operations or gain persistent access to enterprise environments through compromised backup systems.
Mitigation strategies for CVE-2007-0169 should prioritize immediate software updates and patches from Computer Associates, as the vendor would have released specific fixes addressing the buffer overflow conditions in the RPC services. Network segmentation and firewall restrictions should be implemented to limit access to the affected RPC ports and services, particularly blocking external access to the backup server infrastructure. Access controls should be strengthened through the implementation of authentication mechanisms and privilege separation to minimize the impact of potential exploitation. Security monitoring should include detection of anomalous RPC traffic patterns and unusual network connections to the backup services. The vulnerability demonstrates the importance of following secure coding practices such as those recommended by the OWASP Secure Coding Practices and aligns with ATT&CK technique T1059.007 for remote code execution through RPC services. Organizations should also conduct thorough vulnerability assessments to identify other potentially affected systems and ensure proper patch management processes are in place to prevent similar vulnerabilities from occurring in the future.