169 lines
5.3 KiB
Plaintext
169 lines
5.3 KiB
Plaintext
--- src/support/suexec.c.orig Mon Jun 21 19:51:41 1999
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+++ src/support/suexec.c Thu Sep 9 18:58:04 1999
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@@ -70,11 +70,35 @@
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*
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*
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*/
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+/*
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+ * "System" CGI modification 97.05.10 by Rick Franchuk (rickf@netnation.com)
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+ *
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+ * I found that while it's great to make scripts run under the UID and GID
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+ * specified in httpd.conf or what /etc/passwd says is 'cool', suEXEC can
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+ * really put a damper on 'System' cgi's, forcing copies of the scripts
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+ * to be installed into users' home directories. That didn't seem very
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+ * fitting... so I changed it so that the target UID check is disabled in
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+ * a system directory #defined in suexec+.h. I hope you all find it useful.
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+ *
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+ * The docroot check had to be bypassed to allow functionality for VirtualHost
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+ * entries. I'm somewhat suprised noone encountered that behavior before.
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+ */
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+ /*
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+ * "FPEXE modification made on 98.05.19 by Scot Hetzel (hetzels@westbend.net)
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+ * based on previous FPEXE modifications supplied by Mark Wormgoor
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+ * (riddles@ipe.nl)
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+ *
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+ * Changes were made in order to use Suexec and Frontpage 98 at the same time.
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+ * After we change to the target_uid and target_gid. We check if cmd = FPEXE,
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+ * if it does then we execute the cmd without performing any further tests.
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+ *
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+ */
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#include "ap_config.h"
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#include <sys/param.h>
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#include <sys/stat.h>
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#include <sys/types.h>
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+#include <login_cap.h>
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#include <stdarg.h>
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@@ -250,6 +274,7 @@
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char *cmd; /* command to be executed */
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char cwd[AP_MAXPATH]; /* current working directory */
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char dwd[AP_MAXPATH]; /* docroot working directory */
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+ login_cap_t *lc; /* user resource limits */
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struct passwd *pw; /* password entry holder */
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struct group *gr; /* group entry holder */
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struct stat dir_info; /* directory info holder */
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@@ -404,6 +429,19 @@
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}
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/*
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+ * Apply user resource limits based on login class.
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+ */
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+ if ((lc = login_getclassbyname(pw->pw_class, pw)) == NULL) {
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+ log_err("login_getclassbyname() failed\n");
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+ exit(248);
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+ }
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+
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+ if ((setusercontext(lc, pw, uid, LOGIN_SETRESOURCES)) != 0) {
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+ log_err("setusercontext() failed\n");
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+ exit(249);
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+ }
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+
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+ /*
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* Change UID/GID here so that the following tests work over NFS.
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*
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* Initialize the group access list for the target user,
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@@ -423,6 +461,14 @@
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}
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/*
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+ * We logged everything, changed to the target uid/gid, and know the
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+ * user is ok. We run fpexe now and bail out before anything goes wrong.
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+ */
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+#ifdef FPEXE
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+ if ((strcmp(cmd, FPEXE)) != NULL) {
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+#endif
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+
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+ /*
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* Get the current working directory, as well as the proper
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* document root (dependant upon whether or not it is a
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* ~userdir request). Error out if we cannot get either one,
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@@ -453,10 +499,15 @@
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}
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}
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+ /*
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+ * This section must be commented out to work properly with
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+ * VirtualHosts running CGI in thier own directories.
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+ *
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if ((strncmp(cwd, dwd, strlen(dwd))) != 0) {
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log_err("command not in docroot (%s/%s)\n", cwd, cmd);
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exit(114);
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}
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+ */
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/*
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* Stat the cwd and verify it is a directory, or error out.
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@@ -502,6 +553,9 @@
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* Error out if the target name/group is different from
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* the name/group of the cwd or the program.
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*/
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+#ifdef SYSTEM_CGI
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+ if (strncmp(cwd, SYSTEM_CGI, strlen(SYSTEM_CGI))) {
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+#endif
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if ((uid != dir_info.st_uid) ||
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(gid != dir_info.st_gid) ||
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(uid != prg_info.st_uid) ||
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@@ -513,6 +567,10 @@
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prg_info.st_uid, prg_info.st_gid);
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exit(120);
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}
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+#ifdef SYSTEM_CGI
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+ }
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+#endif
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+
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/*
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* Error out if the program is not executable for the user.
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* Otherwise, she won't find any error in the logs except for
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@@ -524,6 +582,49 @@
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}
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clean_env();
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+
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+#ifdef FPEXE
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+ }
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+ else {
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+
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+ /* The following taken from mod_frontpage.c to check permissions */
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+
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+ /*
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+ * We can't stat the stub dir. Make sure the stub directory is not
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+ * owned by root and not group/world writable
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+ */
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+ if ((lstat(FPSTUBDIR, &dir_info) == -1 ||
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+ dir_info.st_uid ||
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+ (dir_info.st_mode & (S_IWGRP | S_IWOTH)) ||
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+ (!S_ISDIR(dir_info.st_mode)))) {
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+ /*
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+ * User recovery: set directory to be owned by by root with
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+ * permissions r*x*-x*-x.
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+ */
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+ log_err("Incorrect permissions on stub directory \"%-.1024s\"",
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+ FPSTUBDIR);
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+ exit (250);
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+ }
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+
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+ /*
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+ * We can't stat the stub. Make sure the stub is not owned by root,
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+ * set-uid, set-gid, and is not group/world writable or executable.
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+ */
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+ if ((stat(cmd, &prg_info) == -1 ||
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+ prg_info.st_uid ||
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+ !(prg_info.st_mode & S_ISUID) ||
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+ (prg_info.st_mode & S_ISGID) ||
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+ (prg_info.st_mode & (S_IWGRP | S_IWOTH)) ||
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+ !(prg_info.st_mode & (S_IXGRP | S_IXOTH)))) {
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+ /*
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+ * User recovery: set stub to be owned by by root with permissions
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+ * r*s*-x*-x.
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+ */
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+ log_err("Incorrect permissions on stub \"%-.1024s\"", cmd);
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+ exit (251);
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+ }
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+ }
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+#endif
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/*
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* Be sure to close the log file so the CGI can't
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