Fix CVE-2016-1531

[exim.git] / src / src / setenv.c

diff --git a/src/src/setenv.c b/src/src/setenv.c
index 6da56d58d7d7daab3e7e7af4d6d6806cb8c88e5b..eefbec09b36c3a1789ae9b91f35898f66f8b8c89 100644 (file)
--- a/src/src/setenv.c
+++ b/src/src/setenv.c
@@ -34,6 +34,9 @@ if (!name)
   return -1;
   }
 
+if (!environ)
+  return 0;
+
 for (end = name; *end != '=' && *end; ) end++;
 len = end - name;