CVE:CVE-2021-34557
CNNVD:CNNVD-202106-821
XScreenSaver是一款使用C语言编写的开源屏幕保护程序。
XScreenSaver 中存在缓冲区错误漏洞，该漏洞源于当应用有超过10个可断开的视频输出时，update_screen_layout()会引起缓冲区溢出。攻击者可通过该漏洞绕过身份验证机制。以下产品及型号会受到影响：XScreenSaver 5.45。
solution:Upgrade xscreensaver_project xscreensaver to a higher version than 5.45,and avoid the version 5.45; Upgrade fedoraproject fedora to a higher version than 33,and avoid the version 33