CVE-2023-41051
LowCVSS 2.5Exploitation Probability (EPSS)
Low risk14th percentile — higher than 14% of all known CVEs
Summary
An issue was discovered in the default implementations of the `VolatileMemory` trait functions in a typical Virtual Machine Monitor (VMM), which may lead to out-of-bounds memory access. This affects users of custom `VolatileMemory` implementations that do not adhere to the `get_slice` documentation.
Risk Assessment
Organizations may be exposed to unauthorized memory access, potentially leading to serious security and stability issues. Users of custom implementations should exercise particular caution.
Recommendation
It is recommended to upgrade to version 0.12.2 or later to benefit from the added check on the length of the `VolatileSlice` returned by the `get_slice` function. Additionally, verify that custom implementations adhere to the documentation.
Original NVD description (English source)
In a typical Virtual Machine Monitor (VMM) there are several components, such as boot loader, virtual device drivers, virtio backend drivers and vhost drivers, that need to access the VM physical memory. The vm-memory rust crate provides a set of traits to decouple VM memory consumers from VM memory providers. An issue was discovered in the default implementations of the `VolatileMemory::{get_atomic_ref, aligned_as_ref, aligned_as_mut, get_ref, get_array_ref}` trait functions, which allows out-of-bounds memory access if the `VolatileMemory::get_slice` function returns a `VolatileSlice` whose length is less than the function’s `count` argument. No implementations of `get_slice` provided in `vm_memory` are affected. Users of custom `VolatileMemory` implementations may be impacted if the custom implementation does not adhere to `get_slice`'s documentation. The issue started in version 0.1.0 but was fixed in version 0.12.2 by inserting a check that verifies that the `VolatileSlice` returned by `get_slice` is of the correct length. Users are advised to upgrade. There are no known workarounds for this issue.