CVE-2020-4549 in i2 Analyst Notebook
Summary
by MITRE
IBM i2 Analyst Notebook 9.2.1 could allow a local attacker to execute arbitrary code on the system, caused by a memory corruption. By persuading a victim to open a specially-crafted file, an attacker could exploit this vulnerability to execute arbitrary code on the system. IBM X-Force ID: 183317.
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Analysis
by VulDB Data Team • 11/06/2020
IBM i2 Analyst Notebook version 9.2.1 contains a critical memory corruption vulnerability that enables local privilege escalation through arbitrary code execution. This vulnerability stems from insufficient input validation and memory management within the application's file processing mechanisms. The flaw exists in how the software handles specially crafted files during the parsing process, creating opportunities for attackers to manipulate memory structures and execute malicious code with elevated privileges. The vulnerability is particularly concerning because it requires minimal user interaction beyond opening a malicious file, making it susceptible to social engineering attacks where victims might unknowingly trigger the exploit.
The technical implementation of this vulnerability aligns with common memory corruption patterns identified in CWE-121, which describes heap-based buffer overflow conditions, and CWE-125, which covers out-of-bounds read errors. Attackers can exploit this weakness by crafting malicious files that trigger memory corruption when processed by the Analyst Notebook application. The attack vector specifically targets the application's file parsing engine, where improper bounds checking allows attackers to overwrite memory locations and potentially redirect execution flow. This type of vulnerability falls under the ATT&CK technique T1059.007 for command and scripting interpreter, as successful exploitation would enable attackers to execute arbitrary commands within the system's context. The memory corruption aspect makes this particularly dangerous as it can lead to complete system compromise when combined with privilege escalation techniques.
The operational impact of this vulnerability extends beyond simple code execution, as it provides attackers with persistent access to the target system. Once exploited, the attacker gains the ability to perform actions such as installing additional malware, modifying system configurations, accessing sensitive data, or establishing backdoor access points. The vulnerability affects systems running IBM i2 Analyst Notebook 9.2.1, which is commonly used in intelligence analysis and threat detection environments, making it particularly attractive to adversaries seeking access to sensitive information. Organizations utilizing this software in enterprise environments face significant risk exposure, as the vulnerability can be exploited by both internal malicious actors and external threat groups. The attack requires no specialized tools beyond basic file crafting capabilities, making it accessible to a wide range of threat actors.
Mitigation strategies should focus on immediate patch management and system hardening measures. IBM has released patches addressing this vulnerability, and organizations should prioritize applying the latest security updates to all affected systems. Additionally, implementing file validation controls and restricting user privileges can significantly reduce exploitation risk. Network segmentation and monitoring systems should be enhanced to detect suspicious file access patterns and potential exploitation attempts. Security teams should also consider implementing application whitelisting policies to prevent execution of unauthorized binaries. The vulnerability demonstrates the importance of proper input validation and memory management practices, aligning with security frameworks such as NIST SP 800-160 and ISO 27001 requirements for secure software development. Regular security assessments and penetration testing should be conducted to identify similar vulnerabilities in other applications within the organization's attack surface.