49 lines
2.2 KiB
Markdown
49 lines
2.2 KiB
Markdown
---
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id: "bug-1952"
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status: "investigating"
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status_updated: "2026-10-10"
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status_note: "suspected from source reading; confirm with a test before fixing"
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component: "apiserver"
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severity: "security"
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timestamp: "2026-10-10T08:15:16Z"
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last_seen: "2026-10-10T08:15:16Z"
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occurrences: 1
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files: ["src/frontend/apiserver/controllers/users.go"]
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tags: ["apiserver", "security", "rbac"]
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related: []
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---
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# bug-1952: apiserver user role changes check a narrower rbac:control grant only against the target user
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## Description
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**Observed:** (source reading, `.kiro/reviews/project-gap-review-2026-10-10.md` (P0); to be confirmed by a failing test before the fix)
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Suspected (needs verification): in add/delete roles for a user, a non-`all` `rbac:control` grant is only checked against "is the target me?" (`controllers/users.go:404-412,455-462`), so such a grant could let a user give itself `cluster_admin`. Built-in roles grant `rbac:control` only with domain `all` (`config/rbac.yaml:100-102`), so this is latent.
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**Expected:** A user can never grant itself a role with more rights than it already holds.
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**Impact:** Security (latent): privilege escalation through a custom role.
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**Found by:** review: `.kiro/reviews/project-gap-review-2026-10-10.md` (P0)
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## Environment
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- OS: no /etc/os-release; Docker container; NixOS kernel; kernel Linux 6.18.33 x86_64
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- libc: glibc 2.42-47 (interpreter /nix/store/wb6rhpznjfczwlwx23zmdrrw74bayxw4-glibc-2.42-47/lib/ld-linux-x86-64.so.2)
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- Toolchain: gcc (GCC) 15.2.0, meson 1.9.1
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- Build: asan (xce.build)
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- Code: scheduler-framework @ 94472ee3-dirty
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- Deployment: any (found by source reading; the failing test that confirms it is named in Verification)
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## Reproduction
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1. Define a role with `rbac:control` scoped to `self`, assign it to a user, then add `cluster_admin` to that same user via the users API.
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- Frequency: deterministic (by code reading; confirmed by the RED test of the fix)
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- Evidence: the code sites quoted in Description; no logs kept.
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## Root cause
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TODO: required for fixed/partial
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## Fix
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TODO: required for fixed/partial
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## Verification
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- Test: TODO: name + file; RED before the fix, GREEN after
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- Suites: TODO: suite results and build profile
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- Live: TODO: soak/deploy run, or n/a and why
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## References
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- Related: none
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