system
Describe <CVE-2012-4217>.
user
What is <CVE-2012-4217>?
assistant
Use-after-free vulnerability in the nsViewManager::ProcessPendingUpdates function in Mozilla Firefox before 17.0, Thunderbird before 17.0, and SeaMonkey before 2.14 allows remote attackers to execute arbitrary code or cause a denial of service (heap memory corruption) via unspecified vectors..