CVE-2016-10931
HIGH8.1EPSS 0.18%SSL/TLS MitM vulnerability due to insecure defaults
Published: 8/25/2021Modified: 2/4/2026
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).
Affected packages (2)
- crates.io/opensslfrom 0, < 0.9.0
- crates.io/openssl>= 0.0.0-0, < 0.9.0
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | HIGH8.1 | CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H |