MS-ISAC CYBERSECURITY ADVISORIES

MS-ISAC ADVISORY NUMBER:
2016-040

DATE(S) ISSUED:
03/08/2016

SUBJECT:
Cumulative Security Update for Microsoft Edge (MS16-024)

OVERVIEW:

Multiple vulnerabilities have been discovered in Microsoft Edge that could allow for remote code execution. Microsoft Edge replaced Internet Explorer as the default browser on Windows 10. Successful exploitation of these vulnerabilities could result in an attacker gaining the same privileges as the logged on user. Depending on the privileges associated with the user, an attacker could then install programs; view, change, or delete data; or create new accounts with full user rights.

 

THREAT INTELLIGENCE:

There are no reports of these vulnerabilities being exploited in the wild.

 

SYSTEM AFFECTED:

  • Microsoft Edge

 

RISK:

Government:

  • Large and medium government entities: High

  • Small government entities: Medium

Businesses:

  • Large and medium business entities: High

  • Small business entities: Medium

Home users: Low

 

TECHNICAL SUMMARY:

Multiple vulnerabilities have been discovered in Microsoft Edge that could allow for remote code execution.

  • Ten remote code execution vulnerabilities exist when Microsoft Edge improperly accesses objects in memory.These vulnerabilities could allow an attacker to execute arbitrary code in the context of the user by luring a victim to view a webpage containing malicious code.(CVE-2016-0102, CVE-2016-0105, CVE-2016-0109, CVE-2016-0110, CVE-2016-0111, CVE-2016-0116, CVE-2016-0123, CVE-2016-0124, CVE-2016-0129, CVE-2016-0130)

  • An informationdisclosurevulnerability exists in Microsoft Edge when the referrer policy is improperly handled.An attacker who successfully exploited the vulnerability could gain information about the request context or browsing history of a user.To exploit the vulnerability, an attacker must convince a victim who is accessing a secure website to click a link that takes the victim to a malicious website.(CVE-2016-0125)

Successful exploitation of these vulnerabilities could result in an attacker gaining the same privileges as the logged on user. Depending on the privileges associated with the user, an attacker could then install programs; view, change, or delete data; or create new accounts with full user rights.

 

RECOMMENDATIONS:

We recommend the following actions be taken:

  • Apply appropriate patches provided by Microsoft to vulnerable systems immediately after appropriate testing.

  • Run all software as a non-privileged user (one without administrative privileges) to diminish the effects of a successful attack.

  • Remind users not to visit un-trusted websites or follow links provided by unknown or un-trusted sources.

  • Inform and educate users regarding the threats posed by hypertext links contained in emails or attachments, especially those from un-trusted sources.

 

REFERENCES:

Microsoft:

https://technet.microsoft.com/en-us/library/security/ms16-024.aspx

 

CVE:

https://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-0102

https://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-0105

https://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-0109

https://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-0110

https://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-0111

https://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-0116

https://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-0123

https://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-0124

https://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-0125

https://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-0129

https://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-0130