Microsoft Security Bulletin MS15-124 - Critical.; 30 minutes to read Contributors. In this article Cumulative Security Update for Internet Explorer (3116180). In Internet Explorer, click Tools. //*.update.microsoft.com Note: You might have to uncheck the Require server verification.
Cumulative Security Update for Internet Explorer (3116180)
Published: December 8, 2015 | Updated: December 16, 2015
Version: 1.1
Executive Summary
This security update resolves vulnerabilities in Internet Explorer. The most severe of the vulnerabilities could allow remote code execution if a user views a specially crafted webpage using Internet Explorer. An attacker who successfully exploited the vulnerabilities could gain the same user rights as the current user. Customers whose accounts are configured to have fewer user rights on the system could be less impacted than those who operate with administrative user rights.
This security update is rated Critical for Internet Explorer 7 (IE 7), Internet Explorer 8 (IE 8), Internet Explorer 9 (IE 9), Internet Explorer 10 (IE 10), and Internet Explorer 11 (IE 11) on affected Windows clients, and Moderate for Internet Explorer 7 (IE 7), Internet Explorer 8 (IE 8), Internet Explorer 9 (IE 9), Internet Explorer 10 (IE 10), and Internet Explorer 11 (IE 11) on affected Windows servers. For more information, see the Affected Software section.
The security update addresses the vulnerabilities by:
For more information about the vulnerabilities, see the Vulnerability Information section.
For more information about this update, see Microsoft Knowledge Base Article 3116180.
Affected Software
The following software versions or editions are affected. Versions or editions that are not listed are either past their support life cycle or are not affected. To determine the support life cycle for your software version or edition, see Microsoft Support Lifecycle.
Affected Software
[2]This update is available via Windows Update.
[3]Windows 10 updates are cumulative. In addition to containing non-security updates, they also contain all of the security fixes for all of the Windows 10-affected vulnerabilities shipping with the monthly security release. The updates are available via the Microsoft Update Catalog.
Note Windows Server Technical Preview 3 and Windows Server Technical Preview 4 are affected. Customers running these operating systems are encouraged to apply the update, which is available via Windows Update.
*The Updates Replaced column shows only the latest update in any chain of superseded updates. For a comprehensive list of updates replaced, go to the Microsoft Update Catalog, search for the update KB number, and then view update details (updates replaced information is provided on the Package Details tab).
Severity Ratings and Vulnerability Identifiers
The following severity ratings assume the potential maximum impact of the vulnerability. For information regarding the likelihood, within 30 days of this security bulletin's release, of the exploitability of the vulnerability in relation to its severity rating and security impact, please see the Exploitability Index in the December bulletin summary.
Where specified in the Severity Ratings and Impact table, Critical, Important, and Moderate values indicate severity ratings. For more information, see Security Bulletin Severity Rating System. Refer to the following key for the abbreviations used in the table to indicate maximum impact:
Update FAQ
Are there any further steps I need to carry out to be protected from the vulnerabilities described in this bulletin?
Yes. It is important to note that your system is not protected from CVE-2015-6161 unless you carry out the instructions included in the vulnerability information section for CVE-2015-6161. This bulletin, MS15-124, provides protections for this issue, but user interaction is required to enable them; the cumulative update does not enable the protections by default.
I am running Internet Explorer 11 on Windows 10. How do I protect my system from CVE-2015-6161?
Your system is affected by this ASLR bypass, but is not protected from it unless you do the following:
I am running a version of Internet Explorer on a version of Windows that was released prior to Windows 10. How do I protect my system from CVE-2015-6161?
Your system is affected by this ASLR bypass, but is not protected from it unless you do the following:
For my particular system and Internet Explorer configuration, which update addresses the vulnerabilities discussed in CVE-2015-6135 and CVE-2015-6136?
CVE-2015-6135 and CVE-2015-6136 are vulnerabilities in the VBScript engine. Although the attack vector is through Internet Explorer, these vulnerabilities are addressed by this update (3104002) only for systems running Internet Explorer 8, Internet Explorer 9, Internet Explorer 10, and Internet Explorer 11. For Internet Explorer 7 and earlier and for systems without Internet Explorer installed, the vulnerabilities are addressed by the update described in MS15-126.
The update that addresses CVE-2015-6135 and CVE-2015-6136 depends on the version of the VBScript scripting engine that is installed on your system. Consult the following table for update information.
Microsoft Internet ExplorerVulnerability Information ------------------------- Multiple Internet Explorer Memory Corruption Vulnerabilities ------------------------------------------------------------ Multiple remote code execution vulnerabilities exist when Internet Explorer improperly accesses objects in memory. These vulnerabilities could corrupt memory in such a way that an attacker could execute arbitrary code in the context of the current user. An attacker could host a specially crafted website that is designed to exploit these vulnerabilities through Internet Explorer, and then convince a user to view the website. The attacker could also take advantage of compromised websites and websites that accept or host user-provided content or advertisements by adding specially crafted content that could exploit the vulnerabilities. In all cases, however, an attacker would have no way to force users to view the attacker-controlled content. Instead, an attacker would have to convince users to take action, typically by way of enticement in an email or Instant Messenger message, or by getting them to open an attachment sent through email. An attacker who successfully exploited these vulnerabilities could gain the same user rights as the current user. If the current user is logged on with administrative user rights, an attacker who successfully exploited these vulnerabilities could take control of an affected system. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights. The update addresses the vulnerabilities by modifying how Internet Explorer handles objects in memory. The following table contains links to the standard entry for each vulnerability in the Common Vulnerabilities and Exposures list:
Scripting Engine Memory Corruption Vulnerability – CVE-2015-6136
A remote code execution vulnerability exists in the way that the VBScript engine renders when handling objects in memory in Internet Explorer. The vulnerability could corrupt memory in such a way that an attacker could execute arbitrary code in the context of the current user.
In a web-based attack scenario, an attacker could host a specially crafted website that is designed to exploit the vulnerability through Internet Explorer and then convince a user to view the website. An attacker could also embed an ActiveX control marked 'safe for initialization' in an application or Microsoft Office document that hosts the IE rendering engine. The attacker could also take advantage of compromised websites, and websites that accept or host user-provided content or advertisements. These websites could contain specially crafted content that could exploit the vulnerability.
An attacker who successfully exploited the vulnerability could gain the same user rights as the current user. If the current user is logged on with administrative user rights, an attacker who successfully exploited the vulnerability could take control of an affected system. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights.
The update addresses the vulnerability by modifying how the VBScript scripting engine handles objects in memory.
Microsoft received information about this vulnerability through coordinated vulnerability disclosure. At the time this security bulletin was originally issued, Microsoft was unaware of any attack attempting to exploit this vulnerability.
Mitigating Factors
Microsoft has not identified any mitigating factors for this vulnerability.
Workarounds
The following workarounds may be helpful in your situation:
Microsoft Browser Elevation of Privilege Vulnerability – CVE-2015-6139
An elevation of privilege vulnerability exists when Internet Explorer does not properly enforce content types. An attacker who successfully exploited the vulnerability could run arbitrary script with elevated privileges.
In a web-based attack scenario, an attacker could host a website that is used to attempt to exploit this vulnerability. In addition, compromised websites and websites that accept or host user-provided content could contain specially crafted content that could exploit this vulnerability. In all cases, however, an attacker would have no way to force users to view the attacker-controlled content. Instead, an attacker would have to convince users to take action. For example, an attacker could trick users into clicking a link that takes them to the attacker's site. An attacker who successfully exploited this vulnerability could elevate privileges in affected versions of Internet Explorer.
The update addresses the vulnerability by helping to ensure that Internet Explorer properly enforces content types. Microsoft received information about this vulnerability through coordinated vulnerability disclosure. At the time this security bulletin was originally issued, Microsoft was unaware of any attack attempting to exploit this vulnerability.
Mitigating Factors
Microsoft has not identified any mitigating factors for this vulnerability.
Workarounds
Microsoft has not identified any workarounds for this vulnerability.
Internet Explorer Information Disclosure Vulnerability - CVE-2015-6157
An information disclosure vulnerability exists when Internet Explorer improperly discloses the contents of its memory. An attacker who successfully exploited this vulnerability could provide the attacker with information to further compromise the user’s system.
In a web-based attack scenario, an attacker could host a website in an attempt to exploit this vulnerability. Additionally, compromised websites and websites that accept or host user-provided content could contain specially crafted content that could exploit this vulnerability. In all cases, however, an attacker would have no way to force users to view the attacker-controlled content. Instead, an attacker would have to convince users to take action. For example, an attacker could trick users into clicking a link that takes them to the attacker's site.
Epson printer driver download. The update addresses the vulnerability by changing the way certain functions handle objects in memory. Microsoft received information about the vulnerability through coordinated vulnerability disclosure. At the time this security bulletin was originally issued, Microsoft was unaware of any attack attempting to exploit this vulnerability.
Mitigating Factors
Microsoft has not identified any mitigating factors for this vulnerability.
WorkaroundsConnect To Microsoft Internet Explorer
Microsoft has not identified any workarounds for this vulnerability.
Internet Explorer ASLR Bypass – CVE-2015-6161
A security feature bypass for Internet Explorer exists as a result of how exceptions are handled when dispatching certain window messages, allowing an attacker to probe the layout of the address space and thereby bypassing Address Space Layout Randomization (ASLR). By itself, the ASLR bypass does not allow arbitrary code execution. However, an attacker could use this ASLR bypass in conjunction with another vulnerability, such as a remote code execution vulnerability, to run arbitrary code on a target system. Successful exploitation of the ASLR bypass requires a user to be logged on and running an affected version of Internet Explorer. The user would then need to browse to a malicious site.
The following table contains links to the standard entry for each vulnerability in the Common Vulnerabilities and Exposures list:
For x64-based operating systems:
See Microsoft Security Bulletin MS15-135 for the download links for update 3109094.
See Knowledge Base Article 3125869 for more information and the Microsoft easy fix.
Mitigating Factors
Microsoft has not identified any mitigating factors for this vulnerability.
Workarounds
Microsoft has not identified any workarounds for this vulnerability.
Internet Explorer PatchInternet Explorer XSS Filter Bypass Vulnerability – CVE-2015-6164
A security feature bypass vulnerability exists when Internet Explorer does not properly enforce cross-domain policies. The vulnerability could allow an attacker to access information from one domain and inject it into another domain.
In a web-based attack scenario, an attacker could host a website that is used to attempt to exploit this vulnerability. In addition, compromised websites and websites that accept or host user-provided content could contain specially crafted content that could exploit this vulnerability. In all cases, however, an attacker would have no way to force users to view the attacker-controlled content. Instead, an attacker would have to convince users to take action. For example, an attacker could trick users into clicking a link that takes them to the attacker's site. An attacker who successfully exploited this vulnerability could elevate privileges in affected versions of Internet Explorer.
The vulnerability by itself does not allow arbitrary code to be run. However, the vulnerability could be used in conjunction with another vulnerability (for example, a remote code execution vulnerability) that could take advantage of the elevated privileges when running arbitrary code. For example, an attacker could exploit another vulnerability to run arbitrary code through Internet Explorer, but due to the context in which processes are launched by Internet Explorer, the code might be restricted to run at a low integrity level (very limited permissions). However, an attacker could, in turn, exploit this vulnerability to cause the arbitrary code to run at a medium integrity level (permissions of the current user).
Microsoft Internet Explorer Update Free Download
The update addresses the vulnerability by helping to ensure that cross-domain policies are properly enforced in Internet Explorer. This vulnerability has been publicly disclosed. It has been assigned Common Vulnerability and Exposure number CVE-2015-6164. At the time this security bulletin was originally issued, Microsoft was unaware of any attack attempting to exploit this vulnerability.
Mitigating Factors
Microsoft has not identified any mitigating factors for this vulnerability.
Workarounds
Microsoft has not identified any workarounds for this vulnerability.
Security Update Deployment
For Security Update Deployment information see the Microsoft Knowledge Base article referenced here in the Executive Summary.
Acknowledgments
Microsoft recognizes the efforts of those in the security community who help us protect customers through coordinated vulnerability disclosure. See Acknowledgments for more information.
Internet Explorer Download Windows 10Disclaimer
The information provided in the Microsoft Knowledge Base is provided 'as is' without warranty of any kind. Microsoft disclaims all warranties, either express or implied, including the warranties of merchantability and fitness for a particular purpose. In no event shall Microsoft Corporation or its suppliers be liable for any damages whatsoever including direct, indirect, incidental, consequential, loss of business profits or special damages, even if Microsoft Corporation or its suppliers have been advised of the possibility of such damages. Some states do not allow the exclusion or limitation of liability for consequential or incidental damages so the foregoing limitation may not apply.
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