MS-ISAC CYBERSECURITY ADVISORIES
MS-ISAC ADVISORY NUMBER:
Multiple Vulnerabilities in Google Chrome Could Allow for Remote Code Execution
Multiple vulnerabilities have been identified in Mozilla Firefox and Firefox ESR, which could allow for arbitrary code execution. Mozilla Firefox is a web browser used to access the Internet. Mozilla Firefox ESR is a version of the web browser intended to be deployed in large organizations. Exploitation of these vulnerabilities could allow an attacker to bypass same-origin policy restrictions to access data, and execute arbitrary code in the context of the affected application.
There are currently no reports of these vulnerabilities being exploited in the wild.
· Google Chrome prior to 52.0.2743.116
· Large and medium government entities:High
· Small government entities: Medium
· Large and medium business entities:High
· Small business entities:Medium
Home users: Low
Multiple vulnerabilities have been discovered in Google Chrome, the most severe of which could result in remote code execution. These vulnerabilities can be exploited if a user visits, or is redirected to, a specially crafted web page. Details of the vulnerabilities are as follows:
· A heap-based buffer-overflow vulnerability that exists in pdfium. (CVE-2016-5139)
·A heap-based buffer-overflow vulnerability that exists in pdfium. (CVE-2016-5140)
·A security vulnerability exists due to address bar spoofing. (CVE-2016-5141)
· A use-after-free vulnerability exists due to an error in Extensions. (CVE-2016-5142)
·Vulnerabilities in DevTools because it fails to properly sanitize parameter. (CVE-2016-5143) (CVE-2016-5144)
· A security vulnerability that exists due to a same-origin bypass in Blink. (CVE-2016-5145)
· Multiple unspecified security vulnerabilities. (CVE-2016-5146)
Successful exploitation of these vulnerabilities could allow an attacker to execute remote code in the context of the browser, obtain sensitive information, bypass security restrictions, or cause denial-of-service conditions.
We recommend the following actions be taken:
· Apply appropriate patches provided by Google 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 from un-trusted sources.