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UNIRAS Brief - 656/05 - SCO - UnixWare 7.1.4 UnixWare 7.1.3 : cpio race condition and directory traversal issues fixed



 
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   UNIRAS (UK Govt CERT) Briefing Notice - 656/05 dated 19.08.05  Time: 16:21  
  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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SCO - UnixWare 7.1.4 UnixWare 7.1.3 : cpio race condition and directory traversal issues fixed


Detail
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			SCO Security Advisory

Subject:		UnixWare 7.1.4 UnixWare 7.1.3 : cpio race condition and directory traversal issues fixed.
Advisory number: 	SCOSA-2005.32
Issue date: 		2005 August 18
Cross reference:	sr893934 fz532333 erg712854 CAN-2005-1111 CAN-2005-1229 
______________________________________________________________________________


1. Problem Description

	A race condition in cpio 2.6 and earlier allows local users
	to modify permissions of arbitrary files via a hard link
	attack on a file while it is being decompressed, whose
	permissions are changed by cpio after the decompression
	is complete. 

	The Common Vulnerabilities and Exposures project (cve.mitre.org) 
	has assigned the name CAN-2005-1111 to this issue 

	A directory traversal vulnerability in cpio 2.6 and earlier 
	allows remote attackers to write to arbitrary directories 
	via a .. (dot dot) in a cpio file. 

	The Common Vulnerabilities and Exposures project (cve.mitre.org) has
	assigned the name CAN-2005-1229 to this issue


2. Vulnerable Supported Versions

	System				Binaries
	----------------------------------------------------------------------
	UnixWare 7.1.4 			/bin/cpio
	UnixWare 7.1.3 			/bin/cpio


3. Solution

	The proper solution is to install the latest packages.


4. UnixWare 7.1.4

	4.1 Location of Fixed Binaries

	ftp://ftp.sco.com/pub/updates/UnixWare/SCOSA-2005.32

	4.2 Verification

	MD5 (erg712854.uw714.pkg.Z) = a12807ae0a69d88a3b4f0ed7a014f3ef

	md5 is available for download from
		ftp://ftp.sco.com/pub/security/tools

	4.3 Installing Fixed Binaries

	Upgrade the affected binaries with the following sequence:

	Download erg712854.uw714.pkg.Z to the /var/spool/pkg directory

	# uncompress /var/spool/pkg/erg712854.uw714.pkg.Z
	# pkgadd -d /var/spool/pkg/erg712854.uw714.pkg


5. UnixWare 7.1.3

	5.1 Location of Fixed Binaries

	ftp://ftp.sco.com/pub/updates/UnixWare/SCOSA-2005.32

	5.2 Verification

	MD5 (erg712854.uw713.pkg.Z) = 0b514e72f094c21d8c49b359d05e8e7e

	md5 is available for download from
		ftp://ftp.sco.com/pub/security/tools

	5.3 Installing Fixed Binaries

	Upgrade the affected binaries with the following sequence:

	Download erg712854.uw713.pkg.Z to the /var/spool/pkg directory

	# uncompress /var/spool/pkg/erg712854.uw713.pkg.Z
	# pkgadd -d /var/spool/pkg/erg712854.uw713.pkg


6. References

	Specific references for this advisory:
		http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2005-1111
		http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2005-1229
		http://xforce.iss.net/xforce/xfdb/20204

	SCO security resources:
		http://www.sco.com/support/security/index.html

	SCO security advisories via email
		http://www.sco.com/support/forums/security.html

	This security fix closes SCO incidents sr893934 fz532333
	erg712854.


7. Disclaimer

	SCO is not responsible for the misuse of any of the information
	we provide on this website and/or through our security
	advisories. Our advisories are a service to our customers
	intended to promote secure installation and use of SCO
	products.

______________________________________________________________________________

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UNIRAS wishes to acknowledge the contributions of SCO 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 
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<End of UNIRAS Briefing>

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