CVE-2021-45720 Use after free in lru crate
A use-after-free vulnerability in the lru crate allows attackers to cause crashes or potentially execute arbitrary code via iterator misuse.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2021-45720?
CVE-2021-45720 is a high-severity use after free vulnerability in n/a, published on 26 Dec 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 lru crate before 0.7.1 for Rust. The iterators have a use-after-free, as demonstrated by an access after a pop operation.
Weakness: CWE-416
Which versions are affected by CVE-2021-45720?
5 open source packages ship an affected version, including lru. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
lru crates.io | All versions | 0.7.1 |
lru crates.io | All versions | 0.7.1 |
lru crates.io | All versions | 0.7.1 |
lru crates.io | All versions | 0.7.1 |
lru crates.io | From 0.0.0-0 | 0.7.1 |
Products include Lru Project Lru.
How do I fix CVE-2021-45720?
Upgrade lru to 0.7.1 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-2021-45720 being exploited?
There is no known exploitation of CVE-2021-45720 in the wild and no public exploit code.
Sources
Also known as GHSA-qqmc-hwqp-8g2w, GHSA-v362-2895-h9r2, RUSTSEC-2021-0130.