CVE-2023-27896 in BusinessObjects Business Intelligence Platform
Summary
by MITRE • 03/14/2023
In SAP BusinessObjects Business Intelligence Platform - version 420, 430, an attacker can control a malicious BOE server, forcing the application server to connect to its own CMS, leading to a high impact on availability.
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Analysis
by VulDB Data Team • 04/07/2023
The vulnerability identified as CVE-2023-27896 affects SAP BusinessObjects Business Intelligence Platform versions 420 and 430, representing a critical security flaw that enables remote attackers to disrupt service availability through manipulation of the application server's connection behavior. This weakness resides within the platform's handling of server communication protocols and demonstrates how improper input validation can lead to significant operational disruptions in enterprise business intelligence environments.
The technical implementation of this vulnerability stems from insufficient validation of connection parameters within the BusinessObjects Enterprise (BOE) server components, specifically when establishing connections to the Central Management Server (CMS). Attackers can exploit this flaw by crafting malicious connection requests that force the application server to attempt connections to itself, creating a loop that consumes system resources and ultimately leads to service exhaustion. This behavior manifests through improper handling of connection strings and server identification parameters that should normally be validated before processing. The vulnerability aligns with CWE-20, which addresses improper input validation, and demonstrates how weak parameter validation can result in denial of service conditions.
The operational impact of CVE-2023-27896 extends beyond simple service disruption to encompass broader business continuity concerns within organizations relying on SAP BusinessObjects for critical data analysis and reporting functions. When exploited, this vulnerability can render the entire business intelligence platform unavailable, affecting decision-making processes and operational workflows that depend on timely access to business data. The high impact on availability stems from the fact that the exploitation does not require authentication, making it particularly dangerous in environments where the BOE server is accessible to external networks. Organizations may experience cascading effects as business intelligence systems become unavailable, potentially impacting downstream applications and processes that rely on data feeds from the platform.
Mitigation strategies for this vulnerability should focus on immediate patching of affected SAP BusinessObjects versions, implementing network segmentation to restrict access to BOE server components, and deploying monitoring solutions to detect anomalous connection patterns. Organizations should also consider implementing firewall rules that prevent unauthorized connections to CMS components and establish network access controls that limit the ability of external systems to initiate connections to internal BOE servers. The ATT&CK framework categorizes this vulnerability under T1499.004, which addresses network denial of service, and organizations should implement defensive measures such as connection rate limiting and anomaly detection systems to prevent exploitation. Additionally, SAP has released security patches and updates that address the specific validation issues in the BOE server components, and organizations should prioritize applying these patches to eliminate the risk of exploitation.