漏洞信息
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Vulnerability Title
acl < 2.4.0 TOCTOU Symlink Traversal via getfacl/setfacl/chacl
Vulnerability Description
acl before version 2.4.0 contains a time-of-check to time-of-use (TOCTOU) race condition vulnerability that allows local attackers to escalate privileges by replacing a pathname component with a symbolic link between an lstat() check and subsequent symlink-following operations such as stat(), chown(), chmod(), acl_get_file(), and acl_set_file(). Attackers who control a pathname component can redirect file access control list operations to arbitrary files when getfacl, setfacl, or chacl is invoked by a privileged process over an attacker-controlled path, resulting in local privilege escalation.
CVSS Information
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N
Vulnerability Type
检查时间与使用时间(TOCTOU)的竞争条件
Vulnerability Title
ACL 竞争条件问题漏洞
Vulnerability Description
ACL ACL是ACL组织开源的一款用于实现访问控制与权限管理的安全权限控制框架。 acl 2.4.0之前版本存在竞争条件问题漏洞,该漏洞源于TOCTOU竞争条件问题,允许本地攻击者通过替换lstat()检查与后续符号链接跟踪操作之间的路径名组件为符号链接,从而在特权进程在攻击者控制的路径上调用getfacl、setfacl或chacl时重定向文件访问控制列表操作,导致本地权限提升。
CVSS Information
N/A
Vulnerability Type
N/A