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: 1.9

Type: local

Agent: windows

Published: 2015/11/10

Updated: 2018/11/15

Dependencies: 57033, 13855

Risk Information

Risk Factor: Medium

CVSS v2.0

Base Score: 5.8

Temporal Score: 4.3

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

Temporal Vector: CVSS2#E:U/RL:OF/RC:C

Vulnerability Information

CPE: cpe:/o:microsoft:windows

Required KB Items: SMB/MS_Bulletin_Checks/Possible

Exploit Available: false

Exploit Ease: No known exploits are available

Patch Publication Date: 2015/11/10

Vulnerability Publication Date: 2015/11/10

Reference Information

CVE: CVE-2015-6112

BID: 77484

MSFT: MS15-121

MSKB: 3081320

IAVA: 2015-A-0273