CVE-2015-4069 in UDP
Summary
by MITRE
The EdgeServiceImpl web service in Arcserve UDP before 5.0 Update 4 allows remote attackers to obtain sensitive credentials via a crafted SOAP request to the (1) getBackupPolicy or (2) getBackupPolicies method.
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Analysis
by VulDB Data Team • 04/02/2019
The vulnerability identified as CVE-2015-4069 represents a critical security flaw in Arcserve UDP's EdgeServiceImpl web service component. This issue affects versions prior to 5.0 Update 4 and stems from improper input validation within the SOAP request handling mechanism. The vulnerability specifically targets two methods within the service interface: getBackupPolicy and getBackupPolicies, which are designed to retrieve backup policy configurations from the system. Attackers can exploit this weakness by crafting malicious SOAP requests that manipulate the service's response handling to extract sensitive authentication credentials stored within the backup configuration system.
The technical exploitation of this vulnerability follows a pattern consistent with SOAP-based injection attacks and demonstrates a classic lack of proper access control and credential sanitization. When the EdgeServiceImpl web service processes these crafted requests, it fails to properly validate the incoming SOAP parameters and does not implement adequate authorization checks before returning sensitive policy information. This flaw essentially allows unauthenticated or low-privileged attackers to bypass normal access controls and retrieve backup policy details that may contain credential information, including usernames, passwords, or other authentication tokens required for backup operations. The vulnerability maps to CWE-20, which describes improper input validation, and CWE-502, which covers deserialization of untrusted data, as the service likely processes serialized policy objects without proper validation.
The operational impact of this vulnerability extends beyond simple credential theft, as it can enable attackers to gain comprehensive understanding of the backup infrastructure configuration. Once credentials are obtained, attackers can potentially escalate their privileges within the backup environment, access restricted backup data, or even manipulate backup policies to create persistent access points. This vulnerability particularly affects organizations relying on Arcserve UDP for enterprise backup management, where backup policies often contain critical authentication information for various backup targets including databases, file systems, and network devices. The attack vector is particularly concerning as it requires minimal privileges to exploit and can be executed remotely without requiring physical access to the system.
Organizations should prioritize immediate remediation by applying Arcserve UDP version 5.0 Update 4 or later, which includes proper input validation and access control measures for the affected methods. Additionally, network segmentation should be implemented to limit access to the EdgeServiceImpl web service, and firewall rules should be configured to restrict SOAP request access to trusted administrative networks only. Security monitoring should be enhanced to detect unusual patterns in backup policy retrieval requests, and regular security audits should verify that no unauthorized access has occurred. This vulnerability aligns with ATT&CK technique T1555.003 for credentials from password stores and T1078.004 for valid accounts, as it allows adversaries to obtain legitimate credentials that can be used for further system compromise. The remediation process should include comprehensive testing to ensure that the patch does not disrupt legitimate backup operations while effectively closing the credential exposure channel.