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AUSCERT External Security Bulletin Redistribution
ESB-2018.2985
Firefox vulnerabilities
4 October 2018
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AusCERT Security Bulletin Summary
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Product: firefox
Publisher: Ubuntu
Operating System: Ubuntu
Impact/Access: Execute Arbitrary Code/Commands -- Remote with User Interaction
Denial of Service -- Remote with User Interaction
Resolution: Patch/Upgrade
CVE Names: CVE-2018-12387 CVE-2018-12386 CVE-2018-12385
Reference: ASB-2018.0227
ASB-2018.0224
ESB-2018.2921
ESB-2018.2843
Original Bulletin:
http://www.ubuntu.com/usn/usn-3778-1
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USN-3778-1: Firefox vulnerabilities
3 October 2018
firefox vulnerabilities
A security issue affects these releases of Ubuntu and its derivatives:
o Ubuntu 18.04 LTS
o Ubuntu 16.04 LTS
o 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
o 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
To update your system, please follow these instructions: https://
wiki.ubuntu.com/Security/Upgrades.
After a standard system update you need to restart Firefox to make all the
necessary changes.
References
o CVE-2018-12385
o CVE-2018-12386
o CVE-2018-12387
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