High · published October 17, 2025
⚡ Just one crafty JSON payload can send your server spiraling into memory overload! Think of it like a suitcase that expands tenfold once you start unpacking it at the airport—what looks manageable at first can quickly become an overwhelming mess. An attacker can send a specially crafted JSON object that bypasses protection limits, leading to a server crash, much like overpacking can lead to a broken zipper! An unauthenticated attacker could trigger an out-of-memory crash on your server, rendering it unavailable to legitimate users. This vulnerability could lead to denial of service, seriously disrupting your application's functionality. Not to mention, the audit subsystem could also consume excessive CPU resources, slowing down your system even more!
Think of it like a suitcase that expands tenfold once you start unpacking it at the airport—what looks manageable at first can quickly become an overwhelming mess. An attacker can send a specially crafted JSON object that bypasses protection limits, leading to a server crash, much like overpacking can lead to a broken zipper! In OpenBao versions prior to 2.4.1, the system allows for crafted JSON payloads that inflate memory usage drastically after decoding. This occurs early in the request handling process, before any authentication checks, making it particularly dangerous.
An unauthenticated attacker could trigger an out-of-memory crash on your server, rendering it unavailable to legitimate users. This vulnerability could lead to denial of service, seriously disrupting your application's functionality. Not to mention, the audit subsystem could also consume excessive CPU resources, slowing down your system even more! Upgrade to OpenBao version 2.4.1 immediately to patch this vulnerability. Additionally, review your configuration settings for max_request_size to ensure they're properly set. Regularly audit JSON handling in your applications to catch similar issues in the future! You can tackle this! Update your software and keep your systems safe from this sneaky vulnerability. 🛡️
| Product | Versions | Fixed in |
|---|---|---|
| openbao/openbao | < 2.4.1 | 2.4.1 |