PHP :: Bug #76476 :: Segmentation fault in zim_SoapServer

Bug #76476

Segmentation fault in zim_SoapServer_handle

Submitted:

2018-06-14 11:03 UTC

Modified:

2021-04-04 04:22 UTC

Votes:	1
Avg. Score:	5.0 ± 0.0
Reproduced:	1 of 1 (100.0%)
Same Version:	1 (100.0%)
Same OS:	1 (100.0%)

From:

dnt at gmx dot com

Assigned:

cmb (profile)

Status:

No Feedback

Package:

SOAP related

PHP Version:

7.2.6

OS:

Arch Linux

Private report:

CVE-ID:

None

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[2018-06-14 11:03 UTC] dnt at gmx dot com

Description:
------------
I get a segmentation fault in zim_SoapServer_handle under PHP 7.2.6. The script runs with PHP 5.3 to 5.6. This is the result of running the script with USE_ZEND_ALLOC=0 valgrind --tool=memcheck --leak-check=no --track-origins=yes --num-callers=30 --show-reachable=no:

==25782== Conditional jump or move depends on uninitialised value(s)
==25782==    at 0x403F647: ???
==25782==    by 0xF169A77: ???
==25782==    by 0xF169A77: ???
==25782==    by 0xF169A80: ???
==25782==    by 0x1FFEFFB54F: ???
==25782==  Uninitialised value was created by a heap allocation
==25782==    at 0x4C2CEDF: malloc (vg_replace_malloc.c:299)
==25782==    by 0x6EDE9F: __zend_malloc (zend_alloc.c:2829)
==25782==    by 0x6ED16A: _emalloc (zend_alloc.c:2429)
==25782==    by 0x5C8939: zend_string_alloc (zend_string.h:134)
==25782==    by 0x5C8A75: zend_string_init (zend_string.h:170)
==25782==    by 0x5CA9DC: zif_parse_url (url.c:399)
==25782==    by 0x78E3E0: ZEND_DO_FCALL_BY_NAME_SPEC_RETVAL_USED_HANDLER (zend_vm_execute.h:816)
==25782==    by 0x814CBB: execute_ex (zend_vm_execute.h:59746)
==25782==    by 0x70E380: zend_call_function (zend_execute_API.c:819)
==25782==    by 0x4733A8: reflection_method_invoke (php_reflection.c:3221)
==25782==    by 0x47357C: zim_reflection_method_invokeArgs (php_reflection.c:3257)
==25782==    by 0x78EF0D: ZEND_DO_FCALL_SPEC_RETVAL_USED_HANDLER (zend_vm_execute.h:1032)
==25782==    by 0x814CD5: execute_ex (zend_vm_execute.h:59752)
==25782==    by 0x81A08A: zend_execute (zend_vm_execute.h:63760)
==25782==    by 0x728B7C: zend_execute_scripts (zend.c:1496)
==25782==    by 0x68BCC6: php_execute_script (main.c:2590)
==25782==    by 0x81CCC9: do_cli (php_cli.c:1011)
==25782==    by 0x81DEE1: main (php_cli.c:1404)
==25782== 
==25782== Invalid read of size 8
==25782==    at 0x49E3C3: zim_SoapServer_handle (soap.c:1804)
==25782==    by 0x78E8C9: ZEND_DO_FCALL_SPEC_RETVAL_UNUSED_HANDLER (zend_vm_execute.h:907)
==25782==    by 0x814CC8: execute_ex (zend_vm_execute.h:59749)
==25782==    by 0x70E380: zend_call_function (zend_execute_API.c:819)
==25782==    by 0x4733A8: reflection_method_invoke (php_reflection.c:3221)
==25782==    by 0x47357C: zim_reflection_method_invokeArgs (php_reflection.c:3257)
==25782==    by 0x78EF0D: ZEND_DO_FCALL_SPEC_RETVAL_USED_HANDLER (zend_vm_execute.h:1032)
==25782==    by 0x814CD5: execute_ex (zend_vm_execute.h:59752)
==25782==    by 0x81A08A: zend_execute (zend_vm_execute.h:63760)
==25782==    by 0x728B7C: zend_execute_scripts (zend.c:1496)
==25782==    by 0x68BCC6: php_execute_script (main.c:2590)
==25782==    by 0x81CCC9: do_cli (php_cli.c:1011)
==25782==    by 0x81DEE1: main (php_cli.c:1404)
==25782==  Address 0x10 is not stack'd, malloc'd or (recently) free'd
==25782== 
==25782== 
==25782== Process terminating with default action of signal 11 (SIGSEGV): dumping core
==25782==  Access not within mapped region at address 0x10
==25782==    at 0x49E3C3: zim_SoapServer_handle (soap.c:1804)
==25782==    by 0x78E8C9: ZEND_DO_FCALL_SPEC_RETVAL_UNUSED_HANDLER (zend_vm_execute.h:907)
==25782==    by 0x814CC8: execute_ex (zend_vm_execute.h:59749)
==25782==    by 0x70E380: zend_call_function (zend_execute_API.c:819)
==25782==    by 0x4733A8: reflection_method_invoke (php_reflection.c:3221)
==25782==    by 0x47357C: zim_reflection_method_invokeArgs (php_reflection.c:3257)
==25782==    by 0x78EF0D: ZEND_DO_FCALL_SPEC_RETVAL_USED_HANDLER (zend_vm_execute.h:1032)
==25782==    by 0x814CD5: execute_ex (zend_vm_execute.h:59752)
==25782==    by 0x81A08A: zend_execute (zend_vm_execute.h:63760)
==25782==    by 0x728B7C: zend_execute_scripts (zend.c:1496)
==25782==    by 0x68BCC6: php_execute_script (main.c:2590)
==25782==    by 0x81CCC9: do_cli (php_cli.c:1011)
==25782==    by 0x81DEE1: main (php_cli.c:1404)
==25782==  If you believe this happened as a result of a stack
==25782==  overflow in your program's main thread (unlikely but
==25782==  possible), you can try to increase the size of the
==25782==  main thread stack using the --main-stacksize= flag.
==25782==  The main thread stack size used in this run was 8388608.
==25782== 
==25782== HEAP SUMMARY:
==25782==     in use at exit: 21,865,125 bytes in 130,847 blocks
==25782==   total heap usage: 412,679 allocs, 281,832 frees, 111,220,670 bytes allocated
==25782== 
==25782== For a detailed leak analysis, rerun with: --leak-check=full
==25782== 
==25782== For counts of detected and suppressed errors, rerun with: -v
==25782== ERROR SUMMARY: 5 errors from 2 contexts (suppressed: 0 from 0)

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[2018-06-18 15:27 UTC] dnt at gmx dot gom

The problem arises when SoapServer::addSoapHeader() is called when handling the received SOAP header. Some sample service:

class MySoapService
{
    private $server;

    public function __construct(\SoapServer $server)
    {
        $this->server = $server;
        $server->setObject($this);
    }

    public function MyHeader($header)
    {
        $this->server->addSoapHeader(new \SoapHeader("ns", "MyHeader"));
    }
    
    public function MyRequest($request)
    {
        // this method is not reached
    }
}

[2021-03-23 14:29 UTC] cmb@php.net

-Status: Open +Status: Feedback -Assigned To: +Assigned To: cmb

[2021-03-23 14:29 UTC] cmb@php.net

This might not be particularly related to SOAP, but more of
general memory mismanagement issue.  Anyhow, does this still
happen to you with any of the actively supported PHP versions[1]?

[1] <https://www.php.net/supported-versions.php>

[2021-04-04 04:22 UTC] php-bugs at lists dot php dot net

No feedback was provided. The bug is being suspended because
we assume that you are no longer experiencing the problem.
If this is not the case and you are able to provide the
information that was requested earlier, please do so and
change the status of the bug back to "Re-Opened". Thank you.

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