diff options
Diffstat (limited to 'source/libsmb/clientgen.c')
| -rw-r--r-- | source/libsmb/clientgen.c | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/source/libsmb/clientgen.c b/source/libsmb/clientgen.c index 68ecb131b11..c6cef087047 100644 --- a/source/libsmb/clientgen.c +++ b/source/libsmb/clientgen.c @@ -117,6 +117,26 @@ BOOL cli_receive_smb(struct cli_state *cli) } if (!cli_check_sign_mac(cli)) { + /* + * If we get a signature failure in sessionsetup, then + * the server sometimes just reflects the sent signature + * back to us. Detect this and allow the upper layer to + * retrieve the correct Windows error message. + */ + if (CVAL(cli->outbuf,smb_com) == SMBsesssetupX && + (smb_len(cli->inbuf) > (smb_ss_field + 8 - 4)) && + (SVAL(cli->inbuf,smb_flg2) & FLAGS2_SMB_SECURITY_SIGNATURES) && + memcmp(&cli->outbuf[smb_ss_field],&cli->inbuf[smb_ss_field],8) == 0 && + cli_is_error(cli)) { + + /* + * Reflected signature on login error. + * Set bad sig but don't close fd. + */ + cli->smb_rw_error = READ_BAD_SIG; + return True; + } + DEBUG(0, ("SMB Signature verification failed on incoming packet!\n")); cli->smb_rw_error = READ_BAD_SIG; close(cli->fd); |