Reported

April 27, 2022

Issued

April 27, 2022 (last modified: June 13, 2023)

Package

array-macro (crates.io)

Type

INFO Unsound

Categories

• code-execution
• memory-corruption
• memory-exposure

Aliases

• GHSA-7v4j-8wvr-v55r

References

• https://gitlab.com/KonradBorowski/array-macro/-/issues/5

Patched

• >=2.1.2

Unaffected

• <2.1.0

Description

Affected versions of this crate did substitute the array length provided by an user at compile-time multiple times.

When an impure constant expression is passed as an array length (such as a result of an impure procedural macro), this can result in the initialization of an array with uninitialized types, which in turn can allow an attacker to execute arbitrary code.

The flaw was corrected in commit d5b63f72 by making sure that array length is substituted just once.

Advisory available under CC0-1.0 license.