CVE-2020-35865 os_str_bytes relies on undefined behavior of `char::from_u32_unchecked`
The os_str_bytes crate mishandles character conversion, potentially causing unexpected behavior in Rust applications using it.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2020-35865?
CVE-2020-35865 is a high-severity vulnerability in n/a, published on 31 Dec 2020. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
An issue was discovered in the os_str_bytes crate before 2.0.0 for Rust. It has false expectations about char::from_u32_unchecked behavior.
Which versions are affected by CVE-2020-35865?
3 open source packages ship an affected version, including os_str_bytes. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
os_str_bytes crates.io | All versions | 2.0.0 |
os_str_bytes crates.io | All versions | 2.0.0 |
os_str_bytes crates.io | From 0.0.0-0 | 2.0.0 |
Products include Os Str Bytes Project Os Str Bytes.
How do I fix CVE-2020-35865?
Upgrade os_str_bytes to 2.0.0 or later.
Is CVE-2020-35865 being exploited?
There is no known exploitation of CVE-2020-35865 in the wild and no public exploit code.
Sources
Also known as GHSA-q948-x8rf-888m, RUSTSEC-2020-0012.