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[core] check success of setuid,setgid,setgroups (CVE-2013-4559) 

From: Stefan Bühler <stbuehler@web.de>

git-svn-id: svn://svn.lighttpd.net/lighttpd/branches/lighttpd-1.4.x@2923 152afb58-edef-0310-8abb-c4023f1b3aa9
This commit is contained in:
Stefan Bühler 2013-11-13 11:43:33 +00:00
parent d8b363c1d1
commit 99cddff73a
2 changed files with 13 additions and 3 deletions
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1
NEWS
View File

@ -10,6 +10,7 @@ NEWS
* [doc] update ssl.cipher-list recommendation
* [stat-cache] FAM: fix use after free (CVE-2013-4560)
* [stat-cache] fix FAM cleanup/fdevent handling
* [core] check success of setuid,setgid,setgroups (CVE-2013-4559)
- 1.4.33 - 2013-09-27
* mod_fastcgi: fix mix up of "mode" => "authorizer" in other fastcgi configs (fixes #2465, thx peex)

15
src/server.c
View File

@ -820,8 +820,14 @@ int main (int argc, char **argv) {
* to /etc/group
* */
if (NULL != grp) {
setgid(grp->gr_gid);
setgroups(0, NULL);
if (-1 == setgid(grp->gr_gid)) {
log_error_write(srv, __FILE__, __LINE__, "ss", "setgid failed: ", strerror(errno));
return -1;
}
if (-1 == setgroups(0, NULL)) {
log_error_write(srv, __FILE__, __LINE__, "ss", "setgroups failed: ", strerror(errno));
return -1;
}
if (srv->srvconf.username->used) {
initgroups(srv->srvconf.username->ptr, grp->gr_gid);
}
@ -844,7 +850,10 @@ int main (int argc, char **argv) {
#ifdef HAVE_PWD_H
/* drop root privs */
if (NULL != pwd) {
setuid(pwd->pw_uid);
if (-1 == setuid(pwd->pw_uid)) {
log_error_write(srv, __FILE__, __LINE__, "ss", "setuid failed: ", strerror(errno));
return -1;
}
}
#endif
#if defined(HAVE_SYS_PRCTL_H) && defined(PR_SET_DUMPABLE)