ignore PAM environment vars when UseLogin=yes

If PAM is configured to read user-specified environment variables
and UseLogin=yes in sshd_config, then a hostile local user may
attack /bin/login via LD_PRELOAD or similar environment variables
set via PAM.

CVE-2015-8325, found by Shayan Sadigh, via Colin Watson

1 files changed, 1 insertions, 1 deletions

diff --git a/session.c b/session.c
index 485924570..4653b09ff 100644
--- a/session.c
+++ b/session.c
@@ -1322,7 +1322,7 @@ do_setup_env(Session *s, const char *shell)
          * Pull in any environment variables that may have
          * been set by PAM.
          */
-        if (options.use_pam) {
+        if (options.use_pam && !options.use_login) {
                 char **p;
 
                 p = fetch_pam_child_environment();