CVE-2013-1690
Mozilla Firefox and Thunderbird Denial-of-Service Vulnerability
Mozilla Firefox and Thunderbird
Mozilla Firefox before 22.0, Firefox ESR 17.x before 17.0.7, Thunderbird before 17.0.7, and Thunderbird ESR 17.x before 17.0.7 do not properly handle onreadystatechange events in conjunction with page reloading, which allows remote attackers to cause a denial of service (application crash) or possibly execute arbitrary code via a crafted web site that triggers an attempt to execute data at an unmapped memory location.
Exploitation status
CISA Known Exploited Vulnerabilities
Listed by CISA on 28 March 2022. US federal agencies were required to remediate it by 18 April 2022.
EPSS — exploitation probability
FIRST puts the probability of exploitation activity in the next 30 days at 69%, which is higher than 99.3% of all scored vulnerabilities. EPSS is a forecast of activity, not a measure of severity, and it is rescored daily.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Frequently asked questions
Is CVE-2013-1690 being exploited by ransomware groups?
No ransomware group in this database is currently recorded as exploiting CVE-2013-1690.
What does CVE-2013-1690 affect?
CVE-2013-1690 affects Mozilla Firefox and Thunderbird. Mozilla Firefox before 22.0, Firefox ESR 17.x before 17.0.7, Thunderbird before 17.0.7, and Thunderbird ESR 17.x before 17.0.7 do not properly handle onreadystatechange events in conjunction with page reloading, which allows remote attackers to cause a denial of service (application crash) or possibly execute arbitrary code via a crafted web site that triggers an attempt to execute data at an unmapped memory location.
How severe is CVE-2013-1690?
CVE-2013-1690 is rated HIGH with a CVSS base score of 8.8. EPSS puts the probability of exploitation in the next 30 days at 69%, higher than 99.3% of all scored vulnerabilities. It is listed in the CISA Known Exploited Vulnerabilities catalog, with a federal remediation deadline of 18 April 2022.
How should organisations respond to CVE-2013-1690?
Apply the vendor patch for Mozilla Firefox and Thunderbird as the first priority, and treat any internet-facing instance as the most urgent. Because this vulnerability is associated with ransomware activity, also review whether the affected systems were reachable before patching, rather than assuming that patching alone closes the incident.