Microsoft Security Bulletin MS15-043 - Critical
Cumulative Security Update for Internet Explorer (3049563)
Published: May 12, 2015
Version: 1.0
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 these 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 6 (IE 6), 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 6 (IE 6), 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:
- Modifying how Internet Explorer handles objects in memory
- Helping to ensure that affected versions of JScript and VBScript and Internet Explorer properly implement the ASLR security feature
- Adding additional permission validations to Internet Explorer
- Helping to prevent information stored in a user’s clipboard from being accessed by a malicious site
For more information about the vulnerabilities, see the Vulnerability Information section.
For more information about this update, see Microsoft Knowledge Base Article 3049563.
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
**Operating System** | **Component** | **Maximum Security Impact** | **Aggregate Severity Rating** | **Updates Replaced** |
**Internet Explorer 6** | ||||
Windows Server 2003 Service Pack 2 | [Internet Explorer 6](https://www.microsoft.com/download/details.aspx?familyid=e9780d19-d5d1-4842-9be5-5de60a600748) (3049563) | Remote Code Execution | Moderate | 3038314 in [MS15-032](http://go.microsoft.com/fwlink/?linkid=532626) |
Windows Server 2003 x64 Edition Service Pack 2 | [Internet Explorer 6](https://www.microsoft.com/download/details.aspx?familyid=e199e443-eacc-4710-8d65-1986dc389720) (3049563) | Remote Code Execution | Moderate | 3038314 in [MS15-032](http://go.microsoft.com/fwlink/?linkid=532626) |
Windows Server 2003 with SP2 for Itanium-based Systems | [Internet Explorer 6](https://www.microsoft.com/download/details.aspx?familyid=5ee1bab4-51bb-44f0-b9a8-e657c5028a18) (3049563) | Remote Code Execution | Moderate | 3038314 in [MS15-032](http://go.microsoft.com/fwlink/?linkid=532626) |
**Internet Explorer 7** | ||||
Windows Server 2003 Service Pack 2 | [Internet Explorer 7](https://www.microsoft.com/download/details.aspx?familyid=0d4bf7c2-1e6a-4832-9ed0-d0fd4a0325ea) (3049563) | Remote Code Execution | Moderate | 3038314 in [MS15-032](http://go.microsoft.com/fwlink/?linkid=532626) |
Windows Server 2003 x64 Edition Service Pack 2 | [Internet Explorer 7](https://www.microsoft.com/download/details.aspx?familyid=61baeb31-54fa-47c4-9dd4-90496ba16897) (3049563) | Remote Code Execution | Moderate | 3038314 in [MS15-032](http://go.microsoft.com/fwlink/?linkid=532626) |
Windows Server 2003 with SP2 for Itanium-based Systems | [Internet Explorer 7](https://www.microsoft.com/download/details.aspx?familyid=7eca1bed-0749-488d-9b72-790a6427993c) (3049563) | Remote Code Execution | Moderate | 3038314 in [MS15-032](http://go.microsoft.com/fwlink/?linkid=532626) |
Windows Vista Service Pack 2 | [Internet Explorer 7](https://www.microsoft.com/download/details.aspx?familyid=cbc4c381-31bc-4767-91ca-74945f40df88) (3049563) | Remote Code Execution | Critical | 3038314 in [MS15-032](http://go.microsoft.com/fwlink/?linkid=532626) |
Windows Vista x64 Edition Service Pack 2 | [Internet Explorer 7](https://www.microsoft.com/download/details.aspx?familyid=a0cbeb42-6f97-44f8-a91c-27c8dc174095) (3049563) | Remote Code Execution | Critical | 3038314 in [MS15-032](http://go.microsoft.com/fwlink/?linkid=532626) |
Windows Server 2008 for 32-bit Systems Service Pack 2 | [Internet Explorer 7](https://www.microsoft.com/download/details.aspx?familyid=0c30433b-dbca-469a-b63b-0990da215650) (3049563) | Remote Code Execution | Moderate | 3038314 in [MS15-032](http://go.microsoft.com/fwlink/?linkid=532626) |
Windows Server 2008 for x64-based Systems Service Pack 2 | [Internet Explorer 7](https://www.microsoft.com/download/details.aspx?familyid=63d11a5e-8151-424d-8b11-db39b63a0db7) (3049563) | Remote Code Execution | Moderate | 3038314 in [MS15-032](http://go.microsoft.com/fwlink/?linkid=532626) |
Windows Server 2008 for Itanium-based Systems Service Pack 2 | [Internet Explorer 7](https://www.microsoft.com/download/details.aspx?familyid=df00d157-6dae-465a-aee1-0364e303c6e7) (3049563) | Remote Code Execution | Moderate | 3038314 in [MS15-032](http://go.microsoft.com/fwlink/?linkid=532626) |
**Internet Explorer 8** | ||||
Windows Server 2003 Service Pack 2 | [Internet Explorer 8](https://www.microsoft.com/download/details.aspx?familyid=50f814f3-47fa-49db-96b5-196770c882b6) (3049563) | Remote Code Execution | Moderate | 3038314 in [MS15-032](http://go.microsoft.com/fwlink/?linkid=532626) |
Windows Server 2003 x64 Edition Service Pack 2 | [Internet Explorer 8](https://www.microsoft.com/download/details.aspx?familyid=9ea37147-d9e8-433f-92a5-97564a09f44b) (3049563) | Remote Code Execution | Moderate | 3038314 in [MS15-032](http://go.microsoft.com/fwlink/?linkid=532626) |
Windows Vista Service Pack 2 | [Internet Explorer 8](https://www.microsoft.com/download/details.aspx?familyid=62e3077f-e34b-4d60-b2dd-4dfee59be669) (3049563) | Remote Code Execution | Critical | 3038314 in [MS15-032](http://go.microsoft.com/fwlink/?linkid=532626) |
Windows Vista x64 Edition Service Pack 2 | [Internet Explorer 8](https://www.microsoft.com/download/details.aspx?familyid=15184e17-9469-4753-92f6-e8a9f6ff5d0f) (3049563) | Remote Code Execution | Critical | 3038314 in [MS15-032](http://go.microsoft.com/fwlink/?linkid=532626) |
Windows Server 2008 for 32-bit Systems Service Pack 2 | [Internet Explorer 8](https://www.microsoft.com/download/details.aspx?familyid=ac78c1aa-f644-465b-be41-7821bf101471) (3049563) | Remote Code Execution | Moderate | 3038314 in [MS15-032](http://go.microsoft.com/fwlink/?linkid=532626) |
Windows Server 2008 for x64-based Systems Service Pack 2 | [Internet Explorer 8](https://www.microsoft.com/download/details.aspx?familyid=b51c00f1-7aeb-480b-94ec-1be11b6889d4) (3049563) | Remote Code Execution | Moderate | 3038314 in [MS15-032](http://go.microsoft.com/fwlink/?linkid=532626) |
Windows 7 for 32-bit Systems Service Pack 1 | [Internet Explorer 8](https://www.microsoft.com/download/details.aspx?familyid=0b48d534-9cb1-41bf-8045-3761ea184bb3) (3049563) | Remote Code Execution | Critical | 3038314 in [MS15-032](http://go.microsoft.com/fwlink/?linkid=532626) |
Windows 7 for x64-based Systems Service Pack 1 | [Internet Explorer 8](https://www.microsoft.com/download/details.aspx?familyid=1a80951d-f78f-4250-9390-5af05a66da65) (3049563) | Remote Code Execution | Critical | 3038314 in [MS15-032](http://go.microsoft.com/fwlink/?linkid=532626) |
Windows Server 2008 R2 for x64-based Systems Service Pack 1 | [Internet Explorer 8](https://www.microsoft.com/download/details.aspx?familyid=7b3735b1-7f1c-479b-94f6-4eae3747d6f2) (3049563) | Remote Code Execution | Moderate | 3038314 in [MS15-032](http://go.microsoft.com/fwlink/?linkid=532626) |
Windows Server 2008 R2 for Itanium-based Systems Service Pack 1 | [Internet Explorer 8](https://www.microsoft.com/download/details.aspx?familyid=5b2402e8-5003-4d7c-b2f6-e6a9d90fdd59) (3049563) | Remote Code Execution | Moderate | 3038314 in [MS15-032](http://go.microsoft.com/fwlink/?linkid=532626) |
**Internet Explorer 9** | ||||
Windows Vista Service Pack 2 | [Internet Explorer 9](https://www.microsoft.com/download/details.aspx?familyid=2cb0ac05-2bc1-464f-bdb4-13e56173bede) (3049563) | Remote Code Execution | Critical | 3038314 in [MS15-032](http://go.microsoft.com/fwlink/?linkid=532626) |
Windows Vista x64 Edition Service Pack 2 | [Internet Explorer 9](https://www.microsoft.com/download/details.aspx?familyid=93d15ddb-ac6a-4ec5-8785-3f7864f3e582) (3049563) | Remote Code Execution | Critical | 3038314 in [MS15-032](http://go.microsoft.com/fwlink/?linkid=532626) |
Windows Server 2008 for 32-bit Systems Service Pack 2 | [Internet Explorer 9](https://www.microsoft.com/download/details.aspx?familyid=4ccfb938-ecb9-46a5-b20c-b4a2089190d1) (3049563) | Remote Code Execution | Moderate | 3038314 in [MS15-032](http://go.microsoft.com/fwlink/?linkid=532626) |
Windows Server 2008 for x64-based Systems Service Pack 2 | [Internet Explorer 9](https://www.microsoft.com/download/details.aspx?familyid=60be4da9-edb2-408d-b6e4-04b62264a84f) (3049563) | Remote Code Execution | Moderate | 3038314 in [MS15-032](http://go.microsoft.com/fwlink/?linkid=532626) |
Windows 7 for 32-bit Systems Service Pack 1 | [Internet Explorer 9](https://www.microsoft.com/download/details.aspx?familyid=5d167df9-7c74-4a9a-a444-b00ca3b8608f) (3049563) | Remote Code Execution | Critical | 3038314 in [MS15-032](http://go.microsoft.com/fwlink/?linkid=532626) |
Windows 7 for x64-based Systems Service Pack 1 | [Internet Explorer 9](https://www.microsoft.com/download/details.aspx?familyid=d9e24689-48da-429c-a827-88d7f1928848) (3049563) | Remote Code Execution | Critical | 3038314 in [MS15-032](http://go.microsoft.com/fwlink/?linkid=532626) |
Windows Server 2008 R2 for x64-based Systems Service Pack 1 | [Internet Explorer 9](https://www.microsoft.com/download/details.aspx?familyid=8132af88-1035-446b-9356-3aea5c4c8a6d) (3049563) | Remote Code Execution | Moderate | 3038314 in [MS15-032](http://go.microsoft.com/fwlink/?linkid=532626) |
**Internet Explorer 10** | ||||
Windows 7 for 32-bit Systems Service Pack 1 | [Internet Explorer 10](https://www.microsoft.com/download/details.aspx?familyid=4ad23b75-75f4-483e-b401-5cb2952ff692) (3049563) | Remote Code Execution | Critical | 3038314 in [MS15-032](http://go.microsoft.com/fwlink/?linkid=532626) |
Windows 7 for x64-based Systems Service Pack 1 | [Internet Explorer 10](https://www.microsoft.com/download/details.aspx?familyid=0055f441-675d-4919-8bec-d12b91839131) (3049563) | Remote Code Execution | Critical | 3038314 in [MS15-032](http://go.microsoft.com/fwlink/?linkid=532626) |
Windows Server 2008 R2 for x64-based Systems Service Pack 1 | [Internet Explorer 10](https://www.microsoft.com/download/details.aspx?familyid=4ff3d26e-7285-45fb-bbaa-9577fbf9c412) (3049563) | Remote Code Execution | Moderate | 3038314 in [MS15-032](http://go.microsoft.com/fwlink/?linkid=532626) |
Windows 8 for 32-bit Systems | [Internet Explorer 10](https://www.microsoft.com/download/details.aspx?familyid=544bbfed-1cb3-4fd3-bd5e-c5caf5b41f6d) (3049563) | Remote Code Execution | Critical | 3038314 in [MS15-032](http://go.microsoft.com/fwlink/?linkid=532626) |
Windows 8 for x64-based Systems | [Internet Explorer 10](https://www.microsoft.com/download/details.aspx?familyid=5e6338fb-3d5b-4345-b696-33094d6727cc) (3049563) | Remote Code Execution | Critical | 3038314 in [MS15-032](http://go.microsoft.com/fwlink/?linkid=532626) |
Windows Server 2012 | [Internet Explorer 10](https://www.microsoft.com/download/details.aspx?familyid=0da7cb29-3039-48b7-bd04-6add337b2f9d) (3049563) | Remote Code Execution | Moderate | 3038314 in [MS15-032](http://go.microsoft.com/fwlink/?linkid=532626) |
Windows RT | Internet Explorer 10[1] (3049563) | Remote Code Execution | Critical | 3038314 in [MS15-032](http://go.microsoft.com/fwlink/?linkid=532626) |
**Internet Explorer 11** | ||||
Windows 7 for 32-bit Systems Service Pack 1 | [Internet Explorer 11](https://www.microsoft.com/download/details.aspx?familyid=b569b55d-d154-430c-9f61-53619c701065) (3049563) | Remote Code Execution | Critical | 3038314 in [MS15-032](http://go.microsoft.com/fwlink/?linkid=532626) |
Windows 7 for x64-based Systems Service Pack 1 | [Internet Explorer 11](https://www.microsoft.com/download/details.aspx?familyid=7b55d694-f7b7-47dd-a02d-6d32c3bee1e7) (3049563) | Remote Code Execution | Critical | 3038314 in [MS15-032](http://go.microsoft.com/fwlink/?linkid=532626) |
Windows Server 2008 R2 for x64-based Systems Service Pack 1 | [Internet Explorer 11](https://www.microsoft.com/download/details.aspx?familyid=b1044031-0c09-4c23-a904-c79a827e769f) (3049563) | Remote Code Execution | Moderate | 3038314 in [MS15-032](http://go.microsoft.com/fwlink/?linkid=532626) |
Windows 8.1 for 32-bit Systems | [Internet Explorer 11](https://www.microsoft.com/download/details.aspx?familyid=73cbd59d-2556-479e-80b8-6b6fa8ea0f43) (3049563) | Remote Code Execution | Critical | 3038314 in [MS15-032](http://go.microsoft.com/fwlink/?linkid=532626) |
Windows 8.1 for x64-based Systems | [Internet Explorer 11](https://www.microsoft.com/download/details.aspx?familyid=1eae9b2a-811b-47b2-9e44-94a081b3a316) (3049563) | Remote Code Execution | Critical | 3038314 in [MS15-032](http://go.microsoft.com/fwlink/?linkid=532626) |
Windows Server 2012 R2 | [Internet Explorer 11](https://www.microsoft.com/download/details.aspx?familyid=afca86bb-86d6-4054-af74-24638f37a75c) (3049563) | Remote Code Execution | Moderate | 3038314 in [MS15-032](http://go.microsoft.com/fwlink/?linkid=532626) |
Windows RT 8.1 | Internet Explorer 11[1] (3049563) | Remote Code Execution | Critical | 3038314 in [MS15-032](http://go.microsoft.com/fwlink/?linkid=532626) |
Note Windows Technical Preview and Windows Server Technical Preview are affected. Customers running these operating systems are encouraged to apply the update, which is available via Windows Update.
Update FAQ
For addressing CVE-2015-1684 and CVE-2015-1686, what updates apply to my system?
CVE-2015-1684 is a vulnerability in the VBScript engine and CVE-2015-1686 is a vulnerability in the JScript and VBScript engines. Although the attack vector is through Internet Explorer, the vulnerabilities are addressed by this update (3049563) 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 MS15-053.
The update that addresses CVE-2015-1684 and CVE-2015-1686 depends on the version of the JScript and VBScript scripting engines that are installed on your system. Consult the following table for update information.
Version | MS15-053 | MS15-043 |
JScript 5.6 and VBScript 5.6 (Internet Explorer 6) |
JScript 5.6 and VBScript 5.6 (3050946) |
Not applicable |
JScript 5.7 and VBScript 5.7 (Internet Explorer 6 and Internet Explorer 7) |
JScript 5.7 and VBScript 5.7 (3050945) |
Not applicable |
JScript 5.8 and VBScript 5.8 (Internet Explorer 8) |
JScript 5.8 and VBScript 5.8 (3050941) (Windows Server core installation on Windows Server 2008 R2 only) |
Internet Explorer 8 (3049563) |
JScript 5.8 and VBScript 5.8 (Internet Explorer 9) |
Not applicable | Internet Explorer 9 (3049563) |
JScript 5.8 and VBScript 5.8 (Internet Explorer 10) |
Not applicable | Internet Explorer 10 (3049563) |
JScript 5.8 and VBScript 5.8 (Internet Explorer 11) |
Not applicable | Internet Explorer 11 (3049563) |
Does this update contain any additional security-related changes to functionality?
In addition to the changes that are listed for the vulnerabilities described in this bulletin, this update includes defense-in-depth updates to help improve security-related features.
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 May 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:
Abbreviation | Maximum Impact |
---|---|
RCE | Remote Code Execution |
EoP | Elevation of Privilege |
ID | Information Disclosure |
SFB | Security Feature Bypass |
Vulnerability Severity Ratings and Impact | |||||||
---|---|---|---|---|---|---|---|
CVE number | Vulnerability Title | Internet Explorer 6 | Internet Explorer 7 | Internet Explorer 8 | Internet Explorer 9 | Internet Explorer 10 | Internet Explorer 11 |
CVE-2015-1658 | Internet Explorer Memory Corruption Vulnerability | Not applicable | Not applicable | Not applicable | Not applicable | Not applicable | Windows Clients: Critical / RCE Windows Servers: Moderate / RCE |
CVE-2015-1684 | VBScript ASLR Bypass | Not applicable | Not applicable | Windows Clients: Important / SFB Windows Servers: Low / SFB |
Windows Clients: Important / SFB Windows Servers: Low / SFB |
Windows Clients: Important / SFB Windows Servers: Low / SFB |
Windows Clients: Important / SFB Windows Servers: Low / SFB |
CVE-2015-1685 | Internet Explorer ASLR Bypass | Not applicable | Not applicable | Not applicable | Not applicable | Not applicable | Windows Clients: Important / SFB Windows Servers: Low / SFB |
CVE-2015-1686 | VBScript and JScript ASLR Bypass | Not applicable | Not applicable | Windows Clients: Important / SFB Windows Servers: Low / SFB |
Windows Clients: Important / SFB Windows Servers: Low / SFB |
Windows Clients: Important / SFB Windows Servers: Low / SFB |
Windows Clients: Important / SFB Windows Servers: Low / SFB |
CVE-2015-1688 | Internet Explorer Elevation of Privilege Vulnerability | Not applicable | Windows Clients: Important / EoP Windows Servers: Low / EoP[1] |
Windows Clients: Important / EoP Windows Servers: Low / EoP |
Windows Clients: Important / EoP Windows Servers: Low / EoP |
Windows Clients: Important / EoP Windows Servers: Low / EoP |
Windows Clients: Important / EoP Windows Servers: Low / EoP |
CVE-2015-1689 | Internet Explorer Memory Corruption Vulnerability | Not applicable | Not applicable | Not applicable | Windows Clients: Critical / RCE Windows Servers: Moderate / RCE |
Windows Clients: Critical / RCE Windows Servers: Moderate / RCE |
Windows Clients: Critical / RCE Windows Servers: Moderate / RCE |
CVE-2015-1691 | Internet Explorer Memory Corruption Vulnerability | Not applicable | Not applicable | Windows Clients: Critical / RCE Windows Servers: Moderate / RCE |
Windows Clients: Critical / RCE Windows Servers: Moderate / RCE |
Not applicable | Not applicable |
CVE-2015-1692 | Internet Explorer Clipboard Information Disclosure Vulnerability | Not applicable | Windows Clients: Important / ID Windows Servers: Low / ID |
Windows Clients: Important / ID Windows Servers: Low / ID |
Windows Clients: Important / ID Windows Servers: Low / ID |
Windows Clients: Important / ID Windows Servers: Low / ID |
Windows Clients: Important / ID Windows Servers: Low / ID |
CVE-2015-1694 | Internet Explorer Memory Corruption Vulnerability | Windows Clients: Critical / RCE Windows Servers: Moderate / RCE |
Windows Clients: Critical / RCE Windows Servers: Moderate / RCE |
Windows Clients: Critical / RCE Windows Servers: Moderate / RCE |
Windows Clients: Critical / RCE Windows Servers: Moderate / RCE |
Windows Clients: Critical / RCE Windows Servers: Moderate / RCE |
Windows Clients: Critical / RCE Windows Servers: Moderate / RCE |
CVE-2015-1703 | Internet Explorer Elevation of Privilege Vulnerability | Windows Clients: Important / EoP Windows Servers: Low / EoP |
Windows Clients: Important / EoP Windows Servers: Low / EoP |
Windows Clients: Important / EoP Windows Servers: Low / EoP |
Windows Clients: Important / EoP Windows Servers: Low / EoP |
Windows Clients: Important / EoP Windows Servers: Low / EoP |
Windows Clients: Important / EoP Windows Servers: Low / EoP |
CVE-2015-1704 | Internet Explorer Elevation of Privilege Vulnerability | Windows Clients: Important / EoP Windows Servers: Low / EoP |
Windows Clients: Important / EoP Windows Servers: Low / EoP |
Windows Clients: Important / EoP Windows Servers: Low / EoP |
Windows Clients: Important / EoP Windows Servers: Low / EoP |
Windows Clients: Important / EoP Windows Servers: Low / EoP |
Windows Clients: Important / EoP Windows Servers: Low / EoP |
CVE-2015-1705 | Internet Explorer Memory Corruption Vulnerability | Not applicable | Not applicable | Not applicable | Windows Clients: Critical / RCE Windows Servers: Moderate / RCE |
Windows Clients: Critical / RCE Windows Servers: Moderate / RCE |
Windows Clients: Critical / RCE Windows Servers: Moderate / RCE |
CVE-2015-1706 | Internet Explorer Memory Corruption Vulnerability | Not applicable | Not applicable | Not applicable | Not applicable | Not applicable | Windows Clients: Critical / RCE Windows Servers: Moderate / RCE |
CVE-2015-1708 | Internet Explorer Memory Corruption Vulnerability | Not applicable | Not applicable | Windows Clients: Critical / RCE Windows Servers: Moderate / RCE |
Windows Clients: Critical / RCE Windows Servers: Moderate / RCE |
Not applicable | Not applicable |
CVE-2015-1709 | Internet Explorer Memory Corruption Vulnerability | Not applicable | Not applicable | Windows Clients: Critical / RCE Windows Servers: Moderate / RCE |
Windows Clients: Critical / RCE Windows Servers: Moderate / RCE |
Windows Clients: Critical / RCE Windows Servers: Moderate / RCE |
Windows Clients: Critical / RCE Windows Servers: Moderate / RCE |
CVE-2015-1710 | Internet Explorer Memory Corruption Vulnerability | Windows Clients: Critical / RCE Windows Servers: Moderate / RCE |
Windows Clients: Critical / RCE Windows Servers: Moderate / RCE |
Windows Clients: Critical / RCE Windows Servers: Moderate / RCE |
Windows Clients: Critical / RCE Windows Servers: Moderate / RCE |
Windows Clients: Critical / RCE Windows Servers: Moderate / RCE |
Windows Clients: Critical / RCE Windows Servers: Moderate / RCE |
CVE-2015-1711 | Internet Explorer Memory Corruption Vulnerability | Not applicable | Not applicable | Not applicable | Not applicable | Not applicable | Windows Clients: Critical / RCE Windows Servers: Moderate / RCE |
CVE-2015-1712 | Internet Explorer Memory Corruption Vulnerability | Not applicable | Not applicable | Windows Clients: Critical / RCE Windows Servers: Moderate / RCE |
Windows Clients: Critical / RCE Windows Servers: Moderate / RCE |
Not applicable | Not applicable |
CVE-2015-1713 | Internet Explorer Elevation of Privilege Vulnerability | Not applicable | Not applicable | Not applicable | Not applicable | Not applicable | Windows Clients: Important / EoP Windows Servers: Low / EoP |
CVE-2015-1714 | Internet Explorer Memory Corruption Vulnerability | Not applicable | Not applicable | Not applicable | Not applicable | Windows Clients: Critical / RCE Windows Servers: Moderate / RCE |
Windows Clients: Critical / RCE Windows Servers: Moderate / RCE |
CVE-2015-1717 | Internet Explorer Memory Corruption Vulnerability | Not applicable | Not applicable | Not applicable | Not applicable | Not applicable | Windows Clients: Critical / RCE Windows Servers: Moderate / RCE |
CVE-2015-1718 | Internet Explorer Memory Corruption Vulnerability | Not applicable | Not applicable | Not applicable | Not applicable | Not applicable | Windows Clients: Critical / RCE Windows Servers: Moderate / RCE |
[1]Internet Explorer 7 installed on Windows Server 2003 is not affected by this vulnerability.
Vulnerability Information
VBScript ASLR Bypass - CVE-2015-1684
A security feature bypass exists when the VBScript engine fails to use the Address Space Layout Randomization (ASLR) security feature, allowing an attacker to more reliably predict the memory offsets of specific instructions in a given call stack. The security feature bypass by itself does not allow arbitrary code execution. However, an attacker could use the ASLR bypass in conjunction with another vulnerability, such as a remote code execution vulnerability, that could take advantage of the ASLR bypass to more reliably run arbitrary code on a target system.
In a web-browsing scenario, successful exploitation of an ASLR bypass requires that a user is logged on and running an affected version of Internet Explorer, and browses to a malicious website. Therefore, any systems where a web browser is used frequently, such as workstations or terminal servers, are at the most risk from ASLR bypasses. Servers could be at more risk if administrators allow users to browse and read email on servers. However, best practices strongly discourage allowing this.
The update addresses this ASLR bypass by helping to ensure that affected versions of VBScript properly implement the ASLR security feature. The following table contains links to the standard entry for each vulnerability in the Common Vulnerabilities and Exposures list:
Vulnerability title | CVE number | Publicly Disclosed | Exploited |
VBScript ASLR Bypass | CVE-2015-1684 | No | No |
```
cacls %windir%\syswow64\vbscript.dll /E /R everyone
```
VBScript and JScript ASLR Bypass - CVE-2015-1686
A security feature bypass exists when the JScript and VBScript engines fail to use the Address Space Layout Randomization (ASLR) security feature, allowing an attacker to more reliably predict the memory offsets of specific instructions in a given call stack. The security feature bypass by itself does not allow arbitrary code execution. However, an attacker could use the ASLR bypass in conjunction with another vulnerability, such as a remote code execution vulnerability, to more reliably run arbitrary code on a target system.
In a web-browsing scenario, successful exploitation of an ASLR bypass requires that a user is logged on and running an affected version of Internet Explorer, and browses to a malicious site. Therefore, any systems where a web browser is used frequently, such as workstations or terminal servers, are at the most risk from ASLR bypasses. Servers could be at more risk if administrators allow users to browse and read email on servers. However, best practices strongly discourage allowing this.
The update addresses this ASLR bypasses by helping to ensure that affected versions of JScript and VBScript properly implement the ASLR security feature. The following table contains links to the standard entry for each vulnerability in the Common Vulnerabilities and Exposures list:
Vulnerability title | CVE number | Publicly Disclosed | Exploited |
VBScript and JScript ASLR Bypass | CVE-2015-1686 | No | No |
Vulnerability title | CVE number | Publicly Disclosed | Exploited |
Internet Explorer ASLR Bypass | CVE-2015-1685 | No | No |
Vulnerability title | CVE number | Publicly Disclosed | Exploited |
Internet Explorer Elevation of Privilege Vulnerability | CVE-2015-1688 | No | No |
Internet Explorer Elevation of Privilege Vulnerability | CVE-2015-1703 | No | No |
Internet Explorer Elevation of Privilege Vulnerability | CVE-2015-1704 | No | No |
Internet Explorer Elevation of Privilege Vulnerability | CVE-2015-1713 | No | No |
Vulnerability title | CVE number | Publicly Disclosed | Exploited |
Internet Explorer Clipboard Information Disclosure Vulnerability | CVE-2015-1692 | No | No |
Vulnerability title | CVE number | Publicly Disclosed | Exploited |
Internet Explorer Memory Corruption Vulnerability | CVE-2015-1658 | No | No |
Internet Explorer Memory Corruption Vulnerability | CVE-2015-1689 | No | No |
Internet Explorer Memory Corruption Vulnerability | CVE-2015-1691 | No | No |
Internet Explorer Memory Corruption Vulnerability | CVE-2015-1694 | No | No |
Internet Explorer Memory Corruption Vulnerability | CVE-2015-1705 | No | No |
Internet Explorer Memory Corruption Vulnerability | CVE-2015-1706 | No | No |
Internet Explorer Memory Corruption Vulnerability | CVE-2015-1708 | No | No |
Internet Explorer Memory Corruption Vulnerability | CVE-2015-1709 | No | No |
Internet Explorer Memory Corruption Vulnerability | CVE-2015-1710 | No | No |
Internet Explorer Memory Corruption Vulnerability | CVE-2015-1711 | No | No |
Internet Explorer Memory Corruption Vulnerability | CVE-2015-1712 | No | No |
Internet Explorer Memory Corruption Vulnerability | CVE-2015-1714 | No | No |
Internet Explorer Memory Corruption Vulnerability | CVE-2015-1717 | No | No |
Internet Explorer Memory Corruption Vulnerability | CVE-2015-1718 | No | No |