CVE-2020-4554 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: 183322.
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Analysis
by VulDB Data Team • 11/07/2020
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 within the application's file processing mechanisms, specifically when handling specially crafted files that trigger memory corruption conditions. The flaw exists in the software's handling of malformed data structures during file parsing operations, creating potential buffer overflow or heap corruption scenarios that can be exploited by malicious actors. The vulnerability is particularly concerning because it requires minimal user interaction to exploit, as attackers only need to persuade victims to open maliciously crafted files within the application context.
The technical implementation of this vulnerability involves the application's failure to properly validate file headers and data structures when processing analyst notebook files. When a user opens a specially crafted file, the application's memory management routines execute without adequate bounds checking, allowing attackers to manipulate memory layout and potentially overwrite critical program structures. This memory corruption can lead to execution of arbitrary code with the privileges of the victim user, potentially escalating to system-level access depending on the target environment. The vulnerability aligns with CWE-121, heap-based buffer overflow, and CWE-125, out-of-bounds read, as the application fails to properly validate memory boundaries during file processing operations.
The operational impact of this vulnerability extends beyond simple code execution, as it represents a significant attack surface for lateral movement within enterprise environments where i2 Analyst Notebook is deployed. Organizations using these vulnerable versions face potential data compromise, system takeover, and persistence mechanisms through the execution of malicious payloads. The attack vector is particularly dangerous in analyst environments where users frequently process external data sources and reports, making social engineering attacks through malicious file attachments highly effective. This vulnerability can be exploited by attackers who gain access to the victim's session or through phishing campaigns targeting analyst personnel who regularly work with the application.
Security mitigations for this vulnerability require immediate patching of affected IBM i2 Analyst Notebook installations to versions that address the memory corruption issues. Organizations should implement strict file validation policies and user education programs to prevent opening untrusted files within the application environment. Network segmentation and privilege separation can help limit the potential impact of successful exploitation attempts, while monitoring solutions should be configured to detect anomalous file processing activities. The vulnerability demonstrates the importance of secure coding practices and input validation, aligning with ATT&CK technique T1059.007 for command and scripting interpreter and T1068 for exploit for privilege escalation. System administrators should also consider implementing application whitelisting policies to restrict execution of unauthorized binaries and reduce the attack surface for memory corruption exploits.