LibreSSL CVE-2017-8301 Certificate Validation Security Bypass Vulnerability

Bugtraq ID:	98076
Class:	Design Error
CVE:	CVE-2017-8301
Remote:	Yes
Local:	No
Published:	Apr 25 2017 12:00AM
Updated:	May 02 2017 12:11AM
Credit:	jirutka
Vulnerable:	LibreSSL libreSSL 2.5.3 LibreSSL libreSSL 2.5.2 LibreSSL libreSSL 2.5.1
Not Vulnerable:

LibreSSL CVE-2017-8301 Certificate Validation Security Bypass Vulnerability

LibreSSL is prone to a security-bypass vulnerability.

Successfully exploiting this issue allows attackers to perform man-in-the-middle attacks or impersonate trusted servers, which will aid in further attacks.

LibreSSL version 2.5.1 through 2.5.3 are vulnerable.

LibreSSL CVE-2017-8301 Certificate Validation Security Bypass Vulnerability

Currently, we are not aware of any working exploits. If you feel we are in error or if you are aware of more recent information, please mail us at: [email protected].

LibreSSL CVE-2017-8301 Certificate Validation Security Bypass Vulnerability

Solution:
Updates are available. Please see the references or vendor advisory for more information.

LibreSSL CVE-2017-8301 Certificate Validation Security Bypass Vulnerability

References:

• LibreSSL HomePage (LibreSSL)
  
• Some nginx TLS tests started failing with LibreSSL 2.5.3 (nginx)
  
• Some nginx TLS tests started failing with LibreSSL 2.5.3 (but not with 2.4.4) #3 (GitHub)