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GHSA-3633-g6mg-p6qq
No affected components available
An authenticated user can craft a query using the string::replace function that uses a Regex to perform a string replacement. As there is a failure to restrict the resulting string length, this enables an attacker to send a string::replace function to the SurrealDB server exhausting all the memory of the server due to string allocations. This eventually results in a Denial-of-Service situation for the SurrealDB server.
This issue was discovered and patched during an code audit and penetration test of SurrealDB by cure53. Using CVSSv4 definitions, the severity is High.
Impact
An authenticated user can crash the SurrealDB instance through memory exhaustion
Patches
A patch has been created that enforces a limit on string length SURREAL_GENERATION_ALLOCATION_LIMIT
- Versions 2.0.5, 2.1.5, 2.2.2, and later are not affected by this issue
Workarounds
Affected users who are unable to update may want to limit the ability of untrusted clients to run the string::replace function in the affected versions of SurrealDB using the --deny-functions flag described within Capabilities or the equivalent SURREAL_CAPS_DENY_FUNC environment variable.
References
SurrealQL Documentation - DB Functions (string::replace) SurrealDB Documentation - Capabilities SurrealDB Documentation - Environment Variables #5619 #5638
The vulnerability can be exploited over the network without needing physical access. It is easy for an attacker to exploit this vulnerability. An attacker needs basic access or low-level privileges. No user interaction is needed for the attacker to exploit this vulnerability.
Exploitation attempts have been detected. Elevated vigilance and prompt remediation are advised.
The exploit probability is very low. The vulnerability is unlikely to be exploited in the next 30 days.
We did not find any exploit available. Neither in GitHub repositories nor in the Exploit-Database.
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