Hello, welcome to this month's blog on the Microsoft patch release. This month the vendor is releasing seven bulletins covering a total of 24 vulnerabilities. Thirteen of this month's issues are rated ’Critical’.
As always, customers are advised to follow these security best practices:
- Install vendor patches as soon as they are available.
- Run all software with the least privileges required while still maintaining functionality.
- Avoid handling files from unknown or questionable sources.
- Never visit sites of unknown or questionable integrity.
- Block external access at the network perimeter to all key systems unless specific access is required.
Microsoft's summary of the December releases can be found here:
http://technet.microsoft.com/en-us/security/bulletin/ms14-dec
The following is a breakdown of the issues being addressed this month:
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MS14-075 Vulnerabilities in Microsoft Exchange Server Could Allow Security Feature Bypass (3009712)
Outlook Web Access Token Spoofing Vulnerability (CVE-2014-6319) MS Rating: Moderate
A token spoofing vulnerability exists in Exchange Server when Microsoft Outlook Web Access (OWA) fails to properly validate a request token.
OWA XSS Vulnerability (CVE-2014-6325) MS Rating: Important
An elevation of privilege vulnerability exists when Microsoft Exchange Server does not properly validate input. An attacker who successfully exploited this vulnerability could run script in the context of the current user.
OWA XSS Vulnerability (CVE-2014-6326) MS Rating: Important
An elevation of privilege vulnerability exists when Microsoft Exchange Server does not properly validate input. An attacker who successfully exploited this vulnerability could run script in the context of the current user.
Exchange URL Redirection Vulnerability (CVE-2014-6336) MS Rating: Important
A spoofing vulnerability exists in Microsoft Exchange when Microsoft Outlook Web Access (OWA) fails to properly validate redirection tokens.
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MS14-080 Cumulative Security Update for Internet Explorer (3008923)
Internet Explorer Memory Corruption Vulnerability (CVE-2014-6327) MS Rating: Critical
A remote code execution vulnerability exists when Internet Explorer improperly accesses an object in memory. This vulnerability may corrupt memory in such a way that an attacker could execute arbitrary code in the context of the current user.
Internet Explorer Memory Corruption Vulnerability (CVE-2014-6329) MS Rating: Critical
A remote code execution vulnerability exists when Internet Explorer improperly accesses an object in memory. This vulnerability may corrupt memory in such a way that an attacker could execute arbitrary code in the context of the current user.
Internet Explorer Memory Corruption Vulnerability (CVE-2014-6330) MS Rating: Critical
A remote code execution vulnerability exists when Internet Explorer improperly accesses an object in memory. This vulnerability may corrupt memory in such a way that an attacker could execute arbitrary code in the context of the current user.
Internet Explorer Memory Corruption Vulnerability (CVE-2014-6366) MS Rating: Critical
A remote code execution vulnerability exists when Internet Explorer improperly accesses an object in memory. This vulnerability may corrupt memory in such a way that an attacker could execute arbitrary code in the context of the current user.
Internet Explorer Memory Corruption Vulnerability (CVE-2014-6369) MS Rating: Critical
A remote code execution vulnerability exists when Internet Explorer improperly accesses an object in memory. This vulnerability may corrupt memory in such a way that an attacker could execute arbitrary code in the context of the current user.
Internet Explorer Memory Corruption Vulnerability (CVE-2014-6373) MS Rating: Critical
A remote code execution vulnerability exists when Internet Explorer improperly accesses an object in memory. This vulnerability may corrupt memory in such a way that an attacker could execute arbitrary code in the context of the current user.
Internet Explorer Memory Corruption Vulnerability (CVE-2014-6374) MS Rating: Critical
A remote code execution vulnerability exists when Internet Explorer improperly accesses an object in memory. This vulnerability may corrupt memory in such a way that an attacker could execute arbitrary code in the context of the current user.
Internet Explorer Memory Corruption Vulnerability (CVE-2014-6375) MS Rating: Critical
A remote code execution vulnerability exists when Internet Explorer improperly accesses an object in memory. This vulnerability may corrupt memory in such a way that an attacker could execute arbitrary code in the context of the current user.
Internet Explorer Memory Corruption Vulnerability (CVE-2014-6376) MS Rating: Critical
A remote code execution vulnerability exists when Internet Explorer improperly accesses an object in memory. This vulnerability may corrupt memory in such a way that an attacker could execute arbitrary code in the context of the current user.
Internet Explorer Memory Corruption Vulnerability (CVE-2014-8966) MS Rating: Critical
A remote code execution vulnerability exists when Internet Explorer improperly accesses an object in memory. This vulnerability may corrupt memory in such a way that an attacker could execute arbitrary code in the context of the current user.
XSS Filter Bypass Vulnerability in Internet Explorer (CVE-2014-6328) MS Rating: Important
An XSS filter bypass vulnerability exists in the way Internet Explorer disables an HTML attribute in otherwise appropriately filtered HTTP response data. This vulnerability could allow initially disabled scripts to run in the wrong security context, leading to information disclosure.
XSS Filter Bypass Vulnerability in Internet Explorer (CVE-2014-6365) MS Rating: Important
An XSS filter bypass vulnerability exists in the way Internet Explorer disables an HTML attribute in otherwise appropriately filtered HTTP response data. This vulnerability could allow initially disabled scripts to run in the wrong security context, leading to information disclosure.
Internet Explorer ASLR Bypass Vulnerability (CVE-2014-6368) MS Rating: Important
A security feature bypass vulnerability exists when Internet Explorer does not 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. This vulnerability could allow an attacker to bypass the Address Space Layout Randomization (ASLR) security feature.
VBScript Memory Corruption Vulnerability (CVE-2014-6363) MS Rating: Critical
A remote code execution vulnerability exists in the way that the VBScript engine, when rendered in Internet Explorer, handles objects in memory. The vulnerability may corrupt memory in such a way that an attacker could execute arbitrary code in the context of the current user.
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MS14-081 Vulnerabilities in Microsoft Word and Microsoft Office Web Apps Could Allow (3017301)
Index Remote Code Execution Vulnerability (CVE-2014-6356) MS Rating: Critical
A remote code execution vulnerability exists in the way that Microsoft Word does not properly handle objects in memory while parsing specially crafted Office files. System memory may be corrupted in such a way that an attacker could execute arbitrary code.
Use After Free Word Remote Code Execution Vulnerability (CVE-2014-6357) MS Rating: Critical
A remote code execution vulnerability exists in the way that Microsoft Word does not properly handle objects in memory while parsing specially crafted Office files. System memory may be corrupted in such a way that an attacker could execute arbitrary code.
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MS14-082 Vulnerabilities in Microsoft Office Could Allow Remote Code Execution (3017349)
Microsoft Office Component Use After Free Vulnerability (CVE-2014-6364) MS Rating: Important
A remote code execution vulnerability exists in the context of the current user that is caused when Microsoft Word does not properly handle objects in memory while parsing specially crafted Office files.
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MS14-083 Vulnerabilities in Microsoft Excel Could Allow Remote Code Execution (3017347)
Global Free Remote Code Execution in Excel Vulnerability (CVE-2014-6360) MS Rating: Important
A remote code execution vulnerability exists in the way that Microsoft Excel does not properly handle objects in memory while parsing specially crafted Office files. System memory may be corrupted in such a way that an attacker could execute arbitrary code.
Excel Invalid Pointer Remote Code Execution Vulnerability (CVE-2014-6361) MS Rating: Important
A remote code execution vulnerability exists in the way that Microsoft Excel does not properly handle objects in memory while parsing specially crafted Office files. System memory may be corrupted in such a way that an attacker could execute arbitrary code.
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MS14-084 Vulnerability in VBScript Scripting Engine Could Allow Remote Code Execution (3016711)
VBScript Memory Corruption Vulnerability (CVE-2014-6363) MS Rating: Critical
A remote code execution vulnerability exists in the way that the VBScript engine, when rendered in Internet Explorer, handles objects in memory. The vulnerability may corrupt memory in such a way that an attacker could execute arbitrary code in the context of the current user.
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MS14-085 Vulnerability in Microsoft Graphics Component Could Allow Information Disclosure (3013126)
Information Disclosure Vulnerability (CVE-2014-6355) MS Rating: Important
An information disclosure vulnerability exists in the Microsoft Graphics Component that could allow an attacker to more reliably predict the memory offsets of specific instructions in a given call stack. The vulnerability is caused when the Microsoft Graphics Component improperly handles the decoding of JPEG images in memory. An attacker could use this information disclosure vulnerability to gain information about the system that could then be combined with other attacks to compromise the system.
More information on the vulnerabilities being addressed this month is available at Symantec's free SecurityFocus portal and to our customers through the DeepSight Threat Management System.