Jawn is an open source JSON parser. Extenders of the org.typelevel.jawn.SimpleFacade and org.typelevel.jawn.MutableFacade who dont override objectContext() are vulnerable to a hash collision attack which may result in a denial of service. Most applications do not implement these traits directly, but inherit from a library. jawn-parser-1.3.1 fixes this issue and users are advised to upgrade. For users unable to upgrade override objectContext() to use a collision-safe collection.
The product does not properly control the allocation and maintenance of a limited resource.
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Jawn | Typelevel | * | 1.3.2 (excluding) |
| Jawn | Ubuntu | focal | * |
| Jawn | Ubuntu | hirsute | * |
| Jawn | Ubuntu | impish | * |
| Jawn | Ubuntu | kinetic | * |
| Jawn | Ubuntu | lunar | * |
| Jawn | Ubuntu | mantic | * |
| Jawn | Ubuntu | oracular | * |
| Jawn | Ubuntu | trusty | * |
| Jawn | Ubuntu | xenial | * |
Mitigation of resource exhaustion attacks requires that the target system either:
The first of these solutions is an issue in itself though, since it may allow attackers to prevent the use of the system by a particular valid user. If the attacker impersonates the valid user, they may be able to prevent the user from accessing the server in question.
The second solution is simply difficult to effectively institute – and even when properly done, it does not provide a full solution. It simply makes the attack require more resources on the part of the attacker.