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904b9f |
diff -up Linux-PAM-1.1.3/modules/pam_console/pam_console.c.abstract Linux-PAM-1.1.3/modules/pam_console/pam_console.c
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904b9f |
--- Linux-PAM-1.1.3/modules/pam_console/pam_console.c.abstract 2008-12-16 13:37:52.000000000 +0100
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
904b9f |
+++ Linux-PAM-1.1.3/modules/pam_console/pam_console.c 2010-11-01 17:01:55.000000000 +0100
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
904b9f |
@@ -34,6 +34,8 @@
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904b9f |
#include <sys/types.h>
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904b9f |
#include <sys/stat.h>
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904b9f |
#include <sys/param.h>
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904b9f |
+#include <sys/socket.h>
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904b9f |
+#include <sys/un.h>
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904b9f |
#include <fcntl.h>
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904b9f |
#include <unistd.h>
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#include <stdio.h>
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904b9f |
@@ -136,6 +138,32 @@ check_one_console_name(const char *name,
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904b9f |
}
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904b9f |
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904b9f |
static int
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904b9f |
+try_xsocket(const char *path, size_t len) {
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
904b9f |
+ int fd;
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
904b9f |
+ union {
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
904b9f |
+ struct sockaddr sa;
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
904b9f |
+ struct sockaddr_un su;
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
904b9f |
+ } addr;
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
904b9f |
+
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904b9f |
+ fd = socket(AF_UNIX, SOCK_STREAM, 0);
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
904b9f |
+ if (fd < 0)
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
904b9f |
+ return 0;
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
904b9f |
+
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
904b9f |
+ memset(&addr, 0, sizeof(addr));
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
904b9f |
+ addr.su.sun_family = AF_UNIX;
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
904b9f |
+
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
904b9f |
+ if (len > sizeof(addr.su.sun_path))
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
904b9f |
+ return 0;
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
904b9f |
+ memcpy(addr.su.sun_path, path, len);
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
904b9f |
+ if (connect(fd, &addr.sa, sizeof(addr.su) - (sizeof(addr.su.sun_path) - len)) == 0) {
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
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+ close(fd);
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904b9f |
+ return 1;
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
904b9f |
+ }
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904b9f |
+ close(fd);
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904b9f |
+ return 0;
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904b9f |
+}
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904b9f |
+
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904b9f |
+static int
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904b9f |
check_console_name(pam_handle_t *pamh, const char *consolename, int nonroot_ok, int on_set) {
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904b9f |
int found = 0;
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int statted = 0;
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904b9f |
@@ -186,22 +214,29 @@ check_console_name(pam_handle_t *pamh, c
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if (!statted && (consolename[0] == ':')) {
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904b9f |
int l;
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char *dot = NULL;
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904b9f |
- strcpy(full_path, "/tmp/.X11-unix/X");
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- l = sizeof(full_path) - 1 - strlen(full_path);
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
904b9f |
+ char *path = full_path + 1;
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+
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+ full_path[0] = '\0';
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+ strcpy(path, "/tmp/.X11-unix/X");
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904b9f |
+ l = sizeof(full_path) - 2 - strlen(path);
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904b9f |
dot = strchr(consolename + 1, '.');
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904b9f |
if (dot != NULL) {
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904b9f |
l = (l < dot - consolename - 1) ? l : dot - consolename - 1;
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904b9f |
}
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904b9f |
- strncat(full_path, consolename + 1, l);
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904b9f |
+ strncat(path, consolename + 1, l);
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
904b9f |
full_path[sizeof(full_path) - 1] = '\0';
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
904b9f |
- _pam_log(pamh, LOG_DEBUG, TRUE, "checking possible console \"%s\"",
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904b9f |
- full_path);
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
904b9f |
- if (lstat(full_path, &st) != -1) {
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
904b9f |
+ _pam_log(pamh, LOG_DEBUG, TRUE, "checking possible X socket \"%s\"",
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904b9f |
+ path);
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
904b9f |
+
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
904b9f |
+ /* this will work because st.st_uid is 0 */
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
904b9f |
+ if (try_xsocket(full_path, strlen(path)+1)) {
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
904b9f |
+ statted = 1;
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
904b9f |
+ } else if (try_xsocket(path, strlen(path))) {
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
904b9f |
statted = 1;
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
904b9f |
}
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
904b9f |
else if (!on_set) { /* there is no X11 socket in case of X11 crash */
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
904b9f |
_pam_log(pamh, LOG_DEBUG, TRUE, "can't find X11 socket to examine for %s probably due to X crash", consolename);
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
904b9f |
- statted = 1; /* this will work because st.st_uid is 0 */
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
904b9f |
+ statted = 1;
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
904b9f |
}
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
904b9f |
}
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
904b9f |
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