CVE-2021-38187

An issue was discovered in the anymap crate through 0.12.1 for Rust

published August 8, 2021

CVSS
—
EPSS
1%
Percentile
73.0
In the wild
Unconfirmed
What it is

💡 A sneaky type conversion error in the anymap crate could lead to unexpected behavior, like trying to fit a tiny puzzle piece into a much bigger space! Think of it like trying to fit a small kiddie pool into a large backyard — the size mismatch can create all sorts of chaos and confusion! In the same way, this vulnerability involves converting a *u8 to a *u64, where assumptions about size might not hold up. The consequences of this could lead to unstable behavior in applications using the anymap crate, potentially resulting in crashes or unexpected data handling. While there's no known exploitation, it could still manifest in surprising ways, affecting your program's reliability.

Put simply

Think of it like trying to fit a small kiddie pool into a large backyard — the size mismatch can create all sorts of chaos and confusion! In the same way, this vulnerability involves converting a *u8 to a *u64, where assumptions about size might not hold up. This vulnerability in the anymap crate allows for an unsafe type conversion, violating Rust's soundness guarantees. Specifically, it improperly converts a pointer type from *u8 to *u64, which can lead to undefined behavior and memory issues.

What to do

The consequences of this could lead to unstable behavior in applications using the anymap crate, potentially resulting in crashes or unexpected data handling. While there's no known exploitation, it could still manifest in surprising ways, affecting your program's reliability. Developers using the anymap crate should upgrade to the latest version where this issue is patched. Review your code for any potential impacts from this type conversion and consider adding additional checks to ensure safe type handling. You’ve got this! Stay vigilant and keep your code safe with a quick upgrade! 🛡️

The record
Technical detail
CVSS
Not scored
CVSS v4.0
Not supplied
EPSS
0.01441 · 73.0th percentile
Published
2021-08-08T05:10Z
EPSS history
Timeline
  • 08 AUG 05:10Z
    An issue was discovered in the anymap crate through 0.12.1 for Rust
    cvelistv5