CVE-2020-4553 in i2 Analyst Notebook
Summary
by MITRE
IBM i2 Analyst Notebook 9.2.1 and 9.2.2 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: 183321.
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Analysis
by VulDB Data Team • 11/06/2020
IBM i2 Analyst Notebook version 9.2.1 and 9.2.2 contains a critical memory corruption vulnerability that enables local privilege escalation through arbitrary code execution. This vulnerability stems from improper input validation and memory handling within the application's file processing mechanisms. The flaw exists in the way the software parses and handles specially crafted files, creating conditions where memory corruption can occur during file opening operations. Attackers can exploit this weakness by enticing victims to open maliciously constructed files that trigger the vulnerable code path, ultimately allowing execution of arbitrary code with the privileges of the target user.
The technical nature of this vulnerability aligns with common software security flaws classified under CWE-121, which describes heap-based buffer overflow conditions, and CWE-125, which covers out-of-bounds read vulnerabilities. These classifications indicate that the memory corruption occurs when the application attempts to access memory locations beyond the allocated buffer boundaries or when it reads from memory regions that have been freed or are otherwise invalid. The attack vector specifically leverages social engineering techniques through file manipulation, requiring user interaction to initiate the exploit. According to ATT&CK framework, this vulnerability maps to T1059.007 for command and scripting interpreter, and T1203 for exploitation for client execution, as it requires the target to open a malicious file for exploitation to occur.
The operational impact of this vulnerability extends beyond simple code execution, as it provides attackers with a potential foothold for further system compromise. Local attackers who can persuade users to open malicious files gain the ability to execute arbitrary commands, potentially leading to complete system compromise. The vulnerability affects the application's integrity and confidentiality, as successful exploitation could allow attackers to access sensitive data, modify system configurations, or establish persistent access mechanisms. Organizations using these specific versions of IBM i2 Analyst Notebook face significant risk, particularly in environments where users may encounter untrusted files or where privilege escalation could lead to broader network access.
Mitigation strategies for this vulnerability should focus on immediate patch management and operational security improvements. Organizations must prioritize updating to patched versions of IBM i2 Analyst Notebook as soon as possible, as IBM has released security fixes addressing this specific memory corruption issue. Network segmentation and user access controls should be implemented to limit the potential impact of successful exploitation, particularly by restricting user privileges and implementing least-privilege principles. Additionally, security awareness training should be enhanced to educate users about the dangers of opening untrusted files, and file monitoring systems should be deployed to detect and prevent the execution of potentially malicious files. System administrators should also consider implementing application whitelisting policies to restrict execution of unauthorized software and monitor for unusual file processing activities that could indicate exploitation attempts.