Vulnerability Information
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Vulnerability Title
N/A
Vulnerability Description
systemd-tmpfiles in systemd before 237 attempts to support ownership/permission changes on hardlinked files even if the fs.protected_hardlinks sysctl is turned off, which allows local users to bypass intended access restrictions via vectors involving a hard link to a file for which the user lacks write access, as demonstrated by changing the ownership of the /etc/passwd file.
CVSS Information
N/A
Vulnerability Type
N/A
Vulnerability Title
systemd 安全漏洞
Vulnerability Description
systemd是德国软件开发者Lennart Poettering和其他人共同研发的一款基于Linux的系统和服务管理器，它兼容了SysV和LSB的启动脚本，且提供了一个用来表示系统服务间依赖关系的框架。 systemd 237之前版本中的systemd-tmpfiles存在安全漏洞，该漏洞源于fs.protected_hardlinks sysctl在关闭之后，程序仍可更改硬链接文件的所有权/权限。本地攻击者可利用该漏洞绕过访问限制。
CVSS Information
N/A
Vulnerability Type
N/A