HistoryEdit

RUSTSEC-2020-0078

net2 invalidly assumes the memory layout of std::net::SocketAddr

Issued
Package
net2 (crates.io)
Type
INFO Unsound
Keywords
#memory #layout #cast
Aliases
Details
https://github.com/deprecrated/net2-rs/issues/105
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
  • >=0.2.36
Keywords
#memory #layout #cast

Description

The net2 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.