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Fix log-uninitialized-stack bug in rend_service_intro_established.

Fixes bug 23490; bugfix on 0.2.7.2-alpha.

TROVE-2017-008
CVE-2017-0380
Nick Mathewson 6 years ago
parent
commit
09ea89764a
2 changed files with 7 additions and 2 deletions
  1. 5 0
      changes/trove-2017-008
  2. 2 2
      src/or/rendservice.c

+ 5 - 0
changes/trove-2017-008

@@ -0,0 +1,5 @@
+  o Major bugfixes (security, hidden services, loggging):
+    - Fix a bug where we could log uninitialized stack when a certain
+      hidden service error occurred while SafeLogging was disabled.
+      Fixes bug #23490; bugfix on 0.2.7.2-alpha.
+      This is also tracked as TROVE-2017-008 and CVE-2017-0380.

+ 2 - 2
src/or/rendservice.c

@@ -3372,6 +3372,8 @@ rend_service_intro_established(origin_circuit_t *circuit,
              (unsigned)circuit->base_.n_circ_id);
     goto err;
   }
+  base32_encode(serviceid, REND_SERVICE_ID_LEN_BASE32 + 1,
+                rend_pk_digest, REND_SERVICE_ID_LEN);
   /* We've just successfully established a intro circuit to one of our
    * introduction point, account for it. */
   intro = find_intro_point(circuit);
@@ -3388,8 +3390,6 @@ rend_service_intro_established(origin_circuit_t *circuit,
   service->desc_is_dirty = time(NULL);
   circuit_change_purpose(TO_CIRCUIT(circuit), CIRCUIT_PURPOSE_S_INTRO);
 
-  base32_encode(serviceid, REND_SERVICE_ID_LEN_BASE32 + 1,
-                rend_pk_digest, REND_SERVICE_ID_LEN);
   log_info(LD_REND,
            "Received INTRO_ESTABLISHED cell on circuit %u for service %s",
            (unsigned)circuit->base_.n_circ_id, serviceid);