Reported

January 6, 2021

Issued

January 30, 2021 (last modified: June 13, 2023)

Package

calamine (crates.io)

Type

Vulnerability

Categories

• memory-corruption
• memory-exposure

Aliases

• CVE-2021-26951
• GHSA-ppqp-78xx-3r38

References

• 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.

Advisory available under CC0-1.0 license.