1 files changed, 0 insertions, 59 deletions
diff --git a/community/shadow/301-CVE-2017-2616-su-properly-clear-child-PID.patch b/community/shadow/301-CVE-2017-2616-su-properly-clear-child-PID.patch
deleted file mode 100644
index 8f6f4e92e96..00000000000
--- a/community/shadow/301-CVE-2017-2616-su-properly-clear-child-PID.patch
+++ /dev/null
@@ -1,59 +0,0 @@
-From 08fd4b69e84364677a10e519ccb25b71710ee686 Mon Sep 17 00:00:00 2001
-From: Tobias Stoeckmann <tobias@stoeckmann.org>
-Date: Thu, 23 Feb 2017 09:47:29 -0600
-Subject: [PATCH] su: properly clear child PID
-
-If su is compiled with PAM support, it is possible for any local user
-to send SIGKILL to other processes with root privileges. There are
-only two conditions. First, the user must be able to perform su with
-a successful login. This does NOT have to be the root user, even using
-su with the same id is enough, e.g. "su $(whoami)". Second, SIGKILL
-can only be sent to processes which were executed after the su process.
-It is not possible to send SIGKILL to processes which were already
-running. I consider this as a security vulnerability, because I was
-able to write a proof of concept which unlocked a screen saver of
-another user this way.
----
- src/su.c | 19 +++++++++++++++++--
- 1 file changed, 17 insertions(+), 2 deletions(-)
-
---- a/src/su.c
-+++ b/src/su.c
-@@ -363,20 +363,35 @@ static void prepare_pam_close_session (v
- 				/* wake child when resumed */
- 				kill (pid, SIGCONT);
- 				stop = false;
-+			} else {
-+				pid_child = 0;
- 			}
- 		} while (!stop);
- 	}
- 
--	if (0 != caught) {
-+	if (0 != caught && 0 != pid_child) {
- 		(void) fputs ("\n", stderr);
- 		(void) fputs (_("Session terminated, terminating shell..."),
- 		              stderr);
- 		(void) kill (-pid_child, caught);
- 
- 		(void) signal (SIGALRM, kill_child);
-+		(void) signal (SIGCHLD, catch_signals);
- 		(void) alarm (2);
- 
--		(void) wait (&status);
-+		sigemptyset (&ourset);
-+		if ((sigaddset (&ourset, SIGALRM) != 0)
-+		    || (sigprocmask (SIG_BLOCK, &ourset, NULL) != 0)) {
-+			fprintf (stderr, _("%s: signal masking malfunction\n"), Prog);
-+			kill_child (0);
-+		} else {
-+			while (0 == waitpid (pid_child, &status, WNOHANG)) {
-+				sigsuspend (&ourset);
-+			}
-+			pid_child = 0;
-+			(void) sigprocmask (SIG_UNBLOCK, &ourset, NULL);
-+		}
-+
- 		(void) fputs (_(" ...terminated.\n"), stderr);
- 	}
-