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Home » Hacking News » DSA-116-1: cfs buffer overflow

DSA-116-1: cfs buffer overflow

by Nikola Strahija on March 2nd, 2002 Zorgon found several buffer overflows in cfsd, a daemon that pushes encryption services into the Unix(tm) file system. We are not yet sure if these overflows can successfully be exploited to gain root access to the machine running the CFS daemon. However, since cfsd can easily be forced to die, a malicious user can easily perform a denial of service attack to it.


This problem has been fixed in version 1.3.3-8.1 for the stable Debian
distribution and in version 1.4.1-5 for the testing and undtable
distribution of Debian.

We recommend that you upgrade your cfs package immediately.

wget url
will fetch the file for you
dpkg -i file.deb
will install the referenced file.

If you are using the apt-get package manager, use the line for
sources.list as given below:

apt-get update
will update the internal database
apt-get upgrade
will install corrected packages

You may use an automated update by adding the resources from the
footer to the proper configuration.


Debian GNU/Linux 2.2 alias potato
- ------------------------------------

Source archives:

http://security.debian.org/dists/stable/updates/main/source/cfs_1.3.3-8.1.dsc
MD5 checksum: 566d05bb6f71e3a5dd194a0ceb98952a
http://security.debian.org/dists/stable/updates/main/source/cfs_1.3.3-8.1.diff.gz
MD5 checksum: 7bb4cbf19e8c195f7302a025897fe44d
http://security.debian.org/dists/stable/updates/main/source/cfs_1.3.3.orig.tar.gz
MD5 checksum: cb4c5c107b77a50c25628f6655aae378

Alpha architecture:

http://security.debian.org/dists/stable/updates/main/binary-alpha/cfs_1.3.3-8.1_alpha.deb
MD5 checksum: 2d5b24107abe81a09d5dbd213f0d890b

ARM architecture:

http://security.debian.org/dists/stable/updates/main/binary-arm/cfs_1.3.3-8.1_arm.deb
MD5 checksum: 7712a474e4c67ce30b2a70b29a3f0f64

Intel ia32 architecture:

http://security.debian.org/dists/stable/updates/main/binary-i386/cfs_1.3.3-8.1_i386.deb
MD5 checksum: 33651b606e1fa0dc15c9d7256580df84

Motorola 680x0 architecture:

http://security.debian.org/dists/stable/updates/main/binary-m68k/cfs_1.3.3-8.1_m68k.deb
MD5 checksum: e6078a08a26fe831b3acfddcb6f3c8cd

PowerPC architecture:

http://security.debian.org/dists/stable/updates/main/binary-powerpc/cfs_1.3.3-8.1_powerpc.deb
MD5 checksum: cc13eb33869b2682685b5f073cd33b3c

Sun Sparc architecture:

http://security.debian.org/dists/stable/updates/main/binary-sparc/cfs_1.3.3-8.1_sparc.deb
MD5 checksum: 55ef017e1d3b2ca20fe5c0cf30479901


These files will probably be moved into the stable distribution on
its next revision.

- ---------------------------------------------------------------------------------
For apt-get: deb http://security.debian.org/ stable/updates main
For dpkg-ftp: ftp://security.debian.org/debian-security dists/stable/updates/main
Mailing list: [email protected]
Package info: `apt-cache show ' and http://packages.debian.org/





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