Multiple Vulnerabilities in Mozilla Firefox Could Allow for Arbitrary Code Execution

ITS Advisory Number: 
Date(s) Issued: 
Wednesday, January 27, 2016
Multiple Vulnerabilities in Mozilla Firefox Could Allow for Arbitrary Code Execution

Mozilla Firefox is a web browser used to access the Internet. This advisory identifies multiple vulnerabilities in Mozilla Firefox and Firefox ESR, which could allow for arbitrary code execution. Exploitation of these issues can allow an attacker to bypass security restrictions and perform unauthorized actions, obtain sensitive information, bypass same-origin policy restrictions to access data, and execute arbitrary code in the context of the affected application.

Systems Affected: 
  • Mozilla Firefox versions prior to 44
  • Mozilla Firefox ESR versions prior to 38.6
Large and medium government entities: 
Small government entities: 
Large and medium business entities: 
Small business entities: 
Home Users: 

Multiple vulnerabilities were found in Firefox and Firefox ESR. These vulnerabilities could allow for arbitrary code execution in the context of the logged on user or vulnerable application, crash the affected application, disclose sensitive information, bypass the same-origin policy and other security restrictions, and perform unauthorized actions. Details of these vulnerabilities are as follows:

  • CVE-2016-1930, CVE-2016-1931: Multiple memory-corruption vulnerabilities affecting the browser engine.
  • CVE-2016-1933: A denial-of-service vulnerability
  • CVE-2016-1935: A buffer-overflow vulnerability
  • CVE-2015-7208, CVE-2016-1939: A security-bypass in a web server
  • CVE-2016-1940: URL/Address bar spoofing
  • CVE-2016-1937: Unintentional user interactions
  • CVE-2016-1938: Potential cryptographic weaknesses
  • CVE-2016-1941: A security vulnerability affecting OS X installations
  • CVE-2016-1943: CVE-2016-1942: Multiple security-bypass and spoofing by malicious domains
  • CVE-2016-1944: CVE-2016-1945, CVE-2016-1946: Multiple memory manipulation
  • CVE-2016-1947: Disabled reputation service in Firefox version 43
  • CVE-2016-1948: Lightweight themes on Firefox for Android not verifying  secure connection allowing man-in-the-middle (MITM) attacks
  • Apply appropriate updates provided by Mozilla to vulnerable systems, immediately after appropriate testing.
  • 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.