RUSTSEC-2016-0001

SSL/TLS MitM vulnerability due to insecure defaults

Reported

November 5, 2016

Issued

October 1, 2020 (last modified: June 13, 2023)

Package

openssl (crates.io)

Type

Vulnerability

Keywords

#ssl #mitm

Aliases

References

https://github.com/sfackler/rust-openssl/releases/tag/v0.9.0

CVSS Score

8.1 HIGH

CVSS Details

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

CVSS Vector

CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Patched

>=0.9.0

Description

All versions of rust-openssl prior to 0.9.0 contained numerous insecure defaults including off-by-default certificate verification and no API to perform hostname verification.

Unless configured correctly by a developer, these defaults could allow an attacker to perform man-in-the-middle attacks.

The problem was addressed in newer versions by enabling certificate verification by default and exposing APIs to perform hostname verification. Use the SslConnector and SslAcceptor types to take advantage of these new features (as opposed to the lower-level SslContext type).

Advisory available under CC0-1.0 license.