[USN-3918-2] Firefox vulnerabilities

Chris Coulson chris.coulson at canonical.com
Mon Mar 25 14:45:24 UTC 2019

Ubuntu Security Notice USN-3918-2
March 25, 2019

firefox vulnerabilities

A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 14.04 LTS


Several security issues were fixed in Firefox.

Software Description:
- firefox: Mozilla Open Source web browser


USN-3918-1 fixed vulnerabilities in Firefox. This update provides the
corresponding updates for Ubuntu 14.04 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 via application
 crash, denial of service via successive FTP authorization prompts or modal
 alerts, trick the user with confusing permission request prompts, obtain
 sensitive information, conduct social engineering attacks, or execute
 arbitrary code. (CVE-2019-9788, CVE-2019-9789, CVE-2019-9790,
 CVE-2019-9791, CVE-2019-9792, CVE-2019-9795, CVE-2019-9796, CVE-2019-9797,
 CVE-2019-9799, CVE-2019-9802, CVE-2019-9805, CVE-2019-9806, CVE-2019-9807,
 CVE-2019-9808, CVE-2019-9809)
 A mechanism was discovered that removes some bounds checking for string,
 array, or typed array accesses if Spectre mitigations have been disabled.
 If a user were tricked in to opening a specially crafted website with
 Spectre mitigations disabled, an attacker could potentially exploit this
 to cause a denial of service, or execute arbitrary code. (CVE-2019-9793)
 It was discovered that Upgrade-Insecure-Requests was incorrectly enforced
 for same-origin navigation. An attacker could potentially exploit this to
 conduct man-in-the-middle (MITM) attacks. (CVE-2019-9803)

Update instructions:

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

Ubuntu 14.04 LTS:
  firefox                         66.0.1+build1-0ubuntu0.14.04.1

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

  CVE-2019-9788, CVE-2019-9789, CVE-2019-9790, CVE-2019-9791,
  CVE-2019-9792, CVE-2019-9793, CVE-2019-9795, CVE-2019-9796,
  CVE-2019-9797, CVE-2019-9799, CVE-2019-9802, CVE-2019-9803,
  CVE-2019-9805, CVE-2019-9806, CVE-2019-9807, CVE-2019-9808,

Package Information:

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