CVSS: 7.4EPSS: 0%CPEs: 2EXPL: 0CVE-2022-39392 – Wasmtime vulnerable to out of bounds read/write with zero-memory-pages configuration
https://notcve.org/view.php?id=CVE-2022-39392
Wasmtime is a standalone runtime for WebAssembly. Prior to version 2.0.2, there is a bug in Wasmtime's implementation of its pooling instance allocator when the allocator is configured to give WebAssembly instances a maximum of zero pages of memory. In this configuration, the virtual memory mapping for WebAssembly memories did not meet the compiler-required configuration requirements for safely executing WebAssembly modules. Wasmtime's default settings require virtual memory page faults to indicate that wasm reads/writes are out-of-bounds, but the pooling allocator's configuration would not create an appropriate virtual memory mapping for this meaning out of bounds reads/writes can successfully read/write memory unrelated to the wasm sandbox within range of the base address of the memory mapping created by the pooling allocator. This bug is not applicable with the default settings of the `wasmtime` crate. • https://github.com/bytecodealliance/wasmtime/commit/e60c3742904ccbb3e26da201c9221c38a4981d72 https://github.com/bytecodealliance/wasmtime/security/advisories/GHSA-44mr-8vmm-wjhg • CWE-119: Improper Restriction of Operations within the Bounds of a Memory Buffer CWE-125: Out-of-bounds Read CWE-787: Out-of-bounds Write •
CVSS: 8.6EPSS: 0%CPEs: 2EXPL: 0CVE-2022-39393 – Wasmtime vulnerable to data leakage between instances in the pooling allocator
https://notcve.org/view.php?id=CVE-2022-39393
Wasmtime is a standalone runtime for WebAssembly. Prior to version 2.0.2, there is a bug in Wasmtime's implementation of its pooling instance allocator where when a linear memory is reused for another instance the initial heap snapshot of the prior instance can be visible, erroneously to the next instance. This bug has been patched and users should upgrade to Wasmtime 2.0.2. Other mitigations include disabling the pooling allocator and disabling the `memory-init-cow`. Wasmtime es una ejecución independiente de WebAssembly. • https://github.com/bytecodealliance/wasmtime/commit/2614f2e9d2d36805ead8a8da0fa0c6e0d9e428a0 https://github.com/bytecodealliance/wasmtime/security/advisories/GHSA-wh6w-3828-g9qf • CWE-212: Improper Removal of Sensitive Information Before Storage or Transfer CWE-226: Sensitive Information in Resource Not Removed Before Reuse •