Multiple Vulnerabilities in Mozilla Products Could Allow for Arbitrary Code Execution

ITS Advisory Number: 
2018-032
Date(s) Issued: 
Tuesday, March 27, 2018
Subject: 
Multiple Vulnerabilities in Mozilla Products Could Allow for Arbitrary Code Execution
Overview: 

Multiple vulnerabilities have been identified in Mozilla Thunderbird, Firefox and Firefox Extended Support Release (ESR), the most severe of which could result in arbitrary code execution. Mozilla Firefox is a web browser used to access the Internet. Mozilla Firefox ESR is a version of the web browser intended to be deployed in large organizations. Mozilla Thunderbird is an email client. Successful exploitation of the most severe of these vulnerabilities could allow for arbitrary code execution. Depending on the privileges associated with the user, an attacker could then install programs; view, change, or delete data; or create new accounts with full user rights. Users whose accounts are configured to have fewer user rights on the system could be less impacted than those who operate with administrative user rights.

 

THREAT INTELLIGENCE:

There are currently no reports of this vulnerability being exploited in the wild.

Systems Affected: 
  • Mozilla Thunderbird versions prior to 52.7

  • Mozilla Firefox versions prior to 59.0.2

  • Mozilla Firefox ESR versions prior to 52.7.3

RISK
GOVERNMENT
Large and medium government entities: 
High
Small government entities: 
Medium
BUSINESS
Large and medium business entities: 
High
Small business entities: 
Medium
Home Users: 
Low
Description: 

Multiple vulnerabilities have been identified in Mozilla Thunderbird, Firefox and Firefox Extended Support Release (ESR), the most severe of which could result in arbitrary code execution. Details of these vulnerabilities are as follows: 

  • A buffer overflow can occur when manipulating the SVG animatedPathSegList through script. This results in a potentially exploitable crash. (CVE-2018-5127)

  • A lack of parameter validation on IPC messages results in a potential out-of-bounds write through malformed IPC messages. This can potentially allow for sandbox escape through memory corruption in the parent process. (CVE-2018-5129)

  • An integer overflow can occur during conversion of text to some Unicode character sets due to an unchecked length parameter. (CVE-2018-5144)

  • An out of bounds memory write while processing Vorbis audio data. (CVE-2018-5146)

  • Memory safety bugs showed evidence of memory corruption and we presume that with enough effort that some of these could be exploited to run arbitrary code. (CVE-2018-5145, CVE-2018-5125)

  • A use-after-free vulnerability can occur in the compositor during certain graphics operations when a raw pointer is used instead of a reference counted one, which leads to potentially exploitable crashes. (CVE-2018-5148)

 Successful exploitation of the most severe of these vulnerabilities could allow for arbitrary code execution. Depending on the privileges associated with the user, an attacker could then install programs; view, change, or delete data; or create new accounts with full user rights. Users whose accounts are configured to have fewer user rights on the system could be less impacted than those who operate with administrative user rights.

Actions: 
  • After appropriate testing, immediately apply updates provided by Mozilla to vulnerable systems.
  • Run all software as a non-privileged user (one without administrative privileges) to diminish the effects of a successful attack.
  • Remind users not to visit un-trusted websites or follow links provided by unknown or un-trusted sources.
  • Inform and educate users regarding the threats posed by hypertext links contained in emails or attachments especially from un-trusted sources.
  • Apply the Principle of Least Privilege to all systems and services.