RUSTSEC-2021-0015

Sectors::get accesses unclaimed/uninitialized memory

Reported

January 6, 2021

Issued

January 30, 2021 (last modified: October 19, 2021)

Package

calamine (crates.io)

Type

Vulnerability

Categories

Aliases

CVE-2021-26951

Details

https://github.com/tafia/calamine/issues/199

CVSS Score

9.8 CRITICAL

CVSS Details

Attack vector: Network
Attack complexity: Low
Privileges required: None
User interaction: None
Scope: Unchanged
Confidentiality: High
Integrity: High
Availability: High

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Patched

>=0.17.0

Description

Affected versions of this crate arbitrarily calls Vec::set_len to increase length of a vector without claiming more memory for the vector. Affected versions of this crate also calls user-provided Read on the uninitialized memory of the vector that was extended with Vec::set_len.

This can overwrite active entities in adjacent heap memory and seems to be a major security issue. Also, calling user-provided Read on uninitialized memory is defined as UB in Rust.