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Ubuntu Security Notice USN-3778-1

Ubuntu Security Notice USN-3778-1
Posted Oct 4, 2018
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 3778-1 - A crash was discovered in TransportSecurityInfo used for SSL, which could be triggered by data stored in the local cache directory. An attacker could potentially exploit this in combination with another vulnerability that allowed them to write data to the cache, to execute arbitrary code. A type confusion bug was discovered in JavaScript. If a user were tricked in to opening a specially crafted website, an attacker could exploit this to cause a denial of service, or execute arbitrary code. Various other issues were also addressed.

tags | advisory, denial of service, arbitrary, local, javascript
systems | linux, ubuntu
advisories | CVE-2018-12385, CVE-2018-12386, CVE-2018-12387
SHA-256 | a69ab9fe6502be4b61f6561f6d0e2050616a619735003e0abb30915f7a0370a6

Ubuntu Security Notice USN-3778-1

Change Mirror Download
==========================================================================
Ubuntu Security Notice USN-3778-1
October 03, 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:

A crash was discovered in TransportSecurityInfo used for SSL, which could
be triggered by data stored in the local cache directory. An attacker
could potentially exploit this in combination with another vulnerability
that allowed them to write data to the cache, to execute arbitrary code.
(CVE-2018-12385)

A type confusion bug was discovered in JavaScript. If a user were tricked
in to opening a specially crafted website, an attacker could exploit this
to cause a denial of service, or execute arbitrary code. (CVE-2018-12386)

It was discovered that the Array.prototype.push could leak memory
addresses to the calling function in some circumstances. An attacker could
exploit this in combination with another vulnerability to help execute
arbitrary code. (CVE-2018-12387)

Update instructions:

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

Ubuntu 18.04 LTS:
firefox 62.0.3+build1-0ubuntu0.18.04.1

Ubuntu 16.04 LTS:
firefox 62.0.3+build1-0ubuntu0.16.04.2

Ubuntu 14.04 LTS:
firefox 62.0.3+build1-0ubuntu0.14.04.2

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

References:
https://usn.ubuntu.com/usn/usn-3778-1
CVE-2018-12385, CVE-2018-12386, CVE-2018-12387

Package Information:
https://launchpad.net/ubuntu/+source/firefox/62.0.3+build1-0ubuntu0.18.04.1
https://launchpad.net/ubuntu/+source/firefox/62.0.3+build1-0ubuntu0.16.04.2
https://launchpad.net/ubuntu/+source/firefox/62.0.3+build1-0ubuntu0.14.04.2


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