helpThe oSIP library - Support: sr #109265, SIP message body length underflow...


sr #109265: SIP message body length underflow in libosip2-4.1.0

Submitted by:  Bhargava Shastry <bshastry>
Submitted on:  Mon 20 Feb 2017 01:15:03 PM UTC  
Category:  None Priority:  5 - Normal
Severity:  4 - Important Status:  Done
Privacy:  Public Assigned to:  Aymeric MOIZARD <aymeric>
Open/Closed:  Closed Operating System:  GNU/Linux

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Tue 21 Feb 2017 04:24:30 PM UTC, comment #1: 

Tks for your report.

Unfortunatly, the bug also show up in the newer version (5.0.0).

The older torture_test was skipping some data if NUL char appears in the SIP message test.

I have fixed the issue in the git:


Aymeric MOIZARD <aymeric>
Project AdministratorIn charge of this item.
Mon 20 Feb 2017 01:15:03 PM UTC, original submission:  


I would like to report a heap overwrite due to an underflow in SIP body message length variable. I have attached the input (`SIP_body_len_underflow.txt`) that triggers the issue in libosip2-4.1.0. Please note that this has been fixed in the latest release but I am filing this issue so it is made public in case older versions are still around (which is quite likely).

I have also attached the patch (`SIP_body_len_underflow.patch`) with this report. Please note that the issue may be reproduced by

$ torture_test <filename> 0 -c

Looking forward to your acknowledgement of the issue.


Bhargava Shastry <bshastry>


(Note: upload size limit is set to 16384 kB, after insertion of the required escape characters.)

Attach Files:

Attached Files
file #39798:  SIP_body_len_underflow.txt added by bshastry (472B - text/plain - Files for reproducing/fixing said issue)
file #39799:  SIP_body_len_underflow.patch added by bshastry (1KiB - text/x-patch - Files for reproducing/fixing said issue)


Depends on the following items: None found

Items that depend on this one: None found


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    Follow 5 latest changes.

    Date Changed by Updated Field Previous Value => Replaced by
    2017-02-21 aymeric StatusNone => Done
        Assigned toNone => aymeric
        Open/ClosedOpen => Closed
    2017-02-20 bshastry Attached File- => Added SIP_body_len_underflow.txt, #39798
        Attached File- => Added SIP_body_len_underflow.patch, #39799

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