Capability sets attached to files must be ignored except in the user namespaces where the mounter is privileged, i.e. s_user_ns and its descendants. Otherwise a vector exists for gaining privileges in namespaces where a user is not already privileged. Add a new helper function, current_in_user_ns(), to test whether a user namespace is the same as or a descendant of another namespace. Use this helper to determine whether a file's capability set should be applied to the caps constructed during exec. --EWB Replaced in_userns with the simpler current_in_userns. Acked-by: Serge Hallyn <serge.hallyn@canonical.com> Signed-off-by: Seth Forshee <seth.forshee@canonical.com> Signed-off-by: Eric W. Biederman <ebiederm@xmission.com> |
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apparmor | ||
integrity | ||
keys | ||
loadpin | ||
selinux | ||
smack | ||
tomoyo | ||
yama | ||
Kconfig | ||
Makefile | ||
commoncap.c | ||
device_cgroup.c | ||
inode.c | ||
lsm_audit.c | ||
min_addr.c | ||
security.c |