CVE-2008-4339 in NetBackup Server
Summary
by MITRE
Unspecified vulnerability in the Java Administration GUI (jnbSA) in Symantec Veritas NetBackup Server and NetBackup Enterprise Server 5.1 before MP7, 6.0 before MP7, and 6.5 before 6.5.2 allows remote authenticated users to gain privileges via unknown attack vectors related to "bpjava* binaries."
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Analysis
by VulDB Data Team • 08/17/2019
The vulnerability described in CVE-2008-4339 represents a critical privilege escalation issue within Symantec Veritas NetBackup's Java Administration GUI component known as jnbSA. This flaw exists in multiple versions of the NetBackup Server and Enterprise Server platforms, specifically affecting versions 5.1 prior to MP7, 6.0 prior to MP7, and 6.5 prior to 6.5.2. The vulnerability operates within the Java-based administrative interface that administrators use to manage backup operations, making it a significant concern for organizations relying on these backup solutions for critical data protection. The unspecified nature of the attack vectors suggests that the vulnerability could be exploited through multiple pathways, potentially including malformed input processing, improper access controls, or insecure code execution within the bpjava* binaries that form part of the NetBackup Java runtime environment.
The technical flaw manifests in the insufficient privilege management and access control mechanisms within the jnbSA component's handling of bpjava binaries. These binaries are core components of the NetBackup Java application that provide administrative functionality through the GUI interface. When authenticated users interact with the administration GUI, the system should enforce strict privilege boundaries to prevent unauthorized escalation of privileges. However, the vulnerability allows authenticated users to bypass these security controls and elevate their privileges to higher administrative levels or gain access to restricted system resources. The attack vectors likely involve manipulation of the Java execution environment or exploitation of insecure deserialization processes within the bpjava binaries that handle user input and administrative commands. This type of vulnerability falls under the CWE-276 category of insecure default permissions and potentially CWE-787 out-of-bounds write conditions that could be exploited to manipulate execution flow.
The operational impact of this vulnerability is severe for organizations using affected Symantec NetBackup versions, as it enables authenticated attackers to gain elevated privileges that could allow them to perform unauthorized administrative actions. Attackers could potentially access sensitive backup data, modify backup policies, disable backup operations, or even gain system-level access to the underlying backup server. The remote nature of the attack means that authenticated users with legitimate access to the administration GUI could exploit this vulnerability to escalate their privileges without requiring physical access or additional authentication mechanisms. This creates a significant risk for organizations where administrative credentials might be compromised through social engineering, credential theft, or other attack vectors. The vulnerability particularly affects enterprise backup environments where the NetBackup server acts as a central management point for backup operations across multiple systems and storage devices.
Organizations should implement immediate mitigations including applying the vendor-supplied patches and updates for Symantec Veritas NetBackup versions affected by this vulnerability. The recommended approach involves upgrading to NetBackup 5.1 MP7, 6.0 MP7, or 6.5.2 and later versions where the privilege escalation issues have been addressed. Network segmentation should be implemented to limit access to the administration GUI to only authorized personnel, and additional authentication controls such as multi-factor authentication should be considered for administrative access. Monitoring and logging of administrative activities should be enhanced to detect any unusual privilege escalation attempts. The vulnerability aligns with ATT&CK technique T1068 which covers privilege escalation through local exploitation and may also relate to T1548.001 for abuse of application permissions and T1078 for valid accounts usage. Organizations should also consider implementing network-based intrusion detection systems to monitor for potential exploitation attempts targeting the specific bpjava* binaries and administration GUI components. Regular security assessments of backup infrastructure should be conducted to identify and remediate similar vulnerabilities in other enterprise backup solutions and related systems.