PM32132: SIP DOES NOT PARSE THE VIA BRANCH CORRECTLY.

Fixes are available

APAR status

Closed as program error.

Error description

Session Initiation Protocol (SIP) does not parse the Via branch
correctly.

The SIP container is removing all characters in SIP Via header's
branch field that are present after an ' (apostrophe). This
causes the SIP container to believe the subsequent new INVITE
that comes in with unique Call-IDs are retransmissions for
previous INVITEs (because when SIP container strips off the
characters after the apostrophe the branch ID values match) .
SIP container just retransmits its original response and it
breaks the call.

WebSphere Application Server V7.0.
Distributed operating systems.

Local fix

Problem summary

****************************************************************
* USERS AFFECTED:  SIP (Session Initiation Protocol) users     *
*                  of IBM WebSphere Application Server V7.0    *
****************************************************************
* PROBLEM DESCRIPTION: The parser does not consume the         *
*                      apostrophe (') character when           *
*                      processing header parameters.           *
****************************************************************
* RECOMMENDATION:                                              *
****************************************************************
The problem is in the SIP parser, when processing a header
parameter value. The parser does not recognize the apostrophe
(ASCII code 39) or the grave accent (ASCII code 96) as valid
characters in the token. This results in a broken parameter.

Problem conclusion

The bug is fixed in the SIP parser. With this fix, header
parameters are parsed correctly, including the apostrophe and
grave accent characters.

The fix for this APAR is currently targeted for inclusion in
fix pack 7.0.0.19.  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
PM32132
Reported component name
WEBS APP SERV N
Reported component ID
5724H8800
Reported release
700
Status
CLOSED PER
PE
NoPE
HIPER
NoHIPER
Special Attention
NoSpecatt
Submitted date
2011-02-08
Closed date
2011-03-14
Last modified date
2011-03-14

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

PM33919

Fix information

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

Applicable component levels

R700 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":"7.0","Line of Business":{"code":"LOB45","label":"Automation"}}]

Document Information

Modified date:
27 October 2021

Tips

PM32132: SIP DOES NOT PARSE THE VIA BRANCH CORRECTLY.

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

Document Information

Share your feedback

Need support?