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Ubuntu Security Notice USN-3761-1

Ubuntu Security Notice USN-3761-1
Posted Sep 7, 2018
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 3761-1 - 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, or execute arbitrary code. It was discovered that if a user saved passwords before Firefox 58 and then later set a master password, an unencrypted copy of these passwords would still be accessible. A local user could exploit this to obtain sensitive information. Various other issues were also addressed.

tags | advisory, denial of service, arbitrary, local
systems | linux, ubuntu
advisories | CVE-2018-12375, CVE-2018-12378, CVE-2018-12383
MD5 | 06dfce46c9c583404c278a7a531ef06a

Ubuntu Security Notice USN-3761-1

Change Mirror Download
==========================================================================
Ubuntu Security Notice USN-3761-1
September 06, 2018

firefox vulnerabilities
==========================================================================

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

- Ubuntu 18.04 LTS
- Ubuntu 16.04 LTS
- Ubuntu 14.04 LTS

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:

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, or execute
arbitrary code. (CVE-2018-12375, CVE-2018-12376, CVE-2018-12377,
CVE-2018-12378)

It was discovered that if a user saved passwords before Firefox 58 and
then later set a master password, an unencrypted copy of these passwords
would still be accessible. A local user could exploit this to obtain
sensitive information. (CVE-2018-12383)

Update instructions:

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

Ubuntu 18.04 LTS:
firefox 62.0+build2-0ubuntu0.18.04.3

Ubuntu 16.04 LTS:
firefox 62.0+build2-0ubuntu0.16.04.3

Ubuntu 14.04 LTS:
firefox 62.0+build2-0ubuntu0.14.04.3

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

References:
https://usn.ubuntu.com/usn/usn-3761-1
CVE-2018-12375, CVE-2018-12376, CVE-2018-12377, CVE-2018-12378,
CVE-2018-12383

Package Information:
https://launchpad.net/ubuntu/+source/firefox/62.0+build2-0ubuntu0.18.04.3
https://launchpad.net/ubuntu/+source/firefox/62.0+build2-0ubuntu0.16.04.3
https://launchpad.net/ubuntu/+source/firefox/62.0+build2-0ubuntu0.14.04.3

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