CVE-2023-40308 in CommonCryptoLib
Summary
by MITRE • 09/12/2023
SAP CommonCryptoLib allows an unauthenticated attacker to craft a request, which when submitted to an open port causes a memory corruption error in a library which in turn causes the target component to crash making it unavailable. There is no ability to view or modify any information.
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Analysis
by VulDB Data Team • 09/26/2024
SAP CommonCryptoLib represents a critical security vulnerability classified as CVE-2023-40308 that exposes systems to denial of service attacks through memory corruption exploits. This vulnerability exists within SAP's cryptographic library implementation and specifically targets components that utilize the CommonCryptoLib for security operations. The flaw manifests when an unauthenticated attacker crafts malicious requests that can be submitted to open network ports where SAP services are accessible. The technical execution involves sending specially constructed data packets that trigger memory corruption within the affected library, causing the targeted component to experience a crash and subsequent unavailability. This vulnerability directly aligns with CWE-121, which addresses stack-based buffer overflow conditions, and CWE-122, which covers heap-based buffer overflow scenarios, both of which represent fundamental memory corruption weaknesses that can lead to system instability. The attack vector operates through network-based communication channels where SAP services expose open ports, making them susceptible to exploitation by adversaries who do not require authentication credentials to initiate the attack. According to ATT&CK framework, this vulnerability maps to T1499.004 which covers network denial of service attacks and T1566.001 which involves phishing through spearphishing campaigns that could potentially leverage such vulnerabilities to compromise system availability. The operational impact of this vulnerability extends beyond simple service disruption as it can affect critical business processes that depend on SAP systems for enterprise resource planning and other mission-critical functions. When the target component crashes due to memory corruption, it results in immediate unavailability of the affected service, potentially causing cascading failures throughout the enterprise infrastructure. The absence of any data viewing or modification capabilities means that while the attack does not directly result in data breaches or unauthorized access, the availability impact can still severely compromise business operations and potentially enable further attacks through service disruption. Organizations utilizing SAP systems must understand that this vulnerability can be exploited by threat actors to create service outages that may interfere with business continuity planning and disaster recovery procedures. The memory corruption error occurs at the library level rather than at the application level, making it particularly dangerous as it can affect multiple SAP components that rely on the CommonCryptoLib for cryptographic operations. This vulnerability represents a significant concern for organizations operating SAP environments in production, especially those with exposed services on public networks or those without proper network segmentation controls in place. The lack of authentication requirements for exploitation makes this vulnerability particularly dangerous as it can be triggered by any attacker with network access to the target system, regardless of their authorization status or credentials. Security teams should consider implementing network access controls and monitoring for unusual traffic patterns that may indicate exploitation attempts against this vulnerability. The vulnerability's potential for causing widespread service disruption underscores the importance of immediate remediation through official SAP patches and updates, while also implementing temporary network-level mitigations to prevent exploitation until permanent fixes are deployed. Organizations should also review their incident response procedures to ensure they can quickly detect and respond to service disruptions that may result from this memory corruption vulnerability.