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Category:   Application (Web Browser)  >   Mozilla Firefox Vendors:   Mozilla.org
Mozilla Firefox File Processing Flaws Let Remote Users Execute Arbitrary Code
SecurityTracker Alert ID:  1041770
SecurityTracker URL:  http://securitytracker.com/id/1041770
CVE Reference:   CVE-2018-12386, CVE-2018-12387   (Links to External Site)
Date:  Oct 2 2018
Impact:   Execution of arbitrary code via network, User access via network
Fix Available:  Yes  Vendor Confirmed:  Yes  

Description:   Two vulnerabilities were reported in Mozilla Firefox. A remote user can cause arbitrary code to be executed on the target user's system.

A remote user can create a specially crafted file that, when loaded by the target user, will trigger a register allocation and type confusion error and execute arbitrary code on the target system [CVE-2018-12386].

A remote user can trigger a bailout error in the JavaScript JIT compiler when inlining 'Array.prototype.push' to potentially execute arbitrary code within the sandboxed content process [CVE-2018-12387].

Samuel Gross, Bruno Keith (via Beyond Security's SecuriTeam Secure Disclosure program), and Niklas Baumstark (via Beyond Security's SecuriTeam Secure Disclosure program) reported these vulnerabilities.

Impact:   A remote user can create content that, when loaded by the target user, will execute arbitrary code on the target user's system.
Solution:   The vendor has issued a fix (62.0.3, ESR 60.2.2).

The vendor advisory is available at:

https://www.mozilla.org/en-US/security/advisories/mfsa2018-24/

Vendor URL:  www.mozilla.org/en-US/security/advisories/mfsa2018-24/ (Links to External Site)
Cause:   Access control error
Underlying OS:  Linux (Any), UNIX (Any), Windows (Any)

Message History:   This archive entry has one or more follow-up message(s) listed below.
Oct 3 2018 (Ubuntu Issues Fix) Mozilla Firefox File Processing Flaws Let Remote Users Execute Arbitrary Code
Ubuntu has issued a fix for Ubuntu Linux 14.04 LTS, 16.04 LTS, and 18.04 LTS.
Oct 8 2018 (Red Hat Issues Fix) Mozilla Firefox File Processing Flaws Let Remote Users Execute Arbitrary Code
Red Hat has issued a fix for Red Hat Enterprise Linux 6.
Oct 8 2018 (Red Hat Issues Fix) Mozilla Firefox File Processing Flaws Let Remote Users Execute Arbitrary Code
Red Hat has issued a fix for Red Hat Enterprise Linux 7.
Oct 9 2018 (Oracle Issues Fix for Oracle Linux) Mozilla Firefox File Processing Flaws Let Remote Users Execute Arbitrary Code
Oracle has issued a fix for Oracle Linux 7.



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