Published:2011/07/28  Last Updated:2011/09/05

Mozilla Firefox vulnerable to denial-of-service (DoS)


Mozilla Firefox contains a denial-of-service (DoS) vulnerability.

Products Affected

  • Mozilla Firefox prior to 3.6


Mozilla Firefox contains an issue in the validation of certificates, leading to a denial-of-service (DoS) vulnerability.


When accessing a HTTPS site with a specially crafted Certificate Authority (CA) certificate imported, a denial-of-service (DoS) may occur.


Update the Software
Update to the latest version according to the information provided by the developer.

Vendor Status

Vendor Status Last Update Vendor Notes
Mozilla Japan vulnerable 2011/07/28


JPCERT/CC Addendum

This JVN publication was delayed to 2011/07/28 after developer fixes were developed. From the fiscal year 2011, JPCERT/CC is using a new vendor coordination procedure. This new procedure came from the recommendation of the fiscal year 2010 "Study Group on Information System Vulnerability Handling" aimed at more timely JVN publications.

Vulnerability Analysis by JPCERT/CC

Analyzed on 2011.07.28

Measures Conditions Severity
Access Required can be attacked over the Internet using packets
  • High
Authentication anonymous or no authentication (IP addresses do not count)
  • High
User Interaction Required the user must be convinced to take a difficult or suspicious action. If the honest user must have elevated privileges, they are likely to be more suspicious
  • Low
Exploit Complexity expertise and/or luck required (guessing correctly in medium-sized space, kernel expertise)
  • Low-Mid

Description of each analysis measures


Other Information

JPCERT Reports
CERT Advisory
CPNI Advisory
CVE CVE-2011-2669
JVN iPedia JVNDB-2011-000057

Update History

CVE was added under the section "Other Information."