RUSTSEC-2021-0017

Read on uninitialized buffer may cause UB (impl Walue for Vec<u8>)

Reported

January 30, 2021

Issued

January 31, 2021 (last modified: June 13, 2023)

Package

postscript (crates.io)

Type

Vulnerability

Categories

memory-exposure

Aliases

References

https://github.com/bodoni/postscript/issues/1

CVSS Score

7.5 HIGH

CVSS Details

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

CVSS Vector

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

Patched

>=0.14.0

Description

Affected versions of this crate passes an uninitialized buffer to a user-provided Read implementation.

Arbitrary Read implementations can read from the uninitialized buffer (memory exposure) and also can return incorrect number of bytes written to the buffer. Reading from uninitialized memory produces undefined values that can quickly invoke undefined behavior.

This flaw was fixed in commit 8026286 by zero-initializing the buffer before handing to a user-provided Read.

Advisory available under CC0-1.0 license.