Ensure BIND Processes Run in the named_t Confined Context Type

低级别 2自动化bind

说明

SELinux includes customizable targeted policies that may be used to confine the BIND named server to enforce least privileges so that the server has only the minimal access to specified directories, files and network ports. Access is controlled by process types (domains) defined for the named process. The audit runs ps -eZ and requires every named process to run in the named_t SELinux type.

检查方式

审计方法: Shell 命令

shell

out=$(ps -eZ 2>/dev/null) || exit 1
p=$(printf '%s\n' "$out" | awk '$NF=="named"{print $1}')
[ -n "$p" ] || { echo 'named is not running'; exit 1; }
bad=$(printf '%s\n' "$p" | awk -F: '$3 != "named_t"')
[ -z "$bad" ] && echo compliant || echo "named context: $bad"

预期输出: compliant

修复方式

修复方法: 操作指南或基础设施补丁

If the running named process is not confined to the named_t SELinux context. Then check the labeled context for the named binaries and set the binary files to have a context of named_exec_t as shown below. The named-checkconf executable should have named_checkconf_exec_t type. # ls -Z /usr/sbin/named /usr/sbin/named-checkconf /usr/sbin/unbound-anchor system_u:object_r:named_exec_t:s0 /usr/sbin/named system_u:object_r:named_checkconf_exec_t:s0 /usr/sbin/named-checkconf system_u:object_r:named_exec_t:s0 /usr/sbin/unbound-anchor If the executable files are not labeled correctly, they may be relabeled with the chcon command, as shown, however the file system labeling is based on the SELinux ...

属性

操作系统: 任意
标签: binddnsselinux
参考: CIS ISC BIND DNS Server 9.11 Benchmark v1.0.0 - 10.2 Ensure BIND Processes Run in the named_t Confined Context Type

检查本机

请在您有权审计的机器上运行此命令。扫描为只读操作。

shell

tmaegis scan --target bind --level 2