Microsoft Security Bulletin MS02-006 (version 2.0)

Discussion in 'other security issues & news' started by Zhen-Xjell, Feb 15, 2002.

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  1. Zhen-Xjell

    Zhen-Xjell Security Expert

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    Title:      Unchecked Buffer in SNMP Service Could Enable Arbitrary
               Code to be Run
    Released:   12 February 2002
    Revised:    15 February 2002 (Version 2.0)
    Software:   Microsoft Windows 95, 98, 98SE, NT 4.0, NT 4.0 Terminal
               Server Edition, 2000, XP
    Impact:     Denial of Service, potentially run code of
               attacker's choice
    Max Risk:   Moderate
    Bulletin:   MS02-006

    Microsoft encourages customers to review the Security Bulletin at:
    http://www.microsoft.com/technet/security/bulletin/MS02-006.asp.
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    Reason for Revision:
    ====================
    On February 12 2002, Microsoft released the original version of this
    bulletin. In it, we detailed a work-around procedure that customers
    could implement to protect themselves against a publicly disclosed
    vulnerability. An updated version of this bulletin was released on
    February 15, 2002, to announce the availability of the patch for
    Windows 2000 and Windows XP and to advise customers that the
    work-around procedure is no longer needed on those platforms. Patches
    for additional platforms are forthcoming and this bulletin will
    be re-released to annouce their availability.

    Issue:
    ======

    Simple Network Management Protocol (SNMP) is an Internet standard
    protocol for managing disparate network devices such as firewalls,
    computers, and routers. All versions of Windows except Windows ME
    provide an SNMP implementation, which is neither installed nor
    running by default in any version.

    A buffer overrun is present in all implementations. By sending a
    specially malformed management request to a system running an
    affected version of the SNMP service, an attacker could cause a
    denial of service. In addition, it is possible that he cause code
    to run on the system in LocalSystem context. This could
    potentially give the attacker the ability to take any desired
    action on the system.

    A patch is under development to eliminate the vulnerability.
    In the meantime, Microsoft recommends that customers who use the
    SNMP service disable it temporarily. Patches will be available
    shortly, at which time we will re-release this bulletin with
    updated details.

    Mitigating Factors:
    ====================
    - The SNMP service is neither installed nor running by default
      in any version of Windows.

    - Standard firewalling practices recommend blocking the port
      over which SNMP operates (UDP ports 161 and 162). If these
      recommendations have been followed, the vulnerability could
      only be exploited by an intranet user.

    - Standard security recommendations recommend against using SNMP
      except on trusted networks, as the protocol, by design,
      provides minimal security.

    Risk Rating:
    ============
    - Internet systems: Low
    - Intranet systems: Moderate
    - Client systems: Moderate

    Patch Availability:
    ===================
    - A patch is available to fix this vulnerability for WIndows 2000
      and Windows XP. Please read the Security Bulletin at
      http://www.microsoft.com/technet/security/bulletin/ms02-006.asp
      for information on obtaining this patch.

    - Patches for other platforms are under development and will be
      available shortly. When this happens, we will re-release this
      bulletin with information on how to obtain and install these
      patches.


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