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TUCoPS :: Linux :: Apps A-M :: hack1097.htm

Fetchmail 6.2.4 and earlier remote dennial of service (OpenLinux)



OpenLinux: Fetchmail 6.2.4 and earlier remote dennial of service


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______________________________________________________________________________

			SCO Security Advisory

Subject:		OpenLinux: Fetchmail 6.2.4 and earlier remote dennial of service 
Advisory number: 	CSSA-2004-004.0
Issue date: 		2004 February 19
Cross reference:	sr886097 fz528427 erg712468 CAN-2003-0792
______________________________________________________________________________


1. Problem Description

	Fetchmail 6.2.4 and earlier does not properly allocate memory for
	long lines, which allows remote attackers to cause a denial of
	service (crash) via a certain email. 

	Fetchmail is a full-featured, robust, well-documented remote-mail 
	retrieval and forwarding utility intended to be used over on-
	demand TCP/IP links (such as SLIP or PPP connections). It supports 
	every remote-mail protocol now in use on the Internet: POP2, POP3, 
	RPOP, APOP, KPOP, all flavors of IMAP, ETRN, and ODMR. It can even 
	support IPv6 and IPSEC. 

	Fetchmail retrieves mail from remote mail servers and forwards it 
	via SMTP, so it can then be read by normal mail user agents such as 
	mutt, elm(1) or BSD Mail. It allows all your system MTA's filtering, 
	forwarding, and aliasing facilities to work just as they would on 
	normal mail. 

	The Common Vulnerabilities and Exposures project (cve.mitre.org) has 
	assigned the name CAN-2003-0792 to this issue.


2. Vulnerable Supported Versions

	System				Package
	----------------------------------------------------------------------
	OpenLinux 3.1.1 Server		prior to fetchmail-6.2.5-1.i386.rpm
					prior to fetchmailconf-6.2.5-1.i386.rpm

	OpenLinux 3.1.1 Workstation	prior to fetchmail-6.2.5-1.i386.rpm
					prior to fetchmailconf-6.2.5-1.i386.rpm


3. Solution

	The proper solution is to install the latest packages. Many
	customers find it easier to use the Caldera System Updater, called
	cupdate (or kcupdate under the KDE environment), to update these
	packages rather than downloading and installing them by hand.


4. OpenLinux 3.1.1 Server

	4.1 Package Location

	ftp://ftp.sco.com/pub/updates/OpenLinux/3.1.1/Server/CSSA-2004-00 4.0/RPMS

	4.2 Packages

	60ded90624478cf42bbafdb3530b1431	fetchmail-6.2.5-1.i386.rpm
	b5812d5463a264a37dbeac6a3f3084f0	fetchmailconf-6.2.5-1.i386.rpm

	4.3 Installation

	rpm -Fvh fetchmail-6.2.5-1.i386.rpm
	rpm -Fvh fetchmailconf-6.2.5-1.i386.rpm

	4.4 Source Package Location

	ftp://ftp.sco.com/pub/updates/OpenLinux/3.1.1/Server/CSSA-2004-00 4.0/SRPMS

	4.5 Source Packages

	f7fea66f02c98436847aab205922a180	fetchmail-6.2.5-1.src.rpm


5. OpenLinux 3.1.1 Workstation

	5.1 Package Location

	ftp://ftp.sco.com/pub/updates/OpenLinux/3.1.1/Workstation/CSSA-200 4-004.0/RPMS

	5.2 Packages

	195568e0570b8e0682d93b3d27a4d3de	fetchmail-6.2.5-1.i386.rpm
	7d81aed49392ce9df04ae4b421fd80e7	fetchmailconf-6.2.5-1.i386.rpm

	5.3 Installation

	rpm -Fvh fetchmail-6.2.5-1.i386.rpm
	rpm -Fvh fetchmailconf-6.2.5-1.i386.rpm

	5.4 Source Package Location

	ftp://ftp.sco.com/pub/updates/OpenLinux/3.1.1/Workstation/CSSA-200 4-004.0/SRPMS

	5.5 Source Packages

	3035d06b88de3840707e2e180304ee53	fetchmail-6.2.5-1.src.rpm


6. References

	Specific references for this advisory:
		http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2003-0792 

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

	This security fix closes SCO incidents sr886097 fz528427
	erg712468.


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.


8. Acknowledgements

	SCO would like to thank Dave Jones and Mark Cox at Red Hat.

______________________________________________________________________________

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