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| author | Andrew Bartlett <abartlet@samba.org> | 2010-09-16 14:37:20 +1000 |
|---|---|---|
| committer | Andrew Tridgell <tridge@samba.org> | 2010-09-16 21:09:17 +1000 |
| commit | 6832d5e9334f93d2b41fa50580379a2381311748 (patch) | |
| tree | c4cb065d6ca93f4f367a2329b14a6eac90d163af /source3/utils/ntlm_auth.c | |
| parent | d5a4e53ad8dd572b9469530dfcd37601e2905a88 (diff) | |
| download | samba-6832d5e9334f93d2b41fa50580379a2381311748.tar.gz samba-6832d5e9334f93d2b41fa50580379a2381311748.tar.bz2 samba-6832d5e9334f93d2b41fa50580379a2381311748.zip | |
libcli/auth/ntlmssp Be clear about talloc parents for session keys
The previous API was not clear as to who owned the returned session key.
This fixes a valgrind-found use-after-free in the NTLMSSP key derivation code,
and avoids making allocations - we steal and zero instead.
Andrew Bartlett
Signed-off-by: Andrew Tridgell <tridge@samba.org>
Diffstat (limited to 'source3/utils/ntlm_auth.c')
| -rw-r--r-- | source3/utils/ntlm_auth.c | 12 |
1 files changed, 7 insertions, 5 deletions
diff --git a/source3/utils/ntlm_auth.c b/source3/utils/ntlm_auth.c index 82819cf145..38ed9f7c9b 100644 --- a/source3/utils/ntlm_auth.c +++ b/source3/utils/ntlm_auth.c @@ -565,7 +565,8 @@ static NTSTATUS contact_winbind_change_pswd_auth_crap(const char *username, return nt_status; } -static NTSTATUS winbind_pw_check(struct ntlmssp_state *ntlmssp_state, DATA_BLOB *user_session_key, DATA_BLOB *lm_session_key) +static NTSTATUS winbind_pw_check(struct ntlmssp_state *ntlmssp_state, TALLOC_CTX *mem_ctx, + DATA_BLOB *user_session_key, DATA_BLOB *lm_session_key) { static const char zeros[16] = { 0, }; NTSTATUS nt_status; @@ -585,13 +586,13 @@ static NTSTATUS winbind_pw_check(struct ntlmssp_state *ntlmssp_state, DATA_BLOB if (NT_STATUS_IS_OK(nt_status)) { if (memcmp(lm_key, zeros, 8) != 0) { - *lm_session_key = data_blob_talloc(ntlmssp_state, NULL, 16); + *lm_session_key = data_blob_talloc(mem_ctx, NULL, 16); memcpy(lm_session_key->data, lm_key, 8); memset(lm_session_key->data+8, '\0', 8); } if (memcmp(user_sess_key, zeros, 16) != 0) { - *user_session_key = data_blob_talloc(ntlmssp_state, user_sess_key, 16); + *user_session_key = data_blob_talloc(mem_ctx, user_sess_key, 16); } ntlmssp_state->callback_private = talloc_strdup(ntlmssp_state, unix_name); @@ -609,14 +610,15 @@ static NTSTATUS winbind_pw_check(struct ntlmssp_state *ntlmssp_state, DATA_BLOB return nt_status; } -static NTSTATUS local_pw_check(struct ntlmssp_state *ntlmssp_state, DATA_BLOB *user_session_key, DATA_BLOB *lm_session_key) +static NTSTATUS local_pw_check(struct ntlmssp_state *ntlmssp_state, TALLOC_CTX *mem_ctx, + DATA_BLOB *user_session_key, DATA_BLOB *lm_session_key) { NTSTATUS nt_status; struct samr_Password lm_pw, nt_pw; nt_lm_owf_gen (opt_password, nt_pw.hash, lm_pw.hash); - nt_status = ntlm_password_check(ntlmssp_state, + nt_status = ntlm_password_check(mem_ctx, true, true, 0, &ntlmssp_state->chal, &ntlmssp_state->lm_resp, |