Description: Drop code where nginx drops privileges for worker
processes. While setuid is covered by the browser-support plug,
setgroups isn't covered by any plugs. This code isn't required
because in strict mode we run worker processes as root:root.
The seccomp violation follows:
= Seccomp =
Time: Jun 16 01:13:15
Log: auid=4294967295 uid=0 gid=0 ses=4294967295 pid=6087 comm="nginx"
exe="/snap/keystone/x1/usr/sbin/nginx" sig=31 arch=c000003e
116(setgroups) compat=0 ip=0x7f40e288af09 code=0x0
Syscall: setgroups
Suggestion:
* adjust program to not use 'setgroups' until per-snap user/groups
are supported (https://launchpad.net/bugs/1446748)
Author: Corey Bryant <corey.bryant@canonical.com>
Forwarded: no
---
src/os/unix/ngx_process_cycle.c | 22 ----------------------
1 file changed, 22 deletions(-)
diff --git a/src/os/unix/ngx_process_cycle.c b/src/os/unix/ngx_process_cycle.c
index 1710ea8..c428673 100644
--- a/src/os/unix/ngx_process_cycle.c
+++ b/src/os/unix/ngx_process_cycle.c
@@ -824,28 +824,6 @@ ngx_worker_process_init(ngx_cycle_t *cycle, ngx_int_t worker)
}
}
- if (geteuid() == 0) {
- if (setgid(ccf->group) == -1) {
- ngx_log_error(NGX_LOG_EMERG, cycle->log, ngx_errno,
- "setgid(%d) failed", ccf->group);
- /* fatal */
- exit(2);
- }
-
- if (initgroups(ccf->username, ccf->group) == -1) {
- ngx_log_error(NGX_LOG_EMERG, cycle->log, ngx_errno,
- "initgroups(%s, %d) failed",
- ccf->username, ccf->group);
- }
-
- if (setuid(ccf->user) == -1) {
- ngx_log_error(NGX_LOG_EMERG, cycle->log, ngx_errno,
- "setuid(%d) failed", ccf->user);
- /* fatal */
- exit(2);
- }
- }
-
if (worker >= 0) {
cpu_affinity = ngx_get_cpu_affinity(worker);
--
2.7.4