IZ64036: WEBSPHERE MQ V7.0.1 SSL CHANNEL STARTUP IS DELAYED WHEN ATTEMPTING TO CONTACT AN UNREACHABLE OCSP SERVER.
Fixes are available
Closed as program error.
When attempting to start an SSL channel, a user noticed a long delay. SSL message channels remain in BINDING status with a substate of SSLHANDSHK. SSL client applications experience a hang in the MQ connect call. A core dump or debugger output of the delay shows a thread stack similar to the following: #1 0x408682c8 in connect () from /lib/libpthread.so.0 #2 0x41b9e189 in GSKHTTPChannel::OpenChannel_real () from /usr/lib/libgsk7cms.so #3 0x41b9df64 in GSKHTTPChannel::OpenChannel () from /usr/lib/libgsk7cms.so #4 0x41b9dbf4 in GSKHTTPChannel::open () from /usr/lib/libgsk7cms.so #5 0x41b9f9eb in GSKHttpClient::openChannel () from /usr/lib/libgsk7cms.so #6 0x41b9fc58 in GSKHttpClient::reconnectIfNeeded () from /usr/lib/libgsk7cms.so #7 0x41bd5694 in GSKOcspClient::getHttpResponse () from /usr/lib/libgsk7cms.so The exact appearance of the stack may vary between platforms, however the key symptom is a connect() call issued from within GSKOcspClient::getHttpResponse(), inside the gsk_secure_soc_init() function. In most cases, the channel times out and the delay ends after several minutes. What happens next depends upon the MQ OCSPAuthentication configuration setting. When using the default OCSPAuthentication REQUIRED setting, the channel will fail and error AMQ9716 is logged. In the case of client application, reason code MQRC_SSL_INITIALIZATION_ERROR (2393) is returned by the MQ connect call. In the case of a message channel, the channel enters the RETRYING state. When OCSPAuthentication is set to WARN then a warning message AMQ9717 is logged and the channel will start. Both message channels and client applications will then function normally from this point onwards. When OCSPAuthentication is set to OPTIONAL then the channel will start. Both message channels and client applications will then function normally from this point onwards.
The environment variable AMQ_SSL_OCSP_NO_CHECK_AIA can be set. export AMQ_SSL_OCSP_NO_CHECK_AIA=1 This should be done in the shell that the QMgr is started in.
**************************************************************** USERS AFFECTED: Users of WebSphere MQ 220.127.116.11 SSL channels whose digital certificates contain the AuthorityInfoAccess certificate extension and whose MQ systems cannot connect to the OCSP responder URL in the AuthorityInfoAccess certificate extension. The issue can affect both SSL message channels and SSL client applications. Platforms affected: All Distributed (iSeries, all Unix and Windows) **************************************************************** PROBLEM SUMMARY: Some digital certificates used for SSL/TLS channels contain a certificate extension known as AuthorityInfoAccess (or AIA). This certificate extension specifies the location of an OCSP responder server which can be queried to discover if the certificate is revoked. In WebSphere MQ 18.104.22.168, AuthorityInfoAccess certificate extensions are checked by default in order to provide enhanced protection against the use of revoked digital certificates. Users whose existing digital certificates already contained AuthorityInfoAccess extensions might experience SSL connectivity delays if the OCSP responder server is not reachable from within their network.
Users are strongly recommended to enable connectivity to the OCSP responder server identified in their digital certificates so that they can gain the security benefits of the additional revocation checking. WebSphere MQ OCSP queries are made using the HTTP protocol, so use of an HTTP proxy server is one possible solution. Users whose network firewall rules do not permit access to their Certificate Authority's OCSP server and who do not want OCSP checking are recommended to discuss with their Certificate Authority and obtain digital certificates without AuthorityInfoAccess extensions. Digital certificates periodically expire and must be replaced, so expiry time would be suitable to remove any unwanted AuthorityInfoAccess extensions. For cases where an immediate work-around is required to suppress the OCSP check, this APAR introduces a new ini file setting. Users can add the following setting to their SSL stanza: OCSPCheckExtensions=no This can be set in the client ini file (for example, mqclient.ini) or in the queue manager configuration (for example, qm.ini or the Windows registry equivalent). With this setting in place then WebSphere MQ will ignore AuthorityInfoAccess certificate extensions and will not attempt the OCSP check. On a queue manager it is necessary to issue a REFRESH SECURITY TYPE(SSL) MQSC command (or the equivalent MQCMD_REFRESH_SECURITY PCF command) before the new setting will take effect. On a client it is necessary for the client application either to restart or to close all of its SSL connections before the new setting will take effect. The WebSphere MQ documentation will be updated to describe the new setting. In particular, topic cs13400 will be updated. Also topics sy13000 and e_auth_info_ocsp will specify that AuthorityInfoAccess extensions are not checked if OCSPCheckExtensions=no in the SSL stanza. Users who have set the OCSPCheckExtensions setting must remove the setting before removing the APAR fix. Also, users who revert to WebSphere MQ fixpack 22.214.171.124 or earlier must remove the OCSPCheckExtensions setting before removing the fixpack. | MDVREGR 7.0-WS-MQ-Windows-RP0001 | | MDVREGR 7.0-WS-MQ-SolarisX64-RP0001 | | MDVREGR 7.0-WS-MQ-SolarisSparc64-RP0001 | | MDVREGR 7.0-WS-MQ-LinuxX64-RP0001 | | MDVREGR 7.0-WS-MQ-LinuxS390X-RP0001 | | MDVREGR 7.0-WS-MQ-LinuxPPC64-RP0001 | | MDVREGR 7.0-WS-MQ-LinuxIA32-RP0001 | | MDVREGR 7.0-WS-MQ-HpuxPaRISC64-RP0001 | | MDVREGR 7.0-WS-MQ-HpuxIA64-RP0001 | | MDVREGR 7.0-WS-MQ-AixPPC64-RP0001 | --------------------------------------------------------------- The fix is targeted for delivery in the following PTFs: v7.0 Platform Fix Pack 126.96.36.199 -------- -------------------- Windows U200310 AIX U827232 HP-UX (PA-RISC) U826485 HP-UX (Itanium) U826884 Solaris (SPARC) U827125 Solaris (x86-64) U827374 iSeries tbc_p700_0_1_1 Linux (x86) U826321 Linux (x86-64) U827231 Linux (zSeries) U827105 Linux (Power) U826779 The latest available maintenance can be obtained from 'WebSphere MQ Recommended Fixes' http://www-1.ibm.com/support/docview.wss?rs=171&uid=swg27006037 If the maintenance level is not yet available, information on its planned availability can be found in 'WebSphere MQ Planned Maintenance Release Dates' http://www-1.ibm.com/support/docview.wss?rs=171&uid=swg27006309 ---------------------------------------------------------------
Reported component name
WMQ SOL SPARC
Reported component ID
Last modified date
APAR is sysrouted FROM one or more of the following:
APAR is sysrouted TO one or more of the following:
Fixed component name
WMQ SOL SPARC
Fixed component ID
Applicable component levels
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