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UNIRAS Brief - 591/03 - Secunia Advisory



 
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   UNIRAS (UK Govt CERT) Briefing Notice - 591/03 dated 30.10.03  Time: 10:10
 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
=====
Mac OS X Screen Lock Bypass Vulnerability.

Detail
======
A vulnerability has been reported in Mac OS X, which can be exploited
by malicious users to perform actions while Screen Lock is enabled.

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SECUNIA ADVISORY ID:
SA10089

VERIFY ADVISORY:
http://www.secunia.com/advisories/10089/

CRITICAL:
Less critical

IMPACT:
Security Bypass

WHERE:
Local system

OPERATING SYSTEM:
Apple Macintosh OS X

DESCRIPTION:
A vulnerability has been reported in Mac OS X, which can be exploited
by malicious users to perform actions while Screen Lock is enabled.

When the Screen Lock is enabled, it is still possible to perform
actions in a limited period of time until the authentication window
is displayed. This can potentially be exploited to manipulate the
user environment (eg. start applications, close open applications,
perform shortcut operations etc.).

The vulnerability has been reported in version 10.3 Build 7B85. Other
versions may also be affected.

SOLUTION:
Log out when leaving systems or make sure that only trusted people
can access them.

REPORTED BY / CREDITS:
CodeSamurai

ORIGINAL ADVISORY:
Mac OS X 10.3 Panther Screen Lock Bypass:
http://www.securemac.com/macosx-screenlock-bypass.php

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Secunia recommends that you verify all advisories you receive, by
clicking the link.
Secunia NEVER sends attached files with advisories.
Secunia does not advise people to install third party patches, only
use those supplied by the vendor.

Contact details:
Web	: http://www.secunia.com/
E-mail	: support@xxxxxxxxxxx
Tel	: +45 7020 5144
Fax	: +45 7020 5145

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Unsubscribe: Secunia Security Advisories
http://www.secunia.com/sec_adv_unsubscribe/?email=uniras@xxxxxxxxxxxx

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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 EMail to:
uniras@xxxxxxxxxxxx

Office Hours:
Mon - Fri: 08:30 - 17:00 Hrs
Tel: +44 (0) 20 7821 1330 Ext 4511
Fax: +44 (0) 20 7821 1686

Outside of Office Hours:
On Call Duty Officer:
Tel: +44 (0) 20 7821 1330 and follow the prompts

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UNIRAS wishes to acknowledge the contributions of Secunia 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 
to ensure that you receive the most current information concerning that problem.

Reference to any specific commercial product, process, or service by trade 
name, trademark manufacturer, or otherwise, does not constitute or imply 
its endorsement, recommendation, or favouring by UNIRAS or NISCC.  The views 
and opinions of authors expressed within this notice shall not be used for 
advertising or product endorsement purposes.

Neither UNIRAS or NISCC shall also accept responsibility for any errors 
or omissions contained within this briefing notice. In particular, they shall 
not be liable for any loss or damage whatsoever, arising from or in connection 
with the usage of information contained within this notice.

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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