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Vulnerability DatabaseCVE-2023-45931

CVE-2023-45931: 
NixOS vulnerability analysis and mitigation

Overview

Mesa 23.0.4 contains a NULL pointer dereference vulnerability in the checkxshm() function for the haserror state (CVE-2023-45931). This vulnerability is currently disputed as there is no scenario in which the vulnerability was demonstrated (NVD).

Technical details

The vulnerability involves a potential NULL pointer dereference in the checkxshm() function. Specifically, when the X11 connection is in a haserror state, xcbwaitforreply() returns NULL which is not properly checked by checkxshm(). The vulnerability has been assigned a CVSS v3.1 Base Score of 7.5 (HIGH) with vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H (Mesa Issue).

Impact

If successfully exploited, this vulnerability could lead to a segmentation fault due to the NULL pointer dereference. However, the practical impact is disputed as there are no demonstrated scenarios where this vulnerability could be meaningfully exploited (Full Disclosure).

Community reactions

The security community has expressed skepticism about the severity of this vulnerability. Dan Cross, in response to the vulnerability disclosure, stated that it's "very difficult to believe that every NULL pointer error in existence is a security vulnerability" (Full Disclosure).

Additional resources

Source: This report was generated using AI

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