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Ubuntu 16.04 LTS: USN-4637-2 Critical: Firefox Code Exploit

ubuntu
Calendar Grey November 19, 2020
Dist Ubuntu Esm H88
An essential patch for Ubuntu mitigates weaknesses in Firefox, stopping system failures and unauthorized script runs.
Firefox could be made to crash or run programs as your login if it opened a malicious website.

Summary

Firefox could be made to crash or run programs as your login if it

opened a malicious website.

Software Description:

- firefox: Mozilla Open Source web browser

Details:

USN-4637-1 fixed vulnerabilities in Firefox. This update provides the

corresponding updates for Ubuntu 16.04 LTS.

Original advisory details:

Multiple security issues were discovered in Firefox. If a user were

tricked in to opening a specially crafted website, an attacker could

potentially exploit these to cause a denial of service, obtain sensitive

information across origins, bypass security restrictions, conduct phishing

attacks, conduct cross-site scripting (XSS) attacks, bypass Content

Security Policy (CSP) restrictions, conduct DNS rebinding attacks, or

execute arbitrary code.

Topics%20covered

Topics Covered

security advisory Ubuntu Denial of Service Firefox Code Execution Browser Exploit Phishing Attack

Update Instructions

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 16.04 LTS:
  firefox                         83.0+build2-0ubuntu0.16.04.3

After a standard system update you need to restart Firefox to make
all the necessary changes.

References

https://ubuntu.com/security/notices/USN-4637-2

https://ubuntu.com/security/notices/USN-4637-1

CVE-2020-16012, CVE-2020-26951, CVE-2020-26952, CVE-2020-26953,

CVE-2020-26956, CVE-2020-26958, CVE-2020-26959, CVE-2020-26960,

CVE-2020-26961, CVE-2020-26962, CVE-2020-26963, CVE-2020-26965,

CVE-2020-26967, CVE-2020-26968, CVE-2020-26969

Severity
critical
Lowest
Low
Medium
High
Critical

November 19, 2020

Topics%20covered

Topics Covered

security advisory Ubuntu Denial of Service Firefox Code Execution Browser Exploit Phishing Attack

Package Information

https://launchpad.net/ubuntu/+source/firefox/83.0+build2-0ubuntu0.16.04.3

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