MS15-121: Security Update for Schannel to Address Spoofing (3081320)

Medium Nessus Plugin ID 86827


The remote Windows host is affected by a spoofing vulnerability.


The remote Windows host is affected by a spoofing vulnerability due to a weakness in the Secure Channel (SChannel) TLS protocol implementation. A man-in-the-middle attacker can exploit this vulnerability to impersonate a victim on any other server that uses the same credentials as those used between the client and server where the attack is initiated.


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

See Also

Plugin Details

Severity: Medium

ID: 86827

File Name: smb_nt_ms15-121.nasl

Version: $Revision: 1.7 $

Type: local

Agent: windows

Published: 2015/11/10

Modified: 2017/07/24

Dependencies: 13855, 57033

Risk Information

Risk Factor: Medium


Base Score: 5.8

Temporal Score: 4.8

Vector: CVSS2#AV:N/AC:M/Au:N/C:P/I:P/A:N

Temporal Vector: CVSS2#E:F/RL:OF/RC:ND

Vulnerability Information

CPE: cpe:/o:microsoft:windows

Required KB Items: SMB/MS_Bulletin_Checks/Possible

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 2015/11/10

Vulnerability Publication Date: 2015/11/10

Reference Information

CVE: CVE-2015-6112

BID: 77484

OSVDB: 130064

MSFT: MS15-121

MSKB: 3081320

IAVA: 2015-A-0273