ENABLE_OPENSSL_VERSION_CHECK was intended to be used to disable checks for vulnerable...

[freeradius.git] / src / main / version.c

diff --git a/src/main/version.c b/src/main/version.c
index a3a6ad7..760a1bf 100644 (file)
--- a/src/main/version.c
+++ b/src/main/version.c
@@ -34,47 +34,81 @@ RCSID("$Id$")
 
 static long ssl_built = OPENSSL_VERSION_NUMBER;
 
-/** Check build and linked versions of OpenSSL match
+/** Print the current linked version of Openssl
+ *
+ * Print the currently linked version of the OpenSSL library.
+ */
+const char *ssl_version(void)
+{
+       return SSLeay_version(SSLEAY_VERSION);
+}
+#else
+const char *ssl_version()
+{
+       return "not linked";
+}
+#endif
+
+
+/** Check built and linked versions of OpenSSL match
+ *
+ * OpenSSL version number consists of:
+ * MNNFFPPS: major minor fix patch status
+ *
+ * Where status >= 0 && < 10 means beta, and status 10 means release.
  *
  * Startup check for whether the linked version of OpenSSL matches the
  * version the server was built against.
  *
  * @return 0 if ok, else -1
  */
-int ssl_check_version(void)
+#ifdef HAVE_OPENSSL_CRYPTO_H
+int ssl_check_version(int allow_vulnerable)
 {
        long ssl_linked;
-       
+
        ssl_linked = SSLeay();
-       
-       if (ssl_linked != ssl_built) {
-               radlog(L_ERR, "libssl version mismatch."
-                      "  Built with: %lx\n  Linked: %lx",
-                      (unsigned long) ssl_built,
-                      (unsigned long) ssl_linked);
-       
+
+       /*
+        *      Status mismatch always triggers error.
+        */
+       if ((ssl_linked & 0x0000000f) != (ssl_built & 0x0000000f)) {
+       mismatch:
+               radlog(L_ERR, "libssl version mismatch.  built: %lx linked: %lx",
+                      (unsigned long) ssl_built, (unsigned long) ssl_linked);
+
                return -1;
-       };
-       
-       return 0;
-}
+       }
 
-/** Print the current linked version of Openssl
- *
- * Print the currently linked version of the OpenSSL library.
- */
-const char *ssl_version(void)
-{
-       return SSLeay_version(SSLEAY_VERSION); 
-}
-#else
-int ssl_version_check(void) {
-       return 0;
-}
+       /*
+        *      Use the OpenSSH approach and relax fix checks after version
+        *      1.0.0 and only allow moving backwards within a patch
+        *      series.
+        */
+       if (ssl_built & 0xf0000000) {
+               if ((ssl_built & 0xfffff000) != (ssl_linked & 0xfffff000) ||
+                   (ssl_built & 0x00000ff0) > (ssl_linked & 0x00000ff0)) goto mismatch;
+       /*
+        *      Before 1.0.0 we require the same major minor and fix version
+        *      and ignore the patch number.
+        */
+       } else if ((ssl_built & 0xfffff000) != (ssl_linked & 0xfffff000)) goto mismatch;
 
-const char *ssl_version()
-{
-       return "not linked"
+#  ifdef ENABLE_OPENSSL_VERSION_CHECK
+       if (!allow_vulnerable) {
+               /* Check for bad versions */
+               /* 1.0.1 - 1.0.1f CVE-2014-0160 http://heartbleed.com */
+               if ((ssl_linked >= 0x010001000) && (ssl_linked < 0x010001070)) {
+                       radlog(L_ERR, "Refusing to start with libssl version %s (in range 1.0.1 - 1.0.1f).  "
+                             "Security advisory CVE-2014-0160 (Heartbleed)", ssl_version());
+                       radlog(L_ERR, "For more information see http://heartbleed.com");
+
+                       return -1;
+               }
+       }
+#  endif
+
+       return 0;
 }
 #endif
 
@@ -86,7 +120,7 @@ void version(void)
 
        radlog(L_INFO, "%s: %s", progname, radiusd_version);
        DEBUG3("Server was built with: ");
-               
+
 #ifdef WITH_ACCOUNTING
        DEBUG3("  accounting");
 #endif
@@ -131,13 +165,13 @@ void version(void)
        DEBUG3("Server core libs:");
        DEBUG3("  ssl: %s", ssl_version());
 
-       radlog(L_INFO, "Copyright (C) 1999-2013 The FreeRADIUS server project and contributors.");
+       radlog(L_INFO, "Copyright (C) 1999-2015 The FreeRADIUS server project and contributors.");
        radlog(L_INFO, "There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A");
        radlog(L_INFO, "PARTICULAR PURPOSE.");
        radlog(L_INFO, "You may redistribute copies of FreeRADIUS under the terms of the");
        radlog(L_INFO, "GNU General Public License.");
        radlog(L_INFO, "For more information about these matters, see the file named COPYRIGHT.");
-       
+
        fflush(NULL);
 }