CVE-2020-4553

Vulnerability

IBM i2 Analyst Notebook versions 9.2.1 and 9.2.2 contain a memory corruption vulnerability that can be triggered when a user opens a specially-crafted file. The flaw resides in the parsing logic of the application and does not require any special privileges to exploit, beyond the ability of the attacker to craft the malicious file and persuade the victim to open it. The vulnerability is identified as a memory corruption issue (CWE-119) and is assigned the IBM X-Force ID 183321 [1].

Exploitation

An attacker must first craft a malicious file that exploits the memory corruption. The attacker then needs to persuade a user (victim) to open this file using IBM i2 Analyst Notebook on a local system. No network access or additional authentication is required; the attack vector is local and depends on user interaction. The steps involve social engineering to convince the victim to open the file, at which point the memory corruption leads to arbitrary code execution in the context of the application [1].

Impact

Successful exploitation allows the attacker to execute arbitrary code on the affected system. This can lead to full compromise of the user's session, including the ability to read, modify, or delete data, install programs, or create new accounts with full user rights. The Confidentiality, Integrity, and Availability (CIA) impact is considered high, with a CVSS base score of 7.8 [1].

Mitigation

IBM has released fixed versions to address CVE-2020-4553. Users should upgrade to IBM i2 Analyst Notebook version 9.2.3 or later, as per the vendor advisory [1]. No workarounds are listed in the available references; upgrading is the recommended mitigation.