CVE-2021-39049

Vulnerability

IBM i2 Analyst's Notebook versions 9.2.0, 9.2.1, and 9.2.2 are vulnerable to a stack-based buffer overflow caused by improper bounds checking [1]. The vulnerability exists within the application's handling of user-supplied data, though specific conditions or configurations required to reach the vulnerable code path are not disclosed in the available references.

Exploitation

Exploitation requires local access to the system and user interaction [1]. The attacker must convince a user to open a malicious file or provide crafted input. The CVSS vector indicates that no authentication is needed but user interaction is required, and exploitation results in low privileges being gained [1]. The exact steps to trigger the overflow are not published.

Impact

Successful exploitation allows a local attacker to overflow a stack-based buffer and achieve lower-level privileges [1]. The CVSS scoring indicates potential low impacts on confidentiality, integrity, and availability (C:L/I:L/A:L) [1]. Specific impacts such as information disclosure or arbitrary code execution are not detailed in the references.

Mitigation

IBM has released a fix in the 9.3.1 continuous delivery update [1]. Users should upgrade to version 9.3.1 or later. No workarounds or mitigations are available other than applying the update [1]. The vulnerability is not listed on the CISA KEV (as of the publication date).