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Arpine Maghakyan

Arpine Maghakyan

Security Researcher of RedRays.

Security settings in the message server, SAP security note 821875

Description

You want to increase the security setting of the message server. To do this, you can make the following settings:

    1. set whether external monitors such as the “msmon” monitoring program are allowed to connect to the message server;
    2. set the separation of the internal and external communication
    3. set the use of an ACL list (Access Control List) for the message server

In the Solution, you can see the details for the points listed above

A further symptom is that no events can be triggered via sapevt. The following trace entries appear in the trace of the message server:

[Thr 3936] *** ERROR => MsSClientHandle: client 212.190.195.45 (212.190.
              0.195.45) is EXTERNAL, access denied [msxxserv.c   4843]

Available fix and Supported packages

  • SAP_BASIS | 640 | 640
  • SAP_BASIS | 700 | 701
  • SAP_BASIS | 710 | 720
  • SAP_BASIS 700 | SAPKB70001 |
  • SAP KERNEL 6.40 32-BIT | SP320 | 000320
  • SAP KERNEL 6.40 32-BIT | SP321 | 000321
  • SAP KERNEL 6.40 32-BIT UNICODE | SP320 | 000320
  • SAP KERNEL 6.40 32-BIT UNICODE | SP321 | 000321
  • SAP KERNEL 6.40 64-BIT | SP320 | 000320
  • SAP KERNEL 6.40 64-BIT | SP321 | 000321
  • SAP KERNEL 6.40 64-BIT UNICODE | SP320 | 000320
  • SAP KERNEL 6.40 64-BIT UNICODE | SP321 | 000321
  • SAP KERNEL 6.40_EX2 32-BIT | SP320 | 000320
  • SAP KERNEL 6.40_EX2 32-BIT | SP321 | 000321
  • SAP KERNEL 6.40_EX2 32-BIT UC | SP320 | 000320
  • SAP KERNEL 6.40_EX2 32-BIT UC | SP321 | 000321
  • SAP KERNEL 6.40_EX2 64-BIT | SP320 | 000320
  • SAP KERNEL 6.40_EX2 64-BIT | SP321 | 000321
  • SAP KERNEL 6.40_EX2 64-BIT UC | SP320 | 000320
  • SAP KERNEL 6.40_EX2 64-BIT UC | SP321 | 000321
  • SAP KERNEL 7.00 32-BIT | SP244 | 000244
  • SAP KERNEL 7.00 32-BIT | SP246 | 000246
  • SAP KERNEL 7.00 32-BIT UNICODE | SP244 | 000244
  • SAP KERNEL 7.00 32-BIT UNICODE | SP246 | 000246

Affected component

    BC-CST-MS
    Message Service

CVSS

Score: 0

Exploit

Exploit is not available.
For detailed information please contact the mail [email protected]

URL

https://launchpad.support.sap.com/#/notes/821875

TAGS

#SecurityMessage-serversapevtMsSLoginClientMSEACCESSDENIEDMsSClientHandleAccess-denied.

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