Package Instance

simple-git has blockUnsafeOperationsPlugin bypass via case-insensitive protocol.allow config key enables RCE
The `blockUnsafeOperationsPlugin` in `simple-git` fails to block git protocol
override arguments when the config key is passed in uppercase or mixed case.
An attacker who controls arguments passed to git operations can enable the
`ext::` protocol by passing `-c PROTOCOL.ALLOW=always`, which executes an
arbitrary OS command on the host machine.

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| # | Vector | Payload | Sentinel file | Result |
|---|--------|---------|---------------|--------|
| 1 | CVE-2022-25912 original | `protocol.ext.allow=always` (lowercase) | not created | Blocked ✅ |
| 2 | Case-sensitivity bypass | `PROTOCOL.ALLOW=always` (uppercase) | `/tmp/pwn-codeant` created | **RCE ⚠️** |
| 3 | Real-world app scenario | `PROTOCOL.ALLOW=always` + attacker URL | `/tmp/pwn-realworld` created | **RCE ⚠️** |

The case-sensitive regex in `preventProtocolOverride` blocks `protocol.*.allow` but does not account for uppercase or mixed-case variants. Git accepts all variants identically due to case-insensitive config key normalisation, allowing full bypass of the protection in all versions of simple-git that carry the 2022 fix.

`/tmp/pwned` is created by the git subprocess via the `ext::` protocol.

All of the following bypass the check:

| Argument passed via `-c` | Regex matches? | Git honours it? |
|--------------------------|:--------------:|:---------------:|
| `protocol.allow=always`  | ✅ blocked     | ✅              |
| `PROTOCOL.ALLOW=always`  | ❌ bypassed    | ✅              |
| `Protocol.Allow=always`  | ❌ bypassed    | ✅              |
| `PROTOCOL.allow=always`  | ❌ bypassed    | ✅              |
| `protocol.ALLOW=always`  | ❌ bypassed    | ✅              |

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