A lack of parameter validation on IPC messages results in a potential out-of-bounds write through malformed IPC messages. This can potentially allow for sandbox escape through memory corruption in the parent process. This vulnerability affects Thunderbird < 52.7, Firefox ESR < 52.7, and Firefox < 59.
595952.752.7Exploitability
AV:NAC:LPR:NUI:NScope
S:CImpact
C:NI:HA:N8.6/CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:N