msgpack-java through 0.9.12 contains a stack overflow vulnerability in MessageUnpacker.unpackValue() that recursively deserializes arrays and maps without nesting depth limits. Attackers can craft payloads with deeply nested arrays to exhaust the deserializing thread's stack and trigger StackOverflowError, causing per-request deserialization failures.
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
Low
Partial disruption
CVSS Vector v4.0
Weakness Type (CWE)
References 4
https://github.com/msgpack/msgpack-java
disclosure@vulncheck.com
https://github.com/msgpack/msgpack-java/blob/v0.9.12/msgpack-core/src/main/java…
disclosure@vulncheck.com
https://github.com/msgpack/msgpack-java/issues/1015
disclosure@vulncheck.com
https://www.vulncheck.com/advisories/msgpack-java-through-0.9.12-stack-overflow…
disclosure@vulncheck.com