MS15-122: Security Update for Kerberos to Address Security Feature Bypass (3105256)

medium Nessus Plugin ID 86828
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The remote Windows host is affected by a security feature bypass vulnerability.


The remote Windows host is affected by a security feature bypass vulnerability in Kerberos due to a failure to check the password change of a user signing into a workstation. A remote attacker can exploit this vulnerability by connecting a workstation to a malicious Kerberos Key Distribution Center (KDC), resulting in the ability to decrypt drives protected by BitLocker.

Note that this vulnerability can only be exploited if the target system has BitLocker enabled without a PIN or USB key, and the computer is domain-joined.


Microsoft has released a set of patches for Windows Vista, 2008, 7, 2008 R2, 8, RT, 2012, 8.1, RT 8.1, 2012 R2, and 10.

See Also

Plugin Details

Severity: Medium

ID: 86828

File Name: smb_nt_ms15-122.nasl

Version: 1.11

Type: local

Agent: windows

Published: 11/10/2015

Updated: 6/4/2021

Dependencies: smb_hotfixes.nasl, ms_bulletin_checks_possible.nasl

Risk Information

CVSS Score Source: CVE-2015-6095


Risk Factor: Medium

Score: 4


Risk Factor: Medium

Base Score: 4.9

Temporal Score: 3.6

Vector: AV:L/AC:L/Au:N/C:N/I:C/A:N

Temporal Vector: E:U/RL:OF/RC:C

Vulnerability Information

CPE: cpe:/o:microsoft:windows

Required KB Items: SMB/MS_Bulletin_Checks/Possible

Exploit Ease: No known exploits are available

Patch Publication Date: 11/10/2015

Vulnerability Publication Date: 11/10/2015

Reference Information

CVE: CVE-2015-6095

BID: 77475

MSFT: MS15-122

MSKB: 3101246, 3105213, 3105211

IAVA: 2015-A-0278