RUSTSEC-2021-0021

nb-connect invalidly assumes the memory layout of std::net::SocketAddr

Reported

February 14, 2021

Issued

February 14, 2021 (last modified: June 13, 2023)

Package

nb-connect (crates.io)

Type

INFO Unsound

Keywords

#memory #layout #cast

Aliases

References

https://github.com/smol-rs/nb-connect/issues/1

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

>=1.0.3

Description

The nb-connect crate has assumed std::net::SocketAddrV4 and std::net::SocketAddrV6 have the same memory layout as the system C representation sockaddr. It has simply casted the pointers to convert the socket addresses to the system representation. The standard library does not say anything about the memory layout, and this will cause invalid memory access if the standard library changes the implementation. No warnings or errors will be emitted once the change happens.

Advisory available under CC0-1.0 license.