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 4f02d078f1a5f1a99a487bf5a7fd2d53589468c9..83594c9731db8e7da88916a2d4232f1018ac09fb 100644 (file)
--- a/src/src/tls-openssl.c
+++ b/src/src/tls-openssl.c
@@ -897,7 +897,7 @@ bad:
     {
     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");