PI48725: INITIAL TLSV1.0 APPLICATION DATA PACKET READ INTO THE WRONG BUFFER BY SSL CHANNEL

Fixes are available

APAR status

Closed as program error.

Error description

In rare cases, when WebSphere Application Server receives
application response data prior to the application sending out
its request, the response data will be read into the same
buffer as the change cipher spec packet, which causes it to
never make it to the JSSE layer. If a CBC-mode cipher suite is
in use, this will cause decryption to fail with a "Bad record
MAC" error reported by JSSE.

Local fix

use a stream cipher or ensure that all application response
data arrives after the application request is sent

Problem summary

****************************************************************
* USERS AFFECTED:  IBM WebSphere Application Server Version    *
*                  7.0, 8.0, 8.5 and 8.5.5 Full Profile and    *
*                  Liberty Profile 8.5.5 users of the SSL      *
*                  Channel                                     *
****************************************************************
* PROBLEM DESCRIPTION: Request fails due to response data      *
*                      being lost on an SSL outbound           *
*                      connection.                             *
****************************************************************
* RECOMMENDATION:                                              *
****************************************************************
During an outbound connection, the SSL Channel could read the
end of the handshake and the beginning of the request data. In
this case, the SSL Channel would disregard the already read
request data. This could cause an exception while decrypting
the request data. An example of the exception which can occur
is:
[9/17/15 14:06:17:238 CDT] 000012b7 SystemOut     O
WebContainer : 1, fatal error: 20: bad record MAC
javax.crypto.BadPaddingException: bad record MAC

Problem conclusion

The SSL Channel was modified to correctly decrypt all
application data.

The fix for this APAR is currently targeted for inclusion in
fix pack 7.0.0.41, 8.0.0.12, and 8.5.5.9.  Please refer to the
Recommended Updates page for delivery information:
http://www.ibm.com/support/docview.wss?rs=180&uid=swg27004980

Temporary fix

Comments

APAR Information

APAR number
PI48725
Reported component name
WEBS APP SERV N
Reported component ID
5724H8800
Reported release
850
Status
CLOSED PER
PE
NoPE
HIPER
NoHIPER
Special Attention
NoSpecatt / Xsystem
Submitted date
2015-09-14
Closed date
2015-11-13
Last modified date
2016-02-15

APAR is sysrouted FROM one or more of the following:
APAR is sysrouted TO one or more of the following:

Fix information

Fixed component name
WEBS APP SERV N
Fixed component ID
5724H8800

Applicable component levels

R700 PSY
UP
R800 PSY
UP
R850 PSY
UP

[{"Business Unit":{"code":"BU059","label":"IBM Software w\/o TPS"},"Product":{"code":"SSEQTP","label":"WebSphere Application Server"},"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"8.5","Line of Business":{"code":"LOB45","label":"Automation"}}]

Document Information

Modified date:
28 April 2022

Tips

PI48725: INITIAL TLSV1.0 APPLICATION DATA PACKET READ INTO THE WRONG BUFFER BY SSL CHANNEL

Fixes are available

Subscribe

APAR status

Closed as program error.

Error description

Local fix

Problem summary

Problem conclusion

Temporary fix

Comments

APAR Information

APAR number

Reported component name

Reported component ID

Reported release

Status

PE

HIPER

Special Attention

Submitted date

Closed date

Last modified date

APAR is sysrouted FROM one or more of the following:

APAR is sysrouted TO one or more of the following:

Fix information

Fixed component name

Fixed component ID

Applicable component levels

R700 PSY

R800 PSY

R850 PSY

Document Information

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