Mooncake transfer engine before 0.3.12 contains an out-of-bounds read vulnerability in the readString function of include/common.h that allows unauthenticated attackers to crash the service by sending a zero-length handshake frame. Attackers can connect to the handshake port listening on all interfaces and send an eight-byte frame to terminate the hosting process, such as an SGLang inference server.
Attack Parameters
Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
Attack Requirements
None
No additional conditions
Privileges Required
None
No privileges needed
User Interaction
None
No user interaction needed
Impact Assessment
Confidentiality
None
No data leak
Integrity
None
No data modification
Availability
High
Complete denial of service
CVSS Vector v4.0
Weakness Type (CWE)
References 4
https://github.com/kvcache-ai/Mooncake
disclosure@vulncheck.com
https://github.com/kvcache-ai/Mooncake/commit/c142b40590259360196d8e504b2193382…
disclosure@vulncheck.com
https://github.com/kvcache-ai/Mooncake/issues/4452
disclosure@vulncheck.com
https://www.vulncheck.com/advisories/mooncake-before-0.3.12-out-of-bounds-read-…
disclosure@vulncheck.com