CVE-2023-40133: 
NixOS vulnerability analysis and mitigation

In multiple locations of DialogFillUi.java, there exists a vulnerability that allows viewing another user's images due to a confused deputy issue. This vulnerability, identified as CVE-2023-40133, affects Android versions 11.0, 12.0, 12.1, and 13.0. The vulnerability was discovered and reported to Android security team, with the fix being released in the October 2023 security bulletin (Android Security Bulletin).

The vulnerability is present in the Android framework's autofill service, specifically in the DialogFillUi.java component. It manifests as a confused deputy issue that could lead to unauthorized access to user images. The vulnerability has been assigned a CVSS v3.1 base score of 5.5 (Medium), with the vector string CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N, indicating local access, low attack complexity, low privileges required, no user interaction needed, and high confidentiality impact (NVD).

The vulnerability allows local information disclosure without requiring additional execution privileges. An attacker could potentially view images belonging to another user through a malicious Autofill provider, leading to a security spill where content from one user becomes visible to another (Android Git Commit).

Google has addressed this vulnerability by implementing a fix that verifies URI permissions in Autofill RemoteViews. The patch checks permissions of URIs inside FillResponse's RemoteViews, and if the current user does not have the required permissions to view the URI, the RemoteView is dropped from displaying (Android Git Commit).