CVE-2021-26954 insert_slice_clone can double drop if Clone panics.
A double drop vulnerability in the qwutils Rust crate allows attackers to cause memory corruption, potentially leading to crashes or arbitrary code execution.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2021-26954?
CVE-2021-26954 is a medium-severity use after free vulnerability in n/a, published on 9 Feb 2021. 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 qwutils crate before 0.3.1 for Rust. When a Clone panic occurs, insert_slice_clone can perform a double drop.
Weakness: CWE-415
Which versions are affected by CVE-2021-26954?
3 open source packages ship an affected version, including qwutils. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
qwutils crates.io | All versions | 0.3.1 |
qwutils crates.io | All versions | 0.3.1 |
qwutils crates.io | From 0.0.0-0 | 0.3.1 |
Products include Qwutils Project Qwutils.
How do I fix CVE-2021-26954?
Upgrade qwutils to 0.3.1 or later.
Upgrade to the fixed version. These bugs are found with fuzzing and sanitisers and avoided by memory-safe languages. More about Use after free.
Is CVE-2021-26954 being exploited?
There is no known exploitation of CVE-2021-26954 in the wild and no public exploit code.
Sources
Also known as GHSA-68p4-pjpf-xwcq, RUSTSEC-2021-0018.