June 2005

ID: 00514
Ref: 474/2005
Date: 23 June 2005:16:04:19
Version: 1

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Title: AusCERT - Veritas Backup Exec multiple vulnerabilities (AL-2005.013)
Abstract: This bulletin describes six vulnerabilities in Veritas Backup Exec
Vendors affected: Veritas
Applications affected: Veritas

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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

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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

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

Internet Email: auscert@auscert.org.au
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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