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Multiple Vulnerabilities in Google Chrome Could Allow for Arbitrary Code Execution

MS-ISAC ADVISORY NUMBER:

2020-137

DATE(S) ISSUED:

10/07/2020

OVERVIEW:

Multiple vulnerabilities have been discovered in Google Chrome, the most severe of which could allow for arbitrary code execution. Google Chrome is a web browser used to access the Internet. Successful exploitation of the most severe of these vulnerabilities could allow an attacker to execute arbitrary code in the context of the browser. Depending on the privileges associated with the application, an attacker could view, change, or delete data. If this application has been configured to have fewer user rights on the system, exploitation of the most severe of these vulnerabilities could have less impact than if it was configured with administrative rights.

THREAT INTELLIGENCE:

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

SYSTEMS AFFECTED:

  • Google Chrome versions prior to 86.0.4240.75

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 allow for arbitrary 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 use-after-free vulnerability. Specifically, this issue exists in the 'payments' component. (CVE-2020-15967)
  • A use-after-free vulnerability. Specifically, this issue exists in the 'Blink' component. (CVE-2020-15968)
  • A use-after-free vulnerability. Specifically, this issue exists in the 'WebRTC' component. (CVE-2020-15969)
  • A use-after-free vulnerability. Specifically, this issue exists in the 'NFC' component. (CVE-2020-15970)
  • A use-after-free vulnerability. Specifically, this issue exists in the 'printing' component. (CVE-2020-15971)
  • A use-after-free vulnerability. Specifically, this issue exists in the 'audio' component. (CVE-2020-15972)
  • A use-after-free vulnerability. Specifically, this issue exists in the 'autofill' component. (CVE-2020-15990)
  • A use-after-free vulnerability. Specifically, this issue exists in the 'password manager' component. (CVE-2020-15991)
  • A security-bypass vulnerability that occurs due to insufficient policy enforcement. Specifically, this issue exists in the 'extensions'. (CVE-2020-15973)
  • An integer-overflow vulnerability. Specifically, this issue exists in the 'Blink' component. (CVE-2020-15974)
  • An integer-overflow vulnerability. Specifically, this issue exists in the 'SwiftShader' component. (CVE-2020-15975)
  • A use-after-free vulnerability. Specifically, this issue exists in the 'WebXR' component. (CVE-2020-15976)
  • A security vulnerability. Specifically, this issue occurs due to certain inappropriate implementation in networking. (CVE-2020-6557)
  • A security vulnerability because it fails to properly validate data. Specifically, this issue exists in the 'dialogs' component. (CVE-2020-15977)
  • A security vulnerability because it fails to properly validate data. Specifically, this issue exists in the 'navigation' component. (CVE-2020-15978)
  • A security vulnerability. Specifically, this issue occurs due to certain inappropriate implementation in the 'V8' component. (CVE-2020-15979)
  • A security-bypass vulnerability that occurs due to insufficient policy enforcement. Specifically, this issue exists in the 'Intents' component. (CVE-2020-15980)
  • A security vulnerability that occurs due to an out-of-bounds read error. Specifically, this issue exists in the 'audio' component. (CVE-2020-15981)
  • An information-disclosure vulnerability that occurs due to a side-channel information-leakage condition. Specifically, this issue exists in the 'cache' component. (CVE-2020-15982)
  • A security vulnerability because it fails to properly validate data. Specifically, this issue exists in the 'webUI' component. (CVE-2020-15983)
  • A security-bypass vulnerability that occurs due to insufficient policy enforcement. Specifically, this issue exists in the 'Omnibox' component. (CVE-2020-15984)
  • A security vulnerability. Specifically, this issue occurs due to certain inappropriate implementation in the 'Blink' component. (CVE-2020-15985)
  • An integer-overflow vulnerability. Specifically, this issue exists in the 'media' component. (CVE-2020-15986)
  • A use-after-free vulnerability. Specifically, this issue exists in the 'WebRTC' component. (CVE-2020-15987)
  • A security-bypass vulnerability that occurs due to insufficient policy enforcement. Specifically, this issue exists in the 'networking' component. (CVE-2020-15992)
  • A security-bypass vulnerability that occurs due to insufficient policy enforcement. Specifically, this issue exists in the 'downloads' component. (CVE-2020-15988)
  • An unspecified security vulnerability that exists in the 'PDFium' component. (CVE-2020-15989)

Successful exploitation of the most severe of these vulnerabilities could allow an attacker to execute arbitrary code in the context of the browser. Depending on the privileges associated with the application, an attacker could view, change, or delete data. If this application has been configured to have fewer user rights on the system, exploitation of the most severe of these vulnerabilities could have less impact than if it was configured with administrative rights.

RECOMMENDATIONS:

We recommend the following actions be taken:

  • Apply the 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:
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-15967 https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-15968 https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-15969 https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-15970 https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-15971 https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-15972 https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-15990 https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-15991 https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-15973 https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-15974 https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-15975 https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-15976 https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-6557 https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-15977 https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-15978 https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-15979 https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-15980 https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-15981 https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-15982 https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-15983 https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-15984 https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-15985 https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-15986 https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-15987 https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-15992 https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-15988 https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-15989

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