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GHSA-q729-696q-g9pq
No affected components available
The SurrealDB value and JSON parser did not enforce the configured recursion depth limit when parsing nested {, [, or ( tokens. The expression parser already enforced the limit for these tokens; the value/JSON parser omitted it. An unauthenticated attacker could send a deeply nested JSON payload to the WebSocket /rpc endpoint and exhaust server memory, crashing the process.
This is an incomplete fix for GHSA-6r8p-hpg7-825g, which addressed the same class of bug in the expression parser but did not cover the value/JSON parser code path.
Impact
An unauthenticated remote attacker can crash a SurrealDB server with a single WebSocket message. No credentials or query execution privileges are required.
Patches
A patch enforces the configured recursion depth limit in parse_value and parse_json, bringing them in line with the rest of the parser.
- Versions 3.1.0 and later are not affected by this issue.
Workarounds
Restrict network access to the WebSocket /rpc endpoint to trusted clients.
The vulnerability can be exploited over the network without needing physical access. It is easy for an attacker to exploit this vulnerability. An attacker does not need any special privileges or access rights. No user interaction is needed for the attacker to exploit this vulnerability. The impact is confined to the system where the vulnerability exists. There is a high impact on the availability of the system.
Exploitation attempts have been detected. Elevated vigilance and prompt remediation are advised.
Probability that this vulnerability will be exploited in the wild within the next 30 days.
We did not find any exploit available. Neither in GitHub repositories nor in the Exploit-Database.
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