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pcs before version 0.9.164 and 0.10 is vulnerable to a privilege escalation via authorized user malicious REST call. The REST interface of the pcsd service did not properly sanitize the file name from the /remote/put_file query. If the /etc/booth directory exists, an authenticated attacker with write permissions could create or overwrite arbitrary files with arbitrary data outside of the /etc/booth directory, in the context of the pcsd process.

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对外部实体的文件或目录可访问

pcs 权限许可和访问控制漏洞

pcs是一套利用命令行和Web UI来配置和管理Pacemaker和Corosync（集群软件）的工具。 pcs 0.9.164之前版本和0.10之前版本中存在提权漏洞，该漏洞源于程序没有正确过滤/remote/put_file查询中的文件名。远程攻击者可利用该漏洞在pcsd进程的上下文中在/etc/booth目录之外使用任意数据创建或覆盖任意文件。

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