fix for CVE-2011-0014 "OCSP stapling vulnerability";

ok markus@ jasper@ miod@

AFAIK nothing in base uses this, though apache2 from ports may be affected.

1 files changed, 7 insertions, 1 deletions

diff --git a/src/lib/libssl/t1_lib.c b/src/lib/libssl/t1_lib.c
index 833fc172de..0baa70663a 100644
--- a/src/lib/libssl/t1_lib.c
+++ b/src/lib/libssl/t1_lib.c
@@ -917,6 +917,7 @@ int ssl_parse_clienthello_tlsext(SSL *s, unsigned char **p, unsigned char *d, in
                                                 }
                                         n2s(data, idsize);
                                         dsize -= 2 + idsize;
+                                        size -= 2 + idsize;
                                         if (dsize < 0)
                                                 {
                                                 *al = SSL_AD_DECODE_ERROR;
@@ -955,9 +956,14 @@ int ssl_parse_clienthello_tlsext(SSL *s, unsigned char **p, unsigned char *d, in
                                         }
 
                                 /* Read in request_extensions */
+                                if (size < 2)
+                                        {
+                                        *al = SSL_AD_DECODE_ERROR;
+                                        return 0;
+                                        }
                                 n2s(data,dsize);
                                 size -= 2;
-                                if (dsize > size) 
+                                if (dsize != size)
                                         {
                                         *al = SSL_AD_DECODE_ERROR;
                                         return 0;