[NT] Multiple Vendor Progress Server Heap Overflow Vulnerability

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Multiple Vendor Progress Server Heap Overflow Vulnerability
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SUMMARY

A vulnerability allows attackers to execute arbitrary code on vulnerable
installations of RSA Authentication Manager and other products that
include the Progress server. User interaction is not required to exploit
this vulnerability.

DETAILS

The specific flaw exists in the Progress Server listening by default on
TCP ports 5520 and 5530. The _mprosrv.exe process trusts a user-supplied
DWORD size and attempts to receive that amount of data into a statically
allocated heap buffer.

The user-supplied size parameter is used directly as an argument to recv()
as shown below:

_mprosrv.exe:
0044F24F mov eax, [esp+42Ch+buf] ; 1012 byte heap buffer
0044F253 push 0 ; flags
0044F255 push esi ; attacker-controlled size
0044F256 push eax ; 1012 byte heap buffer
0044F257 push edi ; s
0044F258 call recv

The heap buffer which is received into is 1012 bytes. Sending more than
1012 bytes will overflow into subsequent heap chunks. This heap corruption
can be leveraged by an attacker to execute arbitrary code in the context
of the SYSTEM user.

Vendor Response:
Progress Software states: Progress Software has released an update for
this issue through our partners. EMC/RSA information is listed below.
Other vendors may be affected. For additional information, please contact
Progress Technical Support and reference Support ID: P123949.

RSA Security states: RSA has made hot fixes available to registered users
through RSA Customer Support. For more information, please visit the RSA
website for the appropriate product:

For RSA ACE/Server 5.2, apply the following hot fix on top of Patch 1:

<https://knowledge.rsasecurity.com/dlcpages/rsa_securid/securid_dlc_as52p.asp> https://knowledge.rsasecurity.com/dlcpages/rsa_securid/securid_dlc_as52p.asp

For RSA Authentication Manager 6.0, apply the following hot fix on top of
the Patch 2 - (scroll down to the second half of the page)

<https://knowledge.rsasecurity.com/dlcpages/rsa_securid/securid_dlc_am60p2.asp> https://knowledge.rsasecurity.com/dlcpages/rsa_securid/securid_dlc_am60p2.asp

For RSA SecurID Appliance 2.0, apply the following hot fix on top of the
Upgrade 2.0.1:

<https://knowledge.rsasecurity.com/dlcpages/rsa_securid/securid_dlc_app.asp> https://knowledge.rsasecurity.com/dlcpages/rsa_securid/securid_dlc_app.asp

For RSA Authentication Manager 6.1, apply the 6.1.2 patch:

<https://knowledge.rsasecurity.com/dlcpages/rsa_securid/securid_dlc_am60p2.asp> https://knowledge.rsasecurity.com/dlcpages/rsa_securid/securid_dlc_am60p2.asp

RSA recommends that all customers using RSA ACE/Server 5.2, RSA
Authentication Manager 6.0 and 6.1, and RSA SecurID Appliance 2.0 install
the hot fixes. Notification was recently (June 28, 2007) sent to RSA
SecurCare customers about the vulnerability and the correct way to resolve
it.

Disclosure Timeline:
2007-03-14 - Vulnerability reported to vendor
2007-05-22 - Digital Vaccine released to TippingPoint customers
2007-07-12 - Coordinated public release of advisory

ADDITIONAL INFORMATION

The information has been provided by Aaron Portnoy, TippingPoint DVLabs.
The original article can be found at:
<http://dvlabs.tippingpoint.com/advisory/TPTI-07-12>

http://dvlabs.tippingpoint.com/advisory/TPTI-07-12

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