August 2015 - openldap-bugs

Re: (ITS#8054) Operation duration logging

by hyc＠symas.com

clem.oudot(a)gmail.com wrote: > 2015-02-11 18:33 GMT+01:00 <h.b.furuseth(a)usit.uio.no>: >> On 11. feb. 2015 12:38, Michael Str=C3=B6der wrote: >>> h.b.furuseth(a)usit.uio.no wrote: >>>> Cool feture, but please use fewer characteres in the already >>>> bloated log. How about "time=3D<integer>us" or even omit the "us"? >>> >>> +1 >>> >>> But 'time' sounds a bit general. >>> How about 'tdu' or even 'td' as abbreviation for "time duration"? >> >> I don't think so. You can't see from that what it means unless you >> already know, so you have to look it up just to see if you're >> interested. 'time' you can decide to look up if you are interested. >> > > Seems other LDAP servers have choosen 'etime' (see > http://ludopoitou.com/2015/02/24/about-auditing-ldap-operations/). Why > not try to use the same word? etime is fine with me. The other problem here is that it's counting duration from when slapd received the request (which is fine) but usually the op gets queued immediately after. For this etime to be useful we need to know both the amount of time spent queued, and the amount of time spent actually executing. qtime and etime? -- -- Howard Chu CTO, Symas Corp. http://www.symas.com Director, Highland Sun http://highlandsun.com/hyc/ Chief Architect, OpenLDAP http://www.openldap.org/project/

8 years, 1 month

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RE: (ITS#8212) slapd stops on consumer node

by Steen.Brandtmar＠ibapplications.com

--_003_DB4PR03MB0911E60223F1AE5F6D332DA881750DB4PR03MB0911eurp_ Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Hi I did an upgrade to 2.4.41 on the consumer node. Then restarted. Consumer IP =3D 10.0.100.6 Provider IP=3D10.0.100.5 Then - on consumer - I executed this command: /usr/local/bin/ldappasswd -x -D uid=3Dxxxxxx,ou=3DPeople,dc=3Diba,dc=3Dloca= l -w oldpasswod -H ldap://10.0.100.6 -Z -s newpassword uid=3Dxxxxxx,ou=3DPe= ople,dc=3Diba,dc=3Dlocal ldap_result: Can't contact LDAP server (-1) And logfile writes: Aug 4 16:33:40 mgmt1 slapd[17418]: conn=3D1141 fd=3D18 ACCEPT from IP=3D10= .0.100.6:42621 (IP=3D0.0.0.0:389) Aug 4 16:33:40 mgmt1 slapd[17418]: conn=3D1141 op=3D0 EXT oid=3D1.3.6.1.4.= 1.1466.20037 Aug 4 16:33:40 mgmt1 slapd[17418]: conn=3D1141 op=3D0 STARTTLS Aug 4 16:33:40 mgmt1 slapd[17418]: conn=3D1141 op=3D0 RESULT oid=3D err=3D= 0 text=3D Aug 4 16:33:40 mgmt1 slapd[17418]: conn=3D1141 fd=3D18 TLS established tls= _ssf=3D128 ssf=3D128 Aug 4 16:33:40 mgmt1 slapd[17418]: conn=3D1141 op=3D1 BIND dn=3D"uid=3Dxxx= xxx,ou=3DPeople,dc=3Diba,dc=3Dlocal" method=3D128 Aug 4 16:33:40 mgmt1 slapd[17418]: conn=3D1141 op=3D1 BIND dn=3D"uid=3Dxxx= xxx,ou=3DPeople,dc=3Diba,dc=3Dlocal" mech=3DSIMPLE ssf=3D0 Aug 4 16:33:40 mgmt1 slapd[17418]: ppolicy_bind: Entry uid=3Dxxxxxx,ou=3DP= eople,dc=3Diba,dc=3Dlocal has an expired password: 6 grace logins Aug 4 16:33:41 mgmt1 slapd[17418]: conn=3D1141 op=3D1 RESULT tag=3D97 err= =3D0 text=3D Aug 4 16:33:41 mgmt1 slapd[17418]: conn=3D1141 op=3D2 EXT oid=3D1.3.6.1.4.= 1.4203.1.11.1 Aug 4 16:33:41 mgmt1 slapd[17418]: conn=3D1141 op=3D2 PASSMOD id=3D"uid=3D= xxxxxx,ou=3DPeople,dc=3Diba,dc=3Dlocal" new and slapd stops. I've attached configs for consumer and provider. Regards Steen Steen Brandtmar +45 2893 5392 Insurance Business Applications Gammel Kongevej 1, 4. sal 1610 K=F8benhavn, Danmark =A0=A0=A0 -----Original Message----- From: openldap-its(a)OpenLDAP.org [mailto:openldap-its@OpenLDAP.org]=20 Sent: 4. august 2015 13:55 To: Steen Brandtmar <Steen.Brandtmar(a)ibapplications.com> Subject: Re: (ITS#8212) slapd stops on consumer node *** THIS IS AN AUTOMATICALLY GENERATED REPLY *** Thanks for your report to the OpenLDAP Issue Tracking System. Your report = has been assigned the tracking number ITS#8212. One of our support engineers will look at your report in due course. Note that this may take some time because our support engineers are volunte= ers. They only work on OpenLDAP when they have spare time. If you need to provide additional information in regards to your issue repo= rt, you may do so by replying to this message. Note that any mail sent to = openldap-its(a)openldap.org with (ITS#8212) in the subject will automatically= be attached to the issue report. mailto:openldap-its@openldap.org?subject=3D(ITS#8212) You may follow the progress of this report by loading the following URL in = a web browser: http://www.OpenLDAP.org/its/index.cgi?findid=3D8212 Please remember to retain your issue tracking number (ITS#8212) on any furt= her messages you send to us regarding this report. If you don't then you'l= l just waste our time and yours because we won't be able to properly track = the report. Please note that the Issue Tracking System is not intended to be used to se= ek help in the proper use of OpenLDAP Software. Such requests will be closed. OpenLDAP Software is user supported. http://www.OpenLDAP.org/support/ -------------- Copyright 1998-2007 The OpenLDAP Foundation, All Rights Reserved. --_003_DB4PR03MB0911E60223F1AE5F6D332DA881750DB4PR03MB0911eurp_ Content-Type: text/plain; name="slapd.provider.conf.txt" Content-Description: slapd.provider.conf.txt Content-Disposition: attachment; filename="slapd.provider.conf.txt"; size=4671; creation-date="Tue, 04 Aug 2015 14:52:51 GMT"; modification-date="Tue, 04 Aug 2015 14:52:51 GMT" Content-Transfer-Encoding: base64 Iw0KIyBTZWUgc2xhcGQuY29uZig1KSBmb3IgZGV0YWlscyBvbiBjb25maWd1cmF0aW9uIG9wdGlv bnMuDQojIFRoaXMgZmlsZSBzaG91bGQgTk9UIGJlIHdvcmxkIHJlYWRhYmxlLg0KIw0KaW5jbHVk ZSAgICAgICAgIC91c3IvbG9jYWwvZXRjL29wZW5sZGFwL3NjaGVtYS9jb3JlLnNjaGVtYQ0KaW5j bHVkZSAgICAgICAgIC91c3IvbG9jYWwvZXRjL29wZW5sZGFwL3NjaGVtYS9jb3NpbmUuc2NoZW1h DQppbmNsdWRlICAgICAgICAgL3Vzci9sb2NhbC9ldGMvb3BlbmxkYXAvc2NoZW1hL25pcy5zY2hl bWENCmluY2x1ZGUgICAgICAgICAvdXNyL2xvY2FsL2V0Yy9vcGVubGRhcC9zY2hlbWEvaW5ldG9y 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8 years, 1 month

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Re: (ITS#8212) slapd stops on consumer node

by michael＠stroeder.com

Steen.brandtmar(a)ibapplications.com wrote: > We are running two servers in mirrormode. > When we run ldappasswd on provider node all is OK and passwords are changed in > bdb. Logfile shows PASSMOD on relevant uid. > When we run the same ldappasswd command on consumer node, slapd stops abruptly > on this node and must be started manually. Could you please retry with 2.4.41? If it's still a problem with 2.4.41 a stripped down config for reproducing the issue would be good. Ciao, Michael.

8 years, 1 month

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(ITS#8212) slapd stops on consumer node

by Steen.brandtmar＠ibapplications.com

Full_Name: Steen Brandtmar Version: 2.4.40 OS: Linux Ubuntu 12.04 URL: ftp://ftp.openldap.org/incoming/ Submission from: (NULL) (86.48.99.242) Hi We are running two servers in mirrormode. When we run ldappasswd on provider node all is OK and passwords are changed in bdb. Logfile shows PASSMOD on relevant uid. When we run the same ldappasswd command on consumer node, slapd stops abruptly on this node and must be started manually.

8 years, 1 month

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(ITS#8211) ssf does not reflect actual security of connection

by hkario＠redhat.com

Full_Name: Hubert Kario Version: all OS: Linux URL: Submission from: (NULL) (213.175.37.10) Section "14.2.1. Security Strength Factors"[1] states "A SSF greater than one (>1) roughly correlates to the effective encryption key length.". This is not the case more often than not. Problem is that ssf as it is calculated now doesn't take into consideration all the cryptographic primitives in use. In other words, a connection that uses a 512 bit RSA certificates and negotiates TLS_RSA_WITH_AES_128_CBC_SHA (AES256-SHA) certainly does not provide security equivalent to "modern strong ciphers"[2][3] and should be awarded "256". Similarly a connection that uses 512 bit DH parameters and negotiates TLS_DHE_RSA_WITH_AES_256_CBC_SHA (DHE-RSA-AES256-SHA) does not provide security that should be awarded "256"[5]. In fact, recommending use of high key sizes[2] will cause the connection to use _less_ secure CBC ciphersuites[5] with clients that support AEAD ciphersuites with AES-128 only (like Thunderbird and Firefox do). Section 8.4.9[2] also calls RC4 a "modern strong cipher", most cryptographers disagree[6]. So I think either: 1). ssf needs to be redefined to consider any value higher that "2" to be equal, and requiring the server administrators to enable only ciphersuites they consider secure, or 2). the whole code that calculates ssf needs to be updated to take into account many more things: * use of AEAD * use of Encrypt-then-MAC * the protocol version used (both because TLS1.0 specific attacks[7] as wewell as the use of SHA1+MD5 for signatures which limits the connection security to 80 bits[8] (optimistically) if client certificates are in use in TLS < 1.2) * encryption algorithm on session tickets * current state of attacks on a given ciphersuite * the size of ECDHE curve, FFDHE prime or server certificate key size, depending on ciphersuite negotiated * the signature algorithm used in Certificate Verify message * the key size of client certificate * the signature on the client certificate and key sizes in CA certificates * the HMAC used * key size of the symmetric cipher * (probably other things I didn't think about) 1 - http://www.openldap.org/doc/admin24/security.html 2 - http://w.w.openldap.org/doc/admin24/access-control.html section 8.4.9 3 - https://freakattack.com/ 4 - https://weakdh.org/ 5 - http://www.isg.rhul.ac.uk/tls/Lucky13.html 6 - https://tools.ietf.org/html/rfc7465 7 - https://en.wikipedia.org/wiki/Transport_Layer_Security#BEAST_attack 8 - https://www.iacr.org/cryptodb/archive/2004/CRYPTO/1472/1472.pdf

8 years, 1 month

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Re: (ITS#8209) Broken MDB_CP_COMPACT threading

by h.b.furuseth＠usit.uio.no

Okay, that was one confused ITS in response to equally confused code. Trying again. Draft fixes in my updated branch "mdb/copyfd1" (non-fast-forward). It's broken if mdb_env_copythr() has a write error: * copyfd1 can (A) overrun buffer mc_wlen, and (B) hang, if if cthr_toggle() is in cond_wait() when the error occurs: It sets mc_new and returns success. cwalk() proceeds to write at mc_wbuf+mc_wlen, but copythr() did not reset mc_wlen. Then copyfd1() waits for the now-dead copythr() to clear mc_new. Fixes: (A) join the if(mc_status) and while(mc_new==1) in cthr_toggle. (B) Drop the wait before THREAD_FINISH(), it seems pointless. Both Posix and Windows doc say that THREAD_FINISH waits. Or if Windows needs it for some reason, then copythr must live until it receives mc_new=-1, so it can set mc_new=0. * copyfd1() loses any error from the final cthr_toggle(). Fix: Return rc ? rc : my.mc_status. Tested on Linux with fake write errors, with/without fixes. While not a bug, I also see no point in both threads' initial waits. copyfd1() can own the buffer initially (set mc_new=0). I'm guessing the waits are there because the code tries to guide the threads from step to step, but it broke because you didn't think of every possibility. It's easier to define and maintain one cond_wait state per thread and keep things consistent there. More on error checking: copyfd1() omits most error checking and the cleanup after errors. E.g. it does not tell copythr to finish if txn_begin fails. Each thread is slow to react to errors in the other thread. I/O will cease quicker if both threads set and check mc_status. If so, mc_status can no longer be part of the cond_wait condition, since it won't be mutex-protected. So the threads might chat a bit more before finishing. I'd rename mc_status -> mc_error. "while (!my->mc_error && ...)" is quite self-explanatory, unlike "while (!my->mc_status && ...)". About lock/unlock outside vs. inside the loop: When outside, copythr() must block for the threads to exchange buffers. When inside, the slowest thread does not block, but there are more lock/unlock/wait calls. Testing: Locks inside is clearly faster on tmpfs. On a regular FS I don't know - it may have been a bit slower, but times varied more than the difference. Finally, cwalk() could re-use the page buffers it mallocs. -- Hallvard

8 years, 1 month

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(ITS#8210) slapd-sock: second subsequent bind fails

by michael＠stroeder.com

Full_Name: Version: OS: URL: Submission from: (NULL) (79.223.48.67) When using *one* connection for sending *two* sequential bind requests slapd-sock blocks. I have a working test case which I can send upon request.

8 years, 1 month

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Re: (ITS#8207) ppolicy: pwdMinLength not checked if pwdInHistory == 0

by michael＠stroeder.com

IanB wrote: > I've attempted to test with OpenLDAP 2.4.41 but cannot get password changing > to work at all, constantly getting error: "passwd: Authentication token > manipulation error" Greping through the source this message is output from slapo-nssov. Are you sure that you re-built and installed slapo-nssov from 2.4.41? Also you should always first test with ldappasswd command-line tool to avoid false interaction with other software. What else do you have configured? > Unfortunately, I cannot spend more time on this now. What does that mean? If you don't want to work on this ITS any further it's probably the best to close it. Ciao, Michael.

8 years, 1 month

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Re: (ITS#8207) ppolicy: pwdMinLength not checked if pwdInHistory == 0

by porjo38＠yahoo.com.au

I've attempted to test with OpenLDAP 2.4.41 but cannot get password changing to work at all, constantly getting error: "passwd: Authentication token manipulation error" Unfortunately, I cannot spend more time on this now. On 30/07/15 03:01, Michael Ströder wrote: > porjo38(a)yahoo.com.au wrote: >> Using password policy overlay, pwdMinLength is not checked when pwdInHistory == >> 0. > > I tried to reproduce this with my local OpenLDAP 2.4.41 installation. > In one case I thought to see this but I could not reproduce all the time. > Maybe there's another condition for this to happen. > > Could you please also test with release 2.4.41? > > And please also post the entry with the password (and relevant pwd* attrs) and > the pwdPolicy entry used, both as LDIF (minus sensitive data). > > Ciao, Michael. >

8 years, 1 month

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openldap-bugs August 2015