--- Begin Message ---
Package: release.debian.org
Severity: normal
User: release.debian.org@packages.debian.org
Usertags: unblock
Hi
Please unblock package shadow
It fixes a regression introduced in the last upload, from the fix for
CVE-2017-2616. If su recieves a signal like SIGTERM, it was not
propagated to the child.
Changelog:
+shadow (1:4.4-4.1) unstable; urgency=high
+
+ * Non-maintainer upload.
+ * Reset pid_child only if waitpid was successful.
+ This is a regression fix for CVE-2017-2616. If su receives a signal like
+ SIGTERM, it is not propagated to the child. (Closes: #862806)
+
+ -- Salvatore Bonaccorso <carnil@debian.org> Wed, 17 May 2017 13:59:59 +0200
unblock shadow/1:4.4-4.1
Regards,
Salvatore
diff -Nru shadow-4.4/debian/changelog shadow-4.4/debian/changelog
--- shadow-4.4/debian/changelog 2017-02-24 01:50:13.000000000 +0100
+++ shadow-4.4/debian/changelog 2017-05-17 13:59:59.000000000 +0200
@@ -1,3 +1,12 @@
+shadow (1:4.4-4.1) unstable; urgency=high
+
+ * Non-maintainer upload.
+ * Reset pid_child only if waitpid was successful.
+ This is a regression fix for CVE-2017-2616. If su receives a signal like
+ SIGTERM, it is not propagated to the child. (Closes: #862806)
+
+ -- Salvatore Bonaccorso <carnil@debian.org> Wed, 17 May 2017 13:59:59 +0200
+
shadow (1:4.4-4) unstable; urgency=high
* su: properly clear child PID (CVE-2017-2616) (Closes: #855943)
diff -Nru shadow-4.4/debian/patches/301-Reset-pid_child-only-if-waitpid-was-successful.patch shadow-4.4/debian/patches/301-Reset-pid_child-only-if-waitpid-was-successful.patch
--- shadow-4.4/debian/patches/301-Reset-pid_child-only-if-waitpid-was-successful.patch 1970-01-01 01:00:00.000000000 +0100
+++ shadow-4.4/debian/patches/301-Reset-pid_child-only-if-waitpid-was-successful.patch 2017-05-17 13:59:59.000000000 +0200
@@ -0,0 +1,29 @@
+From 7d82f203eeec881c584b2fa06539b39e82985d97 Mon Sep 17 00:00:00 2001
+From: Tobias Stoeckmann <tobias@stoeckmann.org>
+Date: Sun, 14 May 2017 17:58:10 +0200
+Subject: [PATCH] Reset pid_child only if waitpid was successful.
+
+Do not reset the pid_child to 0 if the child process is still
+running. This else-condition can be reached with pid being -1,
+therefore explicitly test this condition.
+
+This is a regression fix for CVE-2017-2616. If su receives a
+signal like SIGTERM, it is not propagated to the child.
+
+Reported-by: Radu Duta <raduduta@gmail.com>
+Signed-off-by: Tobias Stoeckmann <tobias@stoeckmann.org>
+---
+ src/su.c | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+--- a/src/su.c
++++ b/src/su.c
+@@ -363,7 +363,7 @@ static void prepare_pam_close_session (v
+ /* wake child when resumed */
+ kill (pid, SIGCONT);
+ stop = false;
+- } else {
++ } else if ( (pid_t)-1 != pid) {
+ pid_child = 0;
+ }
+ } while (!stop);
diff -Nru shadow-4.4/debian/patches/series shadow-4.4/debian/patches/series
--- shadow-4.4/debian/patches/series 2017-02-24 01:50:13.000000000 +0100
+++ shadow-4.4/debian/patches/series 2017-05-17 13:59:59.000000000 +0200
@@ -6,6 +6,8 @@
0006-French-manpage-translation.patch
0007-Fix-some-spelling-issues-in-the-Norwegian-translatio.patch
0008-su-properly-clear-child-PID.patch
+301-Reset-pid_child-only-if-waitpid-was-successful.patch
+
# These patches are only for the testsuite:
#900_testsuite_groupmems
#901_testsuite_gcov
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