CVE:CVE-2021-30771
CNNVD:CNNVD-202202-1343
Apple macOS等都是美国苹果（Apple）公司的产品。Apple macOS是一套专为Mac计算机所开发的专用操作系统。Apple macOS Big Sur是一个手机应用APP。WatchOs是一套使用于Apple Watch的手表操作系统。
Apple多款产品存在安全漏洞，该漏洞源于ibFontParser 库用TTF字体制作的数据可能会触发超出已分配数据结构末尾的写操作。攻击者可利用该漏洞在当前进程的上下文中执行代码。
solution:Upgrade apple ipados to a higher version than 14.6,and avoid the version (,14.6); Upgrade apple iphone_os to a higher version than 14.6,and avoid the version (,14.6); Upgrade apple macos to a higher version than 11.4,and avoid the version [11.0,11.4); Upgrade apple tvos to a higher version than 14.6,and avoid the version (,14.6); Upgrade apple watchos to a higher version than 7.5,and avoid the version (,7.5)