HistoryEdit

RUSTSEC-2020-0080

miow invalidly assumes the memory layout of std::net::SocketAddr

Issued
Package
miow (crates.io)
Type
INFO Unsound
Keywords
#memory #layout #cast
Aliases
Details
https://github.com/yoshuawuyts/miow/issues/38
CVSS Score
5.5 MEDIUM
CVSS Details
Attack vector
Local
Attack complexity
Low
Privileges required
Low
User interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High
CVSS Vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Patched
  • ^0.2.2
  • >=0.3.6
Keywords
#memory #layout #cast

Description

The miow 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.