CVE-2024-43402 Rust OS Command Injection/Argument Injection vulnerability
Attackers can execute arbitrary commands on Windows by exploiting incomplete argument escaping in Rust's process invocation when batch file names contain trailing whitespace or periods.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2024-43402?
CVE-2024-43402 is a high-severity command injection vulnerability in rust-lang rust, published on 4 Sep 2024. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
Rust is a programming language. The fix for CVE-2024-24576, where `std::process::Command` incorrectly escaped arguments when invoking batch files on Windows, was incomplete. Prior to Rust version 1.81.0, it was possible to bypass the fix when the batch file name had trailing whitespace or periods (which are ignored and stripped by Windows). To determine whether to apply the `cmd.exe` escaping rules, the original fix for the vulnerability checked whether the command name ended with `.bat` or `.cmd`. At the time that seemed enough, as we refuse to invoke batch scripts with no file extension. Windows removes trailing whitespace and periods when parsing file paths. For example, `.bat. .` is interpreted by Windows as `.bat`, but the original fix didn't check for that. Affected users who are using Rust 1.77.2 or greater can remove the trailing whitespace (ASCII 0x20) and trailing periods (ASCII 0x2E) from the batch file name to bypass the incomplete fix and enable the mitigations. Users are affected if their code or one of their dependencies invoke a batch script on Windows with trailing whitespace or trailing periods in the name, and pass untrusted arguments to it. Rust 1.81.0 will update the standard library to apply the CVE-2024-24576 mitigations to all batch files invocations, regardless of the trailing chars in the file name.
Which versions are affected by CVE-2024-43402?
It affects 1 product.
Products include Rust-Lang Rust.
How do I fix CVE-2024-43402?
No fix has been published for CVE-2024-43402 yet. Limit exposure of the affected software until one is available.
Upgrade, and pass arguments to programs as a list instead of through a shell. More about Command injection.
Is CVE-2024-43402 being exploited?
There is no known exploitation of CVE-2024-43402 in the wild and no public exploit code.
Other vulnerabilities in rust-lang rust
Sources
Also known as GHSA-2xg3-7mm6-98jj.