The cirros image was rebuilt against the 3.13.0-83 kernel, drivers e1000e, igbvf...

[packages/trusty/cirros-testvm.git] / cirros-testvm / src-cirros / buildroot-2015.05 / package / linux-pam / 0008-fix-CVE-2014-2583.patch

diff --git a/cirros-testvm/src-cirros/buildroot-2015.05/package/linux-pam/0008-fix-CVE-2014-2583.patch b/cirros-testvm/src-cirros/buildroot-2015.05/package/linux-pam/0008-fix-CVE-2014-2583.patch
new file mode 100644 (file)
index 0000000..a8b5f7b
--- /dev/null
+++ b/cirros-testvm/src-cirros/buildroot-2015.05/package/linux-pam/0008-fix-CVE-2014-2583.patch
@@ -0,0 +1,53 @@
+From 9dcead87e6d7f66d34e7a56d11a30daca367dffb Mon Sep 17 00:00:00 2001
+From: "Dmitry V. Levin" <ldv@altlinux.org>
+Date: Wed, 26 Mar 2014 22:17:23 +0000
+Subject: pam_timestamp: fix potential directory traversal issue (ticket #27)
+
+pam_timestamp uses values of PAM_RUSER and PAM_TTY as components of
+the timestamp pathname it creates, so extra care should be taken to
+avoid potential directory traversal issues.
+
+* modules/pam_timestamp/pam_timestamp.c (check_tty): Treat
+"." and ".." tty values as invalid.
+(get_ruser): Treat "." and ".." ruser values, as well as any ruser
+value containing '/', as invalid.
+
+Fixes CVE-2014-2583.
+
+Reported-by: Sebastian Krahmer <krahmer@suse.de>
+Signed-off-by: Gustavo Zacarias <gustavo@zacarias.com.ar>
+
+diff --git a/modules/pam_timestamp/pam_timestamp.c b/modules/pam_timestamp/pam_timestamp.c
+index 5193733..b3f08b1 100644
+--- a/modules/pam_timestamp/pam_timestamp.c
++++ b/modules/pam_timestamp/pam_timestamp.c
+@@ -158,7 +158,7 @@ check_tty(const char *tty)
+               tty = strrchr(tty, '/') + 1;
+       }
+       /* Make sure the tty wasn't actually a directory (no basename). */
+-      if (strlen(tty) == 0) {
++      if (!strlen(tty) || !strcmp(tty, ".") || !strcmp(tty, "..")) {
+               return NULL;
+       }
+       return tty;
+@@ -243,6 +243,17 @@ get_ruser(pam_handle_t *pamh, char *ruserbuf, size_t ruserbuflen)
+               if (pwd != NULL) {
+                       ruser = pwd->pw_name;
+               }
++      } else {
++              /*
++               * This ruser is used by format_timestamp_name as a component
++               * of constructed timestamp pathname, so ".", "..", and '/'
++               * are disallowed to avoid potential path traversal issues.
++               */
++              if (!strcmp(ruser, ".") ||
++                  !strcmp(ruser, "..") ||
++                  strchr(ruser, '/')) {
++                      ruser = NULL;
++              }
+       }
+       if (ruser == NULL || strlen(ruser) >= ruserbuflen) {
+               *ruserbuf = '\0';
+-- 
+cgit v0.10.2
+