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Don't change version number if session established

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When sending an invalid version number alert don't change the
version number to the client version if a session is already
established.

Thanks to Marek Majkowski for additional analysis of this issue.

PR#3191
This commit is contained in:
Dr. Stephen Henson 2013-12-24 18:17:00 +00:00
parent 1c2c5e402a
commit f3dcc8411e
2 changed files with 3 additions and 2 deletions
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2
ssl/s3_pkt.c
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@ -335,7 +335,7 @@ fprintf(stderr, "Record type=%d, Length=%d\n", rr->type, rr->length);
if (version != s->version)
{
SSLerr(SSL_F_SSL3_GET_RECORD,SSL_R_WRONG_VERSION_NUMBER);
if ((s->version & 0xFF00) == (version & 0xFF00))
if ((s->version & 0xFF00) == (version & 0xFF00) && !s->enc_write_ctx && !s->write_hash)
/* Send back error using their minor version number :-) */
s->version = (unsigned short)version;
al=SSL_AD_PROTOCOL_VERSION;

3
ssl/s3_srvr.c
View File

@ -958,7 +958,8 @@ int ssl3_get_client_hello(SSL *s)
(s->version != DTLS1_VERSION && s->client_version < s->version))
{
SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO, SSL_R_WRONG_VERSION_NUMBER);
if ((s->client_version>>8) == SSL3_VERSION_MAJOR)
if ((s->client_version>>8) == SSL3_VERSION_MAJOR &&
!s->enc_write_ctx && !s->write_hash)
{
/* similar to ssl3_get_record, send alert using remote version number */
s->version = s->client_version;