Wasmtime is a runtime for WebAssembly. From 46.0.0 until 48.0.7 and 49.0.4, lowering a host-created component-model stream or future into a guest can omit a required payload-type check after the value passes through guest code and returns through StreamAny, FutureAny, Val::Stream, Val::Future, or an equivalent typed reader. A malicious guest that controls exported function types or returned values can cause the host to pass the type-erased value to a guest expecting a different payload type, which panics the Wasmtime host.
This issue is fixed in versions 48.0.7 and 49.0.4.
Attack Parameters
Attack Vector
Network
Can be exploited remotely
Attack Complexity
High
Difficult to exploit
Attack Requirements
Present
Additional conditions required
Privileges Required
High
Admin privileges needed
User Interaction
Passive
Minimal interaction
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 9
https://github.com/bytecodealliance/wasmtime/commit/222ff3a65dab9aa7011f8c24693…
security-advisories@github.com
https://github.com/bytecodealliance/wasmtime/commit/48dacc76241f06088e79f3ce1b1…
security-advisories@github.com
https://github.com/bytecodealliance/wasmtime/commit/994549891c8a706cb4f2809f9d1…
security-advisories@github.com
https://github.com/bytecodealliance/wasmtime/pull/14819
security-advisories@github.com
https://github.com/bytecodealliance/wasmtime/pull/14820
security-advisories@github.com
https://github.com/bytecodealliance/wasmtime/pull/14827
security-advisories@github.com
https://github.com/bytecodealliance/wasmtime/releases/tag/v48.0.7
security-advisories@github.com
https://github.com/bytecodealliance/wasmtime/releases/tag/v49.0.4
security-advisories@github.com
https://github.com/bytecodealliance/wasmtime/security/advisories/GHSA-9pvw-hwfg…
security-advisories@github.com