Use After Free Affecting smallvec package, versions <0.6.10
Snyk CVSS
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Test your applications- Snyk ID SNYK-RUST-SMALLVEC-451501
- published 3 Jul 2019
- disclosed 6 Jun 2019
- credit Eric Huss
How to fix?
Upgrade smallvec to version 0.6.10 or higher.
Overview
smallvec is a "Small vector" optimization for Rust: store up to a small number of items on the stack.
Affected versions of this package are vulnerable to Use After Free in SmallVec::grow(). Attempting to call grow with a value equal to the current capacity causes it to free the existing data. This performs a double free immediately and may lead to use-after-free on subsequent accesses to the SmallVec contents. An attacker that controls the value passed to grow may exploit this flaw to obtain memory contents or gain remote code execution.