ticket: 6734

version_fixed: 1.8.2
status: resolved

pull up r24102 from trunk

 ------------------------------------------------------------------------
 r24102 | ghudson | 2010-05-24 22:44:45 -0400 (Mon, 24 May 2010) | 11 lines

 ticket: 6734
 subject: FAST negotiation could erroneously succeed
 target_version: 1.8.2
 tags: pullup

 When FAST negotiation is performed against an older KDC
 (rep->enc_part2->flags & TKT_FLG_ENC_PA_REP not set),
 krb5int_fast_verify_nego did not set the value of *fast_avail, causing
 stack garbage to be used in init_creds_step_reply.  Initialize
 *fast_avail at the beginning of the function per coding practices.

git-svn-id: svn://anonsvn.mit.edu/krb5/branches/krb5-1-8@24111 dc483132-0cff-0310-8789-dd5450dbe970

src/lib/krb5/krb/fast.c

@@ -572,6 +572,7 @@ krb5int_fast_verify_nego(krb5_context context,
     krb5_data scratch;
     krb5_boolean valid;
 
+    *fast_avail = FALSE;
     if (rep->enc_part2->flags& TKT_FLG_ENC_PA_REP) {
         pa = krb5int_find_pa_data(context, rep->enc_part2->enc_padata,
                                   KRB5_ENCPADATA_REQ_ENC_PA_REP);