In hasNamedWallpaper of WallpaperManagerService.java, there is a possible way to determine whether an app is installed, without query permissions, due to a missing permission check. This could lead to local information disclosure with no additional execution privileges needed. User interaction is not needed for exploitation.
{ "vanir_signatures": [ { "digest": { "threshold": 0.9, "line_hashes": [ "39275217561838728963992075719630011395", "60949154431976449709105693195531616887", "261464316904973385258147136598452934597", "227214050609644533085085003222725773304", "175625025981031983434455603619840749403", "98874412179968923432749838123742731022", "181300433046089138343853969056757871617", "238714527340987671693651969324152567441", "107399261705791472036583292945930006355" ] }, "id": "PUB-A-193800652-c69b02ce", "source": "https://android.googlesource.com/platform/frameworks/base/+/c7de46c8e45b0a81da65bb63220f1e502cf04921", "deprecated": false, "signature_version": "v1", "target": { "file": "services/core/java/com/android/server/wallpaper/WallpaperManagerService.java" }, "signature_type": "Line" }, { "digest": { "length": 562.0, "function_hash": "260323520536712876715714027822045432317" }, "id": "PUB-A-193800652-e10ef509", "source": "https://android.googlesource.com/platform/frameworks/base/+/c7de46c8e45b0a81da65bb63220f1e502cf04921", "deprecated": false, "signature_version": "v1", "target": { "file": "services/core/java/com/android/server/wallpaper/WallpaperManagerService.java", "function": "hasNamedWallpaper" }, "signature_type": "Function" } ], "fixes": [ "https://android.googlesource.com/platform/frameworks/base/+/c7de46c8e45b0a81da65bb63220f1e502cf04921" ], "spl": "2021-12-01", "severity": "Moderate", "types": [ "ID" ] }