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             AUSCERT External Security Bulletin Redistribution

           ESB-2005.0185 -- unace Buffer Overflow and Directory
                         Traversal Vulnerabilities
                             24 February 2005

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        AusCERT Security Bulletin Summary
        ---------------------------------

Product:           unace
Operating System:  UNIX variants
                   Linux variants
                   Mac OS X
Impact:            Execute Arbitrary Code/Commands
                   Overwrite Arbitrary Files
Access:            Remote/Unauthenticated

PROBLEM:  

	Vulnerabilities in unace allow an attacker to execute arbitrary code or
	overwrite arbitrary files by supplying a malicious .ace file.

	1. Multiple buffer overflow vulnerabilities when extracting, listing or
	   testing ACE archives allow execution of arbitrary code.

	2. A directory traversal vulnerability allows overwriting arbitrary 
	   files when extracting a malicious .ace file that contains absolute
	   paths or paths containing "..".

MITIGATION: 

	Patches fixing these vulnerabilities are not yet available. 

	Until a new version is released, users are advised to avoid using 
	unace to open untrusted archives.

REFERENCES:

	[1] Secunia Advisory SA14359
	    http://secunia.com/advisories/14359/

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@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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