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🔒 Fix use of eval() for Lua Script Execution in Redis Lock#203

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security-fix-redis-lock-eval-13317321148588775224
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🔒 Fix use of eval() for Lua Script Execution in Redis Lock#203
giovannibaratta wants to merge 1 commit into
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security-fix-redis-lock-eval-13317321148588775224

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@giovannibaratta

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🎯 What: The eval() function used to execute a Lua script in RedisLock has been removed and replaced with a registered command using defineCommand.
⚠️ Risk: Although the currently executed string is statically defined, relying on eval() can trigger static analysis warnings and is generally considered an anti-pattern when safer script registration mechanisms exist. If the input parameters were ever dynamically concatenated, it could lead to Lua script injection (a form of command injection on the Redis server).
🛡️ Solution: ioredis's native defineCommand method is utilized to define the releaseLock command once. The release method is updated to execute the command directly (this.redis.releaseLock), thus delegating the safe handling and transmission of the script (EVALSHA) directly to the ioredis client.


PR created automatically by Jules for task 13317321148588775224 started by @giovannibaratta

The use of dynamic `eval()` execution for the Lua script in `app/external/src/redis/redis-lock.ts` poses a potential security risk and is flagged by static analysis. This has been remediated by using `ioredis`'s `defineCommand` to pre-register the release lock script securely.

- Added `defineCommand` and `releaseLock` type definitions to the `RedisLockClient` interface.
- Registered the script once in the `RedisLock` constructor using `defineCommand`.
- Updated the `release` method to use the dynamically added `releaseLock` command instead of `eval`.
- Completely removed the `eval` fallback execution from the release method, rejecting instead when `defineCommand` registration hasn't succeeded.

Co-authored-by: giovannibaratta <11740915+giovannibaratta@users.noreply.github.com>
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