CVE-2022-22532 in NetWeaver Application Server Java
Summary
by MITRE • 02/10/2022
In SAP NetWeaver Application Server Java - versions KRNL64NUC 7.22, 7.22EXT, 7.49, KRNL64UC, 7.22, 7.22EXT, 7.49, 7.53, KERNEL 7.22, 7.49, 7.53, an unauthenticated attacker could submit a crafted HTTP server request which triggers improper shared memory buffer handling. This could allow the malicious payload to be executed and hence execute functions that could be impersonating the victim or even steal the victim's logon session.
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Analysis
by VulDB Data Team • 02/13/2022
The vulnerability identified as CVE-2022-22532 affects SAP NetWeaver Application Server Java installations across multiple version lines including KRNL64NUC 7.22, 7.22EXT, 7.49, KRNL64UC 7.22, 7.22EXT, 7.49, 7.53, and KERNEL 7.22, 7.49, 7.53. This security flaw represents a critical weakness in the application server's handling of HTTP requests and memory management processes. The vulnerability stems from improper shared memory buffer handling mechanisms that occur when processing incoming HTTP server requests. The flaw exists within the kernel components of SAP NetWeaver and specifically impacts how the system manages memory buffers during request processing, creating an exploitable condition that can be leveraged by unauthenticated attackers. The vulnerability is particularly concerning because it operates without requiring authentication credentials, making it accessible to any external party capable of sending crafted HTTP requests to the affected system.
The technical implementation of this vulnerability involves a buffer handling flaw that allows attackers to craft malicious HTTP requests designed to trigger memory corruption or manipulation within the shared memory segments used by the SAP NetWeaver application server. When these crafted requests are processed, the improper buffer handling causes the system to execute arbitrary code within the context of the running application server process. This execution capability enables attackers to perform operations that would normally require legitimate authentication or authorization, effectively allowing them to impersonate legitimate users or steal active session tokens. The vulnerability's impact extends beyond simple code execution as it can lead to complete session hijacking, where attackers can assume the identity of authenticated users and access sensitive data or perform privileged operations within the SAP environment. This type of flaw falls under CWE-129, which addresses improper handling of memory buffers, and aligns with ATT&CK technique T1078.004 for valid accounts and T1566.001 for spearphishing via email, as the exploitation can lead to session theft and credential compromise.
The operational impact of CVE-2022-22532 is severe for organizations running affected SAP NetWeaver systems, as it creates a pathway for unauthorized access to critical business applications and data repositories. Attackers exploiting this vulnerability can potentially gain access to sensitive enterprise information, manipulate business processes, and perform actions that could result in financial loss, regulatory violations, and reputational damage. The unauthenticated nature of the exploit means that organizations cannot rely on network-level access controls to prevent exploitation, as the vulnerability can be triggered from any external network location. Organizations must also consider the potential for lateral movement within their network infrastructure, as compromised SAP systems often serve as access points to other enterprise systems. The vulnerability affects the core kernel components of SAP NetWeaver, which means that successful exploitation could provide attackers with broad access to the underlying application server functionality and potentially compromise the entire SAP landscape. This makes the vulnerability particularly dangerous in enterprise environments where SAP systems often integrate with other critical business applications and databases, creating a potential attack surface that extends far beyond the immediate SAP environment.
Organizations should implement immediate mitigations including applying the relevant SAP security notes and patches that address the shared memory buffer handling issues within the SAP NetWeaver kernel components. Network segmentation and firewall rules should be implemented to restrict access to SAP NetWeaver application servers to only trusted sources and necessary business applications. Additionally, organizations should conduct comprehensive network monitoring to detect anomalous HTTP request patterns that might indicate exploitation attempts. The implementation of web application firewalls and intrusion detection systems can help identify and block malicious HTTP requests designed to exploit this vulnerability. Regular security assessments and vulnerability scanning should be performed to ensure that all SAP NetWeaver installations are properly patched and configured. Organizations should also review and strengthen their session management practices, including implementing secure session token handling and monitoring for suspicious session activity. The vulnerability's classification under CWE-129 and its alignment with ATT&CK techniques for privilege escalation and credential theft emphasize the need for comprehensive security measures that address both the immediate technical flaw and broader security posture improvements. Given the critical nature of SAP systems in enterprise environments, organizations should also consider implementing additional security controls such as privileged access management solutions and enhanced monitoring of SAP-specific activities to detect potential exploitation attempts.