20 May
2008
20 May
'08
4:44 a.m.
Hello,
below is the log you request
======================================
May 20 10:23:05 [3652] DBG:ldap:ldap_connect: [inria]: LDAP bind successful
(ldap_host [ldap://ldapmaster.inrialpes.fr])
May 20 10:25:36 [3652] DBG:core:parse_msg: SIP Request:
May 20 10:25:36 [3652] DBG:core:parse_msg: method: <REGISTER>
May 20 10:25:36 [3652] DBG:core:parse_msg: uri: <sip:inrialpes.fr>
May 20 10:25:36 [3652] DBG:core:parse_msg: version: <SIP/2.0>
May 20 10:25:36 [3652] DBG:core:parse_headers: flags=2
May 20 10:25:36 [3652] DBG:core:parse_via_param: found param type 232,
<branch> = <z9hG4bK-d87543-1154d43f445f6e1a-3--d87543->; state=6
May 20 10:25:36 [3652] DBG:core:parse_via_param: found param type 235,
<rport> = <n/a>; state=17
May 20 10:25:36 [3652] DBG:core:parse_via: end of header reached, state=5
May 20 10:25:36 [3652] DBG:core:parse_headers: via found, flags=2
May 20 10:25:36 [3652] DBG:core:parse_headers: this is the first via
May 20 10:25:36 [3652] DBG:core:receive_msg: After parse_msg...
May 20 10:25:36 [3652] DBG:core:receive_msg: preparing to run routing
scripts...
May 20 10:25:36 [3652] DBG:core:parse_headers: flags=100
May 20 10:25:36 [3652] DBG:maxfwd:is_maxfwd_present: value = 70
May 20 10:25:36 [3652] DBG:core:parse_headers: flags=8
May 20 10:25:36 [3652] DBG:core:parse_to: end of header reached, state=10
May 20 10:25:36 [3652] DBG:core:parse_to: display={"alali"}, ruri={
sip:alali@inrialpes.fr <sip%3Aalali(a)inrialpes.fr>}
May 20 10:25:36 [3652] DBG:core:get_hdr_field: <To> [33]; uri=[
sip:alali@inrialpes.fr <sip%3Aalali(a)inrialpes.fr>]
May 20 10:25:36 [3652] DBG:core:get_hdr_field: to body ["alali"<
sip:alali@inrialpes.fr <sip%3Aalali(a)inrialpes.fr>>
]
May 20 10:25:36 [3652] DBG:uri:has_totag: no totag
May 20 10:25:36 [3652] DBG:core:parse_headers: flags=78
May 20 10:25:36 [3652] DBG:core:get_hdr_field: cseq <CSeq>: <1>
<REGISTER>
May 20 10:25:36 [3652] DBG:tm:t_lookup_request: start searching: hash=34958,
isACK=0
May 20 10:25:36 [3652] DBG:tm:matching_3261: RFC3261 transaction matching
failed
May 20 10:25:36 [3652] DBG:tm:t_lookup_request: no transaction found
May 20 10:25:36 [3652] DBG:core:grep_sock_info: checking if host==us: 12==14
&& [inrialpes.fr] == [194.199.18.159]
May 20 10:25:36 [3652] DBG:core:grep_sock_info: checking if port 5060
matches port 5060
May 20 10:25:36 [3652] DBG:core:grep_sock_info: checking if host==us: 12==14
&& [inrialpes.fr] == [194.199.18.159]
May 20 10:25:36 [3652] DBG:core:grep_sock_info: checking if port 5060
matches port 5060
May 20 10:25:36 [3652] DBG:core:parse_headers: flags=ffffffffffffffff
May 20 10:25:36 [3652] DBG:core:get_hdr_field: content_length=0
May 20 10:25:36 [3652] DBG:core:get_hdr_field: found end of header
May 20 10:25:36 [3652] DBG:auth:build_auth_hf: 'WWW-Authenticate: Digest
realm="inrialpes.fr",
nonce="48328c2cfe3d852ecb1ff2f1fc7e378022046d34"
'
May 20 10:25:36 [3652] DBG:core:parse_headers: flags=ffffffffffffffff
May 20 10:25:36 [3652] DBG:core:check_via_address: params 194.199.18.152,
194.199.18.152, 0
May 20 10:25:36 [3652] DBG:core:destroy_avp_list: destroying list (nil)
May 20 10:25:36 [3652] DBG:core:receive_msg: cleaning up
May 20 10:25:39 [3652] DBG:core:parse_msg: SIP Request:
May 20 10:25:39 [3652] DBG:core:parse_msg: method: <REGISTER>
May 20 10:25:39 [3652] DBG:core:parse_msg: uri: <sip:inrialpes.fr>
May 20 10:25:39 [3652] DBG:core:parse_msg: version: <SIP/2.0>
May 20 10:25:39 [3652] DBG:core:parse_headers: flags=2
May 20 10:25:39 [3652] DBG:core:parse_via_param: found param type 232,
<branch> = <z9hG4bK-d87543-4b05271d9943dd31-3--d87543->; state=6
May 20 10:25:39 [3652] DBG:core:parse_via_param: found param type 235,
<rport> = <n/a>; state=17
May 20 10:25:39 [3652] DBG:core:parse_via: end of header reached, state=5
May 20 10:25:39 [3652] DBG:core:parse_headers: via found, flags=2
May 20 10:25:39 [3652] DBG:core:parse_headers: this is the first via
May 20 10:25:39 [3652] DBG:core:receive_msg: After parse_msg...
May 20 10:25:39 [3652] DBG:core:receive_msg: preparing to run routing
scripts...
May 20 10:25:39 [3652] DBG:core:parse_headers: flags=100
May 20 10:25:39 [3652] DBG:maxfwd:is_maxfwd_present: value = 70
May 20 10:25:39 [3652] DBG:core:parse_headers: flags=8
May 20 10:25:39 [3652] DBG:core:parse_to: end of header reached, state=10
May 20 10:25:39 [3652] DBG:core:parse_to: display={"alali"}, ruri={
sip:alali@inrialpes.fr <sip%3Aalali(a)inrialpes.fr>}
May 20 10:25:39 [3652] DBG:core:get_hdr_field: <To> [33]; uri=[
sip:alali@inrialpes.fr <sip%3Aalali(a)inrialpes.fr>]
May 20 10:25:39 [3652] DBG:core:get_hdr_field: to body ["alali"<
sip:alali@inrialpes.fr <sip%3Aalali(a)inrialpes.fr>>
]
May 20 10:25:39 [3652] DBG:uri:has_totag: no totag
May 20 10:25:39 [3652] DBG:core:parse_headers: flags=78
May 20 10:25:39 [3652] DBG:core:get_hdr_field: cseq <CSeq>: <2>
<REGISTER>
May 20 10:25:39 [3652] DBG:tm:t_lookup_request: start searching: hash=34955,
isACK=0
May 20 10:25:39 [3652] DBG:tm:matching_3261: RFC3261 transaction matching
failed
May 20 10:25:39 [3652] DBG:tm:t_lookup_request: no transaction found
May 20 10:25:39 [3652] DBG:core:grep_sock_info: checking if host==us: 12==14
&& [inrialpes.fr] == [194.199.18.159]
May 20 10:25:39 [3652] DBG:core:grep_sock_info: checking if port 5060
matches port 5060
May 20 10:25:39 [3652] DBG:core:grep_sock_info: checking if host==us: 12==14
&& [inrialpes.fr] == [194.199.18.159]
May 20 10:25:39 [3652] DBG:core:grep_sock_info: checking if port 5060
matches port 5060
May 20 10:25:39 [3652] DBG:core:parse_headers: flags=ffffffffffffffff
May 20 10:25:39 [3652] DBG:core:get_hdr_field: content_length=0
May 20 10:25:39 [3652] DBG:core:get_hdr_field: found end of header
May 20 10:25:39 [3652] DBG:core:parse_to_param: tag=e66a6272
May 20 10:25:39 [3652] DBG:core:parse_to: end of header reached, state=29
May 20 10:25:39 [3652] DBG:core:parse_to: display={"alali"}, ruri={
sip:alali@inrialpes.fr <sip%3Aalali(a)inrialpes.fr>}
May 20 10:25:39 [3652] DBG:ldap:ldap_url_search: LDAP URL parsed into
session_name [inria], base [ou=People,dc=inrialpes,dc=fr], scope [1], filter
[(uid=alali)]
May 20 10:25:39 [3652] DBG:ldap:lds_search: [inria]: performing LDAP search:
dn [ou=People,dc=inrialpes,dc=fr], scope [1], filter [(uid=alali)],
client_timeout [5000000] usecs
May 20 10:25:39 [3652] DBG:ldap:ldap_params_search: [inria]: [1] LDAP
entries found
May 20 10:25:39 [3652] DBG:auth:check_nonce: comparing
[48328c2cfe3d852ecb1ff2f1fc7e378022046d34] and
[48328c2cfe3d852ecb1ff2f1fc7e378022046d34]
May 20 10:25:39 [3652] DBG:auth:check_response: our result =
'f2703eead969f071b5cbf724876b555c'
May 20 10:25:39 [3652] DBG:auth:check_response: authorization failed
May 20 10:25:39 [3652] DBG:auth:build_auth_hf: 'WWW-Authenticate: Digest
realm="inrialpes.fr",
nonce="48328c2f395ff6d2cf662b281063ff20ac03b62f"
================================================
you can clearly see that the response generated by the server will not match
the one received from UAC. i sniffed the network packets to see what is
going on and i found that the LDAP server return the password in this
formate ( {MD5} blablabla ). do not you think that the server took it all as
password (including {MD5} string)?
regards,
Ahmed ALALI
On Mon, May 19, 2008 at 9:26 PM, Daniel-Constantin Mierla <miconda(a)gmail.com>
wrote:
Hello,
I had a quick look at the code and the module should work with HA1 in the
PV and calculate_ha1=0. Can you set the debug =5 and send the log to me for
such case (the 3 in your list). It will help to troubleshoot quickly.
Cheers,
Daniel
On 05/19/08 15:05, Ahmed Huraimel wrote:
Hello,
i am successfully integrated an openLDAP server with my openSER SIP proxy
server. however i am facing a security problem. let me explain it briefly.
**** Successful Registration with password save as clear in openLDAP DB
****
* # Configration #
- user name was stored in clear in openSER database
- modparam("auth", "calculate_ha1", 1) which means the server will
assume
that the "password_spec" pseudo-variable contains plaintext passwords and it
will calculate HA1 strings on the fly.
# Senario #
- after the UAC receives Authentication request he will build the response
= MD5(username + MD5(passowrd) + realm + nonce)
- then the server will build the challenge by searching the the user in
the database and retrieving the password in clear then hash the password
with MD5 build the challenge such that challenge=MD5(username +
MD5(passowrd) + realm + nonce) . .
- by comparing the the response the with the challenge the user will be
authenticated.
- *it works *
**** Successful Registration with password save as MD5 in openLDAP DB ****
* # Configration #
- user name was stored in MD5 in openSER database
- modparam("auth", "calculate_ha1", 0) which means the server assumes
the
pseudo-variable contains the HA1 strings directly and will not calculate
them.
# Senario #
- after the UAC receives Authentication request he will build the response
= MD5(username + MD5(password) + realm + nonce)
- then the server will build the challenge by searching the the user in
the database and retrieving the password in MD5 then challenge such that
challenge=MD5(username + MD5(password) + realm + nonce) .
- by comparing the the response the with the challenge the user will be
authenticated.
- *401 unauthorized !!!!
***** CONCLUSION ****
*there for possible scenarios:
1- password clear + calculate_ha1= 0 ==> 401 unauthorized !!!!
2- password clear + calculate_ha1= 1 ==> Authorized
3- password MD5 + calculate_ha1= 0 ==> 401 unauthorized !!!!
4- password MD5 + calculate_ha1= 1 ==> 401 unauthorized !!!!
*
*-----------------------------------------------------------------------------------------
*
asuumptions:
*1- the password might be not hashed. if so then why modparam("auth",
"calculate_ha1", ) used? does it mean that the password might be received
hashed or not?
_2- in scenario(2) the sip server hash the password by setting
calculate_ha1= 1. if the password is already hashed in the database then
scenario(3) should work unless there is a conflict with the hash. is this
might be related to hash type or size?_ or something else that i do not
know!!!
*question*:
1- why scenario(3) does not work? where might be the problem?
2- what to do if i want to change the hash algorithm used? for example i
need to SSH1 instead of MD5 because nowadays MD5 is proved to be weak
algorithm
regards,
Ahmed ALALI
------------------------------------------------------------------------
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