SB2016090203 - Kerberos Security Feature Bypass Vulnerability

CSH
CYBERSECURITY HELP
Sign In REGISTER

Main Vulnerability Database SB2016090203

SB2016090203 - Kerberos Security Feature Bypass Vulnerability

Published: September 2, 2016

Security Bulletin ID SB2016090203
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Adjecent network
Highest impact Data manipulation

Breakdown by Severity

Medium 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


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

CWE-ID: CWE-255 - Credentials Management

CVSSv4: CVSS:4.0/AV:A/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P/U:Green


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