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r12919: Ensure we never 'extend' the session key length, or fill in past the

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length of the (possibly null) pointer.

In reality this should come to us either 16 or 0 bytes in length, but
this is the safest test.

This is bug 3401 in Samba3, thanks to Yau Lam Yiu <yiuext at cs.ust.hk>

Andrew Bartlett
This commit is contained in:
Andrew Bartlett
2006-01-13 23:08:20 +00:00
committed by Gerald (Jerry) Carter
parent e13cb0ab17
commit f3aa702944
1 changed files with 5 additions and 1 deletions
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6
source/auth/ntlmssp/ntlmssp.c
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@@ -279,11 +279,15 @@ void ntlmssp_handle_neg_flags(struct gensec_ntlmssp_state *gensec_ntlmssp_state,
void ntlmssp_weaken_keys(struct gensec_ntlmssp_state *gensec_ntlmssp_state)
{
/* Nothing to weaken. We certainly don't want to 'extend' the length... */
if (!gensec_ntlmssp_state->session_key.length < 8) {
return;
}
/* Key weakening not performed on the master key for NTLM2
and does not occour for NTLM1. Therefore we only need
to do this for the LM_KEY.
*/
if (gensec_ntlmssp_state->neg_flags & NTLMSSP_NEGOTIATE_LM_KEY) {
if (gensec_ntlmssp_state->neg_flags & NTLMSSP_NEGOTIATE_128) {