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Multiple Vulnerabilities in Google Chrome Could Allow for Arbitrary Code Execution

MS-ISAC ADVISORY NUMBER:

2018-043

DATE(S) ISSUED:

04/18/2018

OVERVIEW:

Multiple vulnerabilities have been discovered in Google Chrome, the most severe of which could result in arbitrary code execution. Google Chrome is a web browser used to access the Internet. These vulnerabilities can be exploited if a user visits, or is redirected to, a specially crafted web page. Successful exploitation of the most severe of these vulnerabilities could allow an attacker to execute arbitrary code in the context of the browser, obtain sensitive information, bypass security restrictions and perform unauthorized actions, or cause denial-of-service conditions.

THREAT INTELLIGENCE:

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

SYSTEMS AFFECTED:

  • Google Chrome prior to 66.0.3359.117

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 Google Chrome, the most severe of which could result in arbitrary code execution. These vulnerabilities can be exploited if a user visits, or is redirected to, a specially crafted web page. Details of these vulnerabilities are as follows:

  • Use after free in Disk Cache (CVE-2018-6085, CVE-2018-6086).
  • Use after free in WebAssembly (CVE-2018-6087).
  • Use after free in PDFium (CVE-2018-6088).
  • Same origin policy bypass in Service Worker (CVE-2018-6089).
  • Heap buffer overfin Skia (CVE-2018-6090).
  • Incorrect handling of plug-ins by Service Worker (CVE-2018-6091).
  • Integer overfin WebAssembly (CVE-2018-6092).
  • Same origin bypass in Service Worker (CVE-2018-6093).
  • Exploit hardening regression in Oilpan (CVE-2018-6094).
  • Lack of meaningful user interaction requirement before file upload (CVE-2018-6095).
  • Fullscreen UI spoof (CVE-2018-6096, CVE-2018-6097).
  • URL spoof in Omnibox (CVE-2018-6098, CVE-2018-6100, CVE-2018-6102, CVE-2018-6104, CVE-2018-6105, CVE-2018-6107, CVE-2018-6108).
  • CORS bypass in ServiceWorker (CVE-2018-6099).
  • Insufficient protection of remote debugging prototol in DevTools (CVE-2018-6101).
  • UI spoof in Permissions (CVE-2018-6103).
  • Incorrect handling of promises in V8 (CVE-2018-6106).
  • Incorrect handling of files by FileAPI (CVE-2018-6109).
  • Incorrect handling of plaintext files via file (CVE-2018-6110).
  • Heap-use-after-free in DevTools (CVE-2018-6111).
  • Incorrect URL handling in DevTools (CVE-2018-6112).
  • URL spoof in Navigation (CVE-2018-6113).
  • CSP bypass (CVE-2018-6114).
  • SmartScreen bypass in downloads (CVE-2018-6115).
  • Incorrect memory handling in WebAssembly (CVE-2018-6116).
  • Confusing autofill settings (CVE-2018-6117).
  • Incorrect use of Distributed Objects in Google Software Updater on MacOS (CVE-2018-6084).

Successful exploitation of the most severe of these vulnerabilities could allow an attacker to execute arbitrary code in the context of the browser, obtain sensitive information, bypass security restrictions and perform unauthorized actions, or cause denial-of-service conditions.

RECOMENDATIONS:

We recommend the following actions be taken:

  • Apply stable channel update 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.
  • Apply the Principle of Least Privilege to all systems and services.

REFERENCES:

CVE:
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-6084 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-6085 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-6086 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-6087 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-6088 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-6089 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-6090 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-6091 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-6092 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-6093 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-6094 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-6095 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-6096 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-6097 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-6098 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-6099 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-6100 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-6101 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-6102 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-6103 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-6104 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-6105 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-6106 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-6107 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-6108 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-6109 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-6110 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-6111 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-6112 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-6113 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-6114 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-6115 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-6116 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-6117

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