KLA10694
Multiple vulnerabilities in Microsoft Windows

Multiple serious vulnerabilities have been found in Microsoft Windows. Malicious users can exploit these vulnerabilities to spoof user interface, cause denial of service, gain privileges, bypass security restrictions, execute arbitrary code or obtain sensitive information.

Below is a complete list of vulnerabilities

1. Improper memory objects access at Edge can be exploited remotely via a specially designed web content to bypass security restrictions or execute arbitrary code;
2. Improper ASLR (Address Space Layout Randomization) implementation at Edge can be exploited remotely via a specially designed web content to bypass security restrictions;
3. Improper memory objects handling at kernel can be exploited by logged in user via a specially designed application to gain privileges;
4. Improper memory addresses initialization at kermel can be exploited by logged in user via a specially designed application to bypass security restrictions and obtain sensitive information;
5. Improper handling of embedded fonts at Adobe Type Manager Library can be exploited remotely via a specially designed web content or document to execute arbitrary code;
6. Improper permissions validation at kernel can be exploited by logged in user via a specially designed application to bypass security restrictions;
7. Improper buffer handling at Network Driver Interface Standard can be exploited by logged in user via a specially designed application to gain privileges;
8. Lack of memory address verification at Winsock can be exploited by logged in user via a specially designed application to gain privileges;
9. Improper encryption negotiation handling at Internet Protocol Security can be exploited by remote user with valid credentials via a specially designed application to cause denial of service;
10. Weakness at supported versions of Transport Layer Security protocol can be exploited remotely via man-in-the-middle attack to spoof user impersonation;
11. Improper password change handling at Kerberos can be exploited via a login manipulations to bypass security restrictions;
12. An unknown vulnerability at Windows Journal can be exploited remotely via a specially designed Journal file to execute arbitrary code.

Technical details

Vulnerability (4) can lead to Kernel ASLR bypass.

Vulnerability (7) caused by not checking buffer size prior to copy memory into it.

Vulnerability (8) caused by not checking memory address validity before call.

To exploit (10) remote attacker must cause man-in-the-middle attack between client and legitimate server. By exploiting this vulnerability attacker can impersonate victim on any other server that uses credentials same with attacked.

Vulnerability (11) caused by failing to check the password change of a user signing into a workstation. By exploiting this vulnerability attacker can bypass Kerberos authentication and decrypt drives protected by BitLocker.

Vulnerability (12) has multiple described mitigations designed to prevent opening malicious log file. Short list placed further, for full description look at MS15-115 advisory. Mitigations: do not open suspicious .jnt files; remove .jnt file association; remove Windows Journal; deny access to Journal.exe.

Microsoft Windows 10
Microsoft Windows 10 Version 1511
Microsoft Windows Vista Service Pack 2
Microsoft Windows Server 2008 Service Pack 2
Microsoft Windows 7 Service Pack 1
Microsoft Windows Server 2008 R2 Service Pack 1
Microsoft Windows 8
Microsoft Windows 8.1
Microsoft Windows Server 2012
Microsoft Windows Server 2012 R2

Install necessary updates from the KB section, that are listed in your Windows Update (Windows Update usually can be accessed from the Control Panel)

CVE-2015-6064
CVE-2015-6113
CVE-2015-6078
CVE-2015-2478
CVE-2015-6088
CVE-2015-6098
CVE-2015-6097
CVE-2015-6073
CVE-2015-6100
CVE-2015-6112
CVE-2015-6111
CVE-2015-6109
CVE-2015-6104
CVE-2015-6103
CVE-2015-6102
CVE-2015-6101
CVE-2015-6095

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