PM53340: INCORRECT REQUEST BODY HANDLING WITH EXPECT: 100-CONTINUE

Fixes are available

APAR status

Closed as program error.

Error description

Incorrect request body handling with Expect: 100-continue if the
client does not receive a transmitted 300 or 400 response prior
to sending its body.
When responding to a HTTP request that has the following
headers:
Expect: 100-continue
Transfer-Encoding: chunked
....if the response is anything other than simply "100 Continue"
(e.g. if the response is 302 redirect or 401 authorization
required), the server interprets any body elements in the
request as being part of a new request instead of discarding the
chunks.

Local fix

Problem summary

****************************************************************
* USERS AFFECTED:  IBM HTTP Server users with HTTP clients     *
*                  that send POST requests with                *
*                  Expect: 100-Continue                        *
****************************************************************
* PROBLEM DESCRIPTION: After IHS processes a POST request      *
*                      which got a 401 or 302 or some other    *
*                      non-200 response, the IHS error log     *
*                      contains an "Invalid URI in request"    *
*                      or "Invalid method in request"          *
*                      message followed by the POST request    *
*                      body, sometimes xml.  The same          *
*                      request body appears in the access      *
*                      log.                                    *
****************************************************************
* RECOMMENDATION:                                              *
****************************************************************
IHS sends a response other than 100 Continue to a POST
request that contained an Expect: 100-Continue header.  Then
IHS receives the body for the POST due to a client error
or timeout and tries to process the body as the next HTTP
request.

Problem conclusion

When IHS sends a response other than 100 Continue to a POST
request with an Expect: 100-Continue header, it will now close
the connection.

See Apache bugzilla PR 47087
https://issues.apache.org/bugzilla/show_bug.cgi?id=47087

This fix is targeted for IBM HTTP Server fix packs:
 - 7.0.0.23
 - 8.0.0.3

Temporary fix

Comments

APAR Information

APAR number
PM53340
Reported component name
WAS IHS ZOS
Reported component ID
5655I3510
Reported release
700
Status
CLOSED PER
PE
NoPE
HIPER
NoHIPER
Special Attention
NoSpecatt / Xsystem
Submitted date
2011-12-01
Closed date
2011-12-14
Last modified date
2012-08-09

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
WAS IHS ZOS
Fixed component ID
5655I3510

Applicable component levels

R700 PSY
UP
R800 PSY
UP

[{"Business Unit":{"code":"BU059","label":"IBM Software w\/o TPS"},"Product":{"code":"SS7K4U","label":"WebSphere Application Server for z\/OS"},"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"7.0","Line of Business":{"code":"LOB45","label":"Automation"}}]

Document Information

Modified date:
28 October 2021

Tips

PM53340: INCORRECT REQUEST BODY HANDLING WITH EXPECT: 100-CONTINUE

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

Document Information

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