Main Vulnerability Database SB2016090203

SB2016090203 - Kerberos Security Feature Bypass Vulnerability

Published: September 2, 2016

Security Bulletin ID SB2016090203

Severity

Medium

Patch available

YES

Number of vulnerabilities 1

Exploitation vector Adjecent network

Highest impact Data manipulation

Breakdown by Severity

Low
Medium
High
Critical

Description

This security bulletin contains information about 1 security vulnerability.

1) Kerberos privilege escalation (CVE-ID: CVE-2016-3237)

The vulnerability allows an attacker with access to local network to gain elevated privileges.

The vulnerability exists in Kerberos implementation when handling password change request. A local attacker can make the operating system to fall back to NT LAN Manager (NTLM) Authentication Protocol as the default authentication protocol.

Successful exploitation of this vulnerability will allow a local attacker to launch a man-in-the-middle (MiTM) attack against the traffic passing between a domain controller and the target machine, intercept and decrypt credentials during password change request.

Remediation

Install update from vendor's website.

References

https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2016-3237