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UNIRAS Brief - 474/05 - AusCERT - Veritas Backup Exec multiple vulnerabilities (AL-2005.013)



 
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   UNIRAS (UK Govt CERT) Briefing Notice - 474/05 dated 23.06.05  Time: 15:40  
  UNIRAS is part of NISCC (National Infrastructure Security Co-ordination Centre)
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  UNIRAS material is also available from its website at www.uniras.gov.uk and
         Information about NISCC is available from www.niscc.gov.uk
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Title
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AusCERT - Veritas Backup Exec multiple vulnerabilities  (AL-2005.013)


Detail
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===========================================================================
A  U  S  C  E  R  T                                           A  L  E  R  T

                       AL-2005.013 -- AUSCERT ALERT
              Veritas Backup Exec - multiple vulnerabilities
                               23 June 2005

===========================================================================

        AusCERT Alert Summary
        ---------------------

Product:           Veritas Backup Exec 10.0 rev 5484 and prior (Windows)
                   Veritas Backup Exec 10.0 rev 5520 and prior (NetWare)
Operating System:  Windows
                   Novell NetWare
Impact:            Administrator Compromise
                   Denial of Service
Access:            Remote/Unauthenticated
                   Existing Account
CVE Names:         CAN-2005-0771 CAN-2005-0772 CAN-2005-0773


OVERVIEW:

	This bulletin describes six vulnerabilities in Veritas Backup Exec.

	1. Remote registry access vulnerability CAN-2005-0771
	   An access validation vulnerability in Backup Exec for Windows allows
	   remote attackers to access the Windows registry on the backup server
	   with Administrator privileges.

	2. Remote Agent for Windows buffer overflow CAN-2005-0773
	   The Backup Exec Remote Agent for Windows Servers contains a buffer
	   overflow vulnerability due to incorrect validation on 
	   authentication requests, allowing a remote attacker to execute 
	   arbitrary code.

	3. Admin Plus Pack remote heap overflow
	   Backup Exec for Windows using the Admin Plus Pack option has a
	   heap overflow vulnerability that may be exploited by an 
	   unauthenticated remote attacker who can connect to the TCP port 
	   on which the Backup Exec service is listening.

	4. Process handle privilege elevation
	   Non-privileged local users on systems where the Backup Exec Remote 
	   Agent for Windows is installed can copy the handle used by the Agent,
	   and thereby execute arbitrary code with Local System privileges.

	5. Web Administration Console buffer overflow
	   The Web Administration Console, which may be installed on the Backup 
	   Exec media server, has a buffer overflow vulnerability when parsing
	   user-provided credentials.

	6. Remote Agent denial of service CAN-2005-0772
	   Two buffer overflows in the Remote Agent for Windows or NetWare 
	   Servers allow unauthenticated remote attackers to cause a denial
	   of service on computers where the Agent is installed. 
	   These vulnerabilities reportedly can not be exploited to execute 
	   arbitrary code. 


IMPACT:

	1. A remote attacker can gain Administrator access to the registry 
	   and then use this to gain complete administrative control of the 
	   backup server.

	2. A remote attacker can execute arbitrary code on the computers 
	   where the Remote Agent is installed, and gain administrative 
	   control of these computers.

	3. An unauthenticated remote attacker can execute arbitrary code on
	   the backup server and gain administrative control of the computer.

	4. Local users on computers where the Backup Exec Remote Agent is 
	   installed can gain Local System privileges.

	5. A user of the Web Administration Console can execute arbitrary code
	   on the Backup Exec media server and gain administrative control of
	   the computer.

	6. Unauthenticated attackers can remotely crash the computers which
	   have Backup Exec Remote Agent installed.


MITIGATION:

	Veritas has released patches fixing all six vulnerabilities. These
	can be downloaded via the following patch summary web page:
	http://seer.support.veritas.com/docs/277429.htm


REFERENCES:

	[1] VERITAS Software Security Advisory VX05-003
	    http://seer.support.veritas.com/docs/276605.htm

	[2] VERITAS Software Security Advisory VX05-002
	    http://seer.support.veritas.com/docs/276604.htm

	[3] VERITAS Software Security Advisory VX05-006
	    http://seer.support.veritas.com/docs/276607.htm

	[4] VERITAS Software Security Advisory VX05-007
	    http://seer.support.veritas.com/docs/276608.htm

	[5] VERITAS Software Security Advisory VX05-005
	    http://seer.support.veritas.com/docs/276606.htm

	[6] VERITAS Software Security Advisory VX05-001
	    http://seer.support.veritas.com/docs/276533.htm


AusCERT has made every effort to ensure that the information contained
in this document is accurate.  However, the decision to use the information
described is the responsibility of each user or organisation. The decision to
follow or act on information or advice contained in this security bulletin is
the responsibility of each user or organisation, and should be considered in
accordance with your organisation's site policies and procedures. AusCERT
takes no responsibility for consequences which may arise from following or
acting on information or advice contained in this security bulletin.

If you believe that your computer system has been compromised or attacked in 
any way, we encourage you to let us know by completing the secure National IT 
Incident Reporting Form at:

        http://www.auscert.org.au/render.html?it=3192

===========================================================================
Australian Computer Emergency Response Team
The University of Queensland
Brisbane
Qld 4072

Internet Email: auscert@xxxxxxxxxxxxxx
Facsimile:      (07) 3365 7031
Telephone:      (07) 3365 4417 (International: +61 7 3365 4417)
                AusCERT personnel answer during Queensland business hours
                which are GMT+10:00 (AEST).
                On call after hours for member emergencies only.
===========================================================================

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For additional information or assistance, please contact the HELP Desk by 
telephone or Not Protectively Marked information may be sent via 
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On Call Duty Officer:
Tel: +44 (0) 870 487 0748 and follow the prompts

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UNIRAS wishes to acknowledge the contributions of AusCERT for the information 
contained in this Briefing. 
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This Briefing contains the information released by the original author. Some 
of the information may have changed since it was released. If the vulnerability 
affects you, it may be prudent to retrieve the advisory from the canonical site 
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Reference to any specific commercial product, process, or service by trade 
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Neither UNIRAS or NISCC shall also accept responsibility for any errors 
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UNIRAS is a member of the Forum of Incident Response and Security Teams (FIRST) 
and has contacts with other international Incident Response Teams (IRTs) in 
order to foster cooperation and coordination in incident prevention, to prompt 
rapid reaction to incidents, and to promote information sharing amongst its 
members and the community at large. 
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<End of UNIRAS Briefing>

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