CVE-2024-31449

What it actually does

An authenticated user can supply a crafted Lua script that triggers a stack buffer overflow in the bit library, enabling potential remote code execution on the Redis server.

Why it matters to the business

Successful exploitation could allow an attacker to execute arbitrary code, leading to database compromise, data theft, or system takeover; the issue affects widely used database and proxy deployments with no known workarounds, though exploitation requires authentication and current threat activity remains low.

How an attack unfolds

An attacker first obtains valid credentials, then submits a malicious Lua script through the Redis scripting interface that overflows the bit library stack buffer to achieve code execution.

How to fix it

Upgrade Redis to version 6.2.16, 7.2.6, or 7.4.1; upgrade Traefik v2 to 2.10.6 and Traefik v3 to 3.0.0-beta5. No workarounds exist; apply the exact fixed commits or releases listed for each component.

How to confirm the fix worked

Verify the running Redis or Traefik binary version matches a fixed release; attempt to reproduce the overflow with a test Lua bit script in a non-production environment to confirm the vulnerability is no longer present.

Typical attack path

1. Obtain valid Redis authentication credentials
2. Connect to the Redis instance and issue a crafted EVAL or EVALSHA command containing malicious Lua bit operations
3. Trigger the stack buffer overflow to redirect execution flow
4. Execute arbitrary code on the host

How to detect it

Review Redis command logs and slow-log entries for unusual Lua scripts containing bit library calls; correlate with authentication events and look for post-exploitation process anomalies on the host.

What your security team should do

• Immediately schedule upgrades to the listed fixed versions for all Redis and dependent Traefik instances
• Restrict Lua scripting permissions to the minimum required accounts
• Monitor authentication and command logs for anomalous EVAL usage until patching is complete
• Review downstream dependents for transitive exposure given the ecosystem prevalence