CVE-2017-8301 Security feature bypass in n/a
Attackers can bypass TLS certificate verification in LibreSSL when using specific callback configurations, allowing man-in-the-middle attacks.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2017-8301?
CVE-2017-8301 is a medium-severity vulnerability in n/a, published on 27 Apr 2017. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
LibreSSL 2.5.1 to 2.5.3 lacks TLS certificate verification if SSL_get_verify_result is relied upon for a later check of a verification result, in a use case where a user-provided verification callback returns 1, as demonstrated by acceptance of invalid certificates by nginx.
Weakness: CWE-295
Which versions are affected by CVE-2017-8301?
It affects 1 product.
Products include Openbsd Libressl.
How do I fix CVE-2017-8301?
Upgrade to a fixed version.
Is CVE-2017-8301 being exploited?
There is no known exploitation of CVE-2017-8301 in the wild and no public exploit code.
Other vulnerabilities in n/a
Sources
Also known as ALPINE-CVE-2017-8301, GHSA-phvv-c9gw-v54h.