CVE编号
CVE-2021-34557利用情况
暂无补丁情况
官方补丁披露时间
2021-06-11漏洞描述
XScreenSaver 5.45 can be bypassed if the machine has more than ten disconnectable video outputs. A buffer overflow in update_screen_layout() allows an attacker to bypass the standard screen lock authentication mechanism by crashing XScreenSaver. The attacker must physically disconnect many video outputs.解决建议
建议您更新当前系统或软件至最新版，完成漏洞的修复。
参考链接 |
|
|---|---|
| http://www.openwall.com/lists/oss-security/2021/06/11/1 | |
| http://www.openwall.com/lists/oss-security/2021/07/06/2 | |
| https://github.com/QubesOS/qubes-issues/issues/6595 | |
| https://github.com/QubesOS/qubes-secpack/blob/master/QSBs/qsb-068-2021.txt | |
| https://github.com/QubesOS/qubes-xscreensaver/blob/master/0001-Fix-updating-o... | |
| https://lists.fedoraproject.org/archives/list/[email protected]... | |
| https://www.openwall.com/lists/oss-security/2021/06/05/1 |
受影响软件情况
| # | 类型 | 厂商 | 产品 | 版本 | 影响面 | ||||
| 1 | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| 运行在以下环境 | |||||||||
| 应用 | xscreensaver_project | xscreensaver | 5.45 | - | |||||
| 运行在以下环境 | |||||||||
| 系统 | alpine_edge | xscreensaver | * |
Up to (excluding) 6.02-r0 |
|||||
| 运行在以下环境 | |||||||||
| 系统 | debian_10 | xscreensaver | * |
Up to (excluding) 5.42+dfsg1-1 |
|||||
| 运行在以下环境 | |||||||||
| 系统 | debian_9 | xscreensaver | * |
Up to (excluding) 5.36-1 |
|||||
| 运行在以下环境 | |||||||||
| 系统 | fedora_33 | xscreensaver | * |
Up to (excluding) 5.45-2.fc33 |
|||||
- 攻击路径 物理
- 攻击复杂度 容易
- 权限要求 无需权限
- 影响范围 有限影响
- EXP成熟度 N/A
- 补丁情况 官方补丁
- 数据保密性 无影响
- 数据完整性 无影响
- 服务器危害 服务器失陷
- 全网数量 N/A
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