Amazing-Mirror/fragattacks
1
0
Fork 0
mirror of https://github.com/vanhoefm/fragattacks.git synced 2024-11-25 08:48:31 -05:00
Code Issues Projects Releases Wiki Activity

EAP-pwd peer: Fix error path for unexpected Confirm message

Browse Source 
If the Confirm message is received from the server before the Identity
exchange has been completed, the group has not yet been determined and
data->grp is NULL. The error path in eap_pwd_perform_confirm_exchange()
did not take this corner case into account and could end up
dereferencing a NULL pointer and terminating the process if invalid
message sequence is received. (CVE-2015-5316)

Signed-off-by: Jouni Malinen <j@w1.fi>
This commit is contained in:
Jouni Malinen 2015-11-01 19:35:44 +02:00
parent bef802ece0
commit 95577884ca
1 changed files with 2 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
src/eap_peer/eap_pwd.c
View File

@ -774,7 +774,8 @@ eap_pwd_perform_confirm_exchange(struct eap_sm *sm, struct eap_pwd_data *data,
wpabuf_put_data(data->outbuf, conf, SHA256_MAC_LEN);
fin:
bin_clear_free(cruft, BN_num_bytes(data->grp->prime));
if (data->grp)
bin_clear_free(cruft, BN_num_bytes(data->grp->prime));
BN_clear_free(x);
BN_clear_free(y);
if (data->outbuf == NULL) {