CVE-2021-28877

TrustedRandomAaccess specialization composes incorrectly for nested iter::Zips

Reported

January 3, 2021

Issued

April 13, 2021

Package

std

Type

Vulnerability

Categories

memory-corruption

Details

https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-28877

Patched

>=1.51.0

Unaffected

<1.11.0

Description

In the standard library in Rust before 1.51.0, the Zip implementation calls __iterator_get_unchecked() for the same index more than once when nested. This bug can lead to a memory safety violation due to an unmet safety requirement for the TrustedRandomAccess trait.