Default functions in VolatileMemory trait lack bounds checks, potentially leading to out-of-bounds memory accesses
### Impact 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. ### Patches 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. ### Workarounds Not Required ### References https://github.com/rust-vmm/vm-memory/commit/aff1dd4a5259f7deba56692840f7a2d9ca34c9c8 https://crates.io/crates/vm-memory/0.12.2
describes (1)
Related CVEs.
| ID | severity | exploitable | ||
|---|---|---|---|---|
| CVE-2023-41051US | medium4.7 | — | ||
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… | ||||
references
External citations — patches, advisories, analysis.
- https://crates.io/crates/vm-memory/0.12.2WEB
- https://github.com/rust-vmm/vm-memoryPACKAGE
- https://github.com/rust-vmm/vm-memory/commit/aff1dd4a5259f7deba56692840f7a2d9ca34c9c8WEB
- https://github.com/rust-vmm/vm-memory/issues/250WEB
- https://github.com/rust-vmm/vm-memory/security/advisories/GHSA-49hh-fprx-m68gWEB
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/IPXRXD5VXBZHBGMUM77B52CJJMG7EJGIWEB
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/SYM6CYW2DWRHRAVL2HYTQPXC3J2V77J4WEB
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/XZGJL6BQLU4XCPQLLTW4GSSBTNQXB3TIWEB
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