CVE-2017-7784

Name of the Vulnerable Software and Affected Versions Firefox ESR versions prior to 52.3 Firefox versions prior to 55 Thunderbird versions prior to 52.3

Description The issue is related to a use-after-free vulnerability in the nsImageLoadingContent::Notify function, which can occur when reading an image observer during frame reconstruction after the observer has been freed. This results in a potentially exploitable crash, allowing a remote attacker to impact the confidentiality, integrity, and availability of protected information.

Recommendations For Firefox ESR versions prior to 52.3, update to version 52.3 or later. For Firefox versions prior to 55, update to version 55 or later. For Thunderbird versions prior to 52.3, update to version 52.3 or later.