1. Ubuntu Security Notices
  2. USN-3874-1

USN-3874-1: Firefox vulnerabilities

Publication date

30 January 2019

Overview

Firefox could be made to crash or run programs as your login if it opened a malicious website.

Releases

Packages

  • firefox - Mozilla Open Source web browser

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, gain additional
privileges by escaping the sandbox, or execute arbitrary code.
(CVE-2018-18500, CVE-2018-18501, CVE-2018-18502, CVE-2018-18503,
CVE-2018-18504, CVE-2018-18505)

It was discovered that Firefox allowed PAC files to specify that requests
to localhost are sent through the proxy to another server. If proxy
auto-detection is enabled, an attacker could potentially exploit this to
conduct attacks on local services and tools. (CVE-2018-18506)

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, gain additional
privileges by escaping the sandbox, or execute arbitrary code.
(CVE-2018-18500, CVE-2018-18501, CVE-2018-18502, CVE-2018-18503,
CVE-2018-18504, CVE-2018-18505)

It was discovered that Firefox allowed PAC files to specify that requests
to localhost are sent through the proxy to another server. If proxy
auto-detection is enabled, an attacker could potentially exploit this to
conduct attacks on local services and tools. (CVE-2018-18506)

Update instructions

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

Learn more about how to get the fixes.

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

Ubuntu Release Package Version
18.10 cosmic firefox –  65.0+build2-0ubuntu0.18.10.1
18.04 bionic firefox –  65.0+build2-0ubuntu0.18.04.1
16.04 xenial firefox –  65.0+build2-0ubuntu0.16.04.1
14.04 trusty firefox –  65.0+build2-0ubuntu0.14.04.1

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References

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