Fix CVE-2016-1531

[exim.git] / src / src / tls-openssl.c

diff --git a/src/src/tls-openssl.c b/src/src/tls-openssl.c
index b273fff75fcccc5551a0a2d80927bcbc96f5a062..9079b831358ffb5bdbb8a23fac13e5b607ed2685 100644 (file)
--- a/src/src/tls-openssl.c
+++ b/src/src/tls-openssl.c
@@ -574,7 +574,7 @@ if (running_in_test_harness)
   {
   extern char ** environ;
   uschar ** p;
-  for (p = USS environ; *p != NULL; p++)
+    if (environ) for (p = USS environ; *p != NULL; p++)
     if (Ustrncmp(*p, "EXIM_TESTHARNESS_DISABLE_OCSPVALIDITYCHECK", 42) == 0)
       {
       DEBUG(D_tls) debug_printf("Supplying known bad OCSP response\n");