GHSA-xrv3-jmcp-374j zerovec incorrectly uses `#[repr(packed)]`
Attackers can trigger illegal memory accesses in applications using the zerovec library due to incorrect struct packing assumptions, potentially leading to crashes or code execution.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Not stated
- Victim action needed
- Not needed
- Fix
- Available
What is GHSA-xrv3-jmcp-374j?
GHSA-xrv3-jmcp-374j is a memory corruption vulnerability in zerovec, published on 1 Jul 2024.
Official description
The affected versions make unsafe memory accesses under the assumption that #[repr(packed)] has a guaranteed field order.
The Rust specification does not guarantee this, and https://github.com/rust-lang/rust/pull/125360 (1.80.0-beta) starts
reordering fields of #[repr(packed)] structs, leading to illegal memory accesses.
The patched versions 0.9.7 and 0.10.4 use #[repr(C, packed)], which guarantees field order.
Which versions are affected by GHSA-xrv3-jmcp-374j?
5 open source packages ship an affected version, including zerovec.
| Package | Affected | Fixed in |
|---|---|---|
zerovec crates.io | All versions | 0.9.7 |
zerovec crates.io | All versions | 0.9.7 |
zerovec crates.io | From 0.0.0-0 | 0.9.7, 0.10.4 |
zerovec crates.io | From 0.10.0 | 0.10.4 |
zerovec crates.io | From 0.10.0 | 0.10.4 |
How do I fix GHSA-xrv3-jmcp-374j?
Upgrade zerovec to a fixed version for your release line: 0.9.7 or 0.10.4.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is GHSA-xrv3-jmcp-374j being exploited?
There is no known exploitation of GHSA-xrv3-jmcp-374j in the wild and no public exploit code.
Sources
Also known as RUSTSEC-2024-0347.