CVE-2023-21839 Scanner

Oracle WebLogic Server is a JAVA EE application server currently developed by Oracle Corporation. It is used by businesses and organizations to run distributed enterprise applications, catering to various industries, such as telecommunications, financial services, and government institutions. WebLogic Server provides capabilities such as support for model-driven development, robust adaptability to load demands, and enhanced component integration. The product plays a vital role in the middleware stack, offering seamless communication between front-end and backend systems. It is designed to be highly scalable and available, making it an integral part of enterprise enterprise resource planning (ERP) and customer relationship management (CRM) applications. Its diverse application and scalability make it a critical component in an organization's IT infrastructure.

The vulnerability detected in the Oracle WebLogic Server allows unauthorized access to critical data by exploiting provided network access. Unauthorized Admin Access, if executed successfully, bypasses authorized controls meant to safeguard sensitive data within the platform, making this vulnerability highly critical. Exploitability is relatively easy as it requires no prior authentication or user interaction. The CVSS score of 7.5 indicates that confidentiality can be significantly impacted while maintaining integrity and availability intact. Oracle has identified several versions of WebLogic that are susceptible to this unauthorized access threat. Overall, the vulnerability poses a serious risk to data security within affected deployments.

The technical details of the vulnerability involve unauthorized access. The vulnerable endpoint typically is the T3 or IIOP service, widely utilized by WebLogic Server for internal operations. When exploited, the loophole allows attackers to perform unauthorized activities, potentially resulting in data leaks. The parameter-based flaw does not necessitate authenticated sessions, thus exposing the server's core functionalities to potential external tampering. Utilizing a network-based approach, attackers can initiate illicit connections over the server's designated ports, ultimately breaching security protocols. This vulnerability is considered a severe threat due to its potential for unauthorized data exposure.

The possible effects of exploiting this vulnerability include unauthorized access to sensitive data stored on the WebLogic Server, leading to data breaches and potential information theft. Attackers might gain complete access to all data accessible via the Oracle WebLogic Server, making it possible to compromise accounts and misuse administrative privileges. Systems' configuration integrity and confidentiality of organizational data could be at risk, leading to reputational damage and potential regulatory non-compliance. Extended exposure to this vulnerability could facilitate lateral movement within the network, giving malicious actors further entry points for broader attacks.

REFERENCES

• https://github.com/vulhub/vulhub/tree/master/weblogic/CVE-2023-21839
• https://github.com/houqe/POC_CVE-2023-21839
• https://web.archive.org/web/20230831012940/https://github.com/4ra1n/CVE-2023-21839
• https://www.labs.greynoise.io/grimoire/2023-04-21-oracle-weblogic-blog/
• https://www.oracle.com/security-alerts/cpujan2023.html
• https://nvd.nist.gov/vuln/detail/CVE-2023-21839