RUSTSEC-2016-0001

    Dashboard / Vulnerabilities / RUSTSEC-2016-0001

    RUSTSEC-2016-0001

    Published: 5 Nov 2016Last Modified: 4 Feb 2026

    Summary: SSL/TLS MitM vulnerability due to insecure defaults

    Details: 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).

    References: https://crates.io/crates/openssl, https://rustsec.org/advisories/RUSTSEC-2016-0001.html, https://github.com/sfackler/rust-openssl/releases/tag/v0.9.0

    Affected packages

    Package

    Name: openssl

    Purl: pkg:cargo/openssl

    Affected ranges

    Type: SEMVER

    Events:

    Introduced- 0.0.0-0
    Fixed -0.9.0

    Affected versions

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High