Protect yourself against future threats.
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AUSCERT External Security Bulletin Redistribution
ESB-2002.646 -- Debian Security Advisory DSA 198-1
New nullmailer packages fix local denial of service
19 November 2002
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AusCERT Security Bulletin Summary
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Product: nullmailer
Vendor: Debian
Operating System: Debian GNU/Linux 3.0
Impact: Denial of Service
Access Required: Existing Account
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Debian Security Advisory DSA 198-1 security@debian.org
http://www.debian.org/security/ Martin Schulze
November 18th, 2002 http://www.debian.org/security/faq
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Package : nullmailer
Vulnerability : denial of service
Problem-type : local
Debian-specific: no
A problem has been discovered in nullmailer, a simple relay-only mail
transport agent for hosts that relay mail to a fixed set of smart
relays. When a mail is to be delivered locally to a user that doesn't
exist, nullmailer tries to deliver it, discovers a user unknown error
and stops delivering. Unfortunately, it stops delivering entirely,
not only this mail. Hence, it's very easy to craft a denial of service.
This problem has been fixed in version 1.00RC5-16.1woody2 for the
current stable distribution (woody) and in version 1.00RC5-17 for the
unstable distribution (sid). The old stable distribution (potato)
does not contain a nullmailer package.
We recommend that you upgrade your nullmailer package.
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 3.0 alias woody
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Source archives:
http://security.debian.org/pool/updates/main/n/nullmailer/nullmailer_1.00RC5-16.1woody2.dsc
Size/MD5 checksum: 602 39d11580de5a781c1cadf6d422164d8c
http://security.debian.org/pool/updates/main/n/nullmailer/nullmailer_1.00RC5-16.1woody2.diff.gz
Size/MD5 checksum: 6298 179e56c04af207b19ff020f66b580419
http://security.debian.org/pool/updates/main/n/nullmailer/nullmailer_1.00RC5.orig.tar.gz
Size/MD5 checksum: 111691 61041ff5b1e41f9280d63a04c3383144
Alpha architecture:
http://security.debian.org/pool/updates/main/n/nullmailer/nullmailer_1.00RC5-16.1woody2_alpha.deb
Size/MD5 checksum: 103944 e46443575ae0a0d55475423b1e31bdeb
ARM architecture:
http://security.debian.org/pool/updates/main/n/nullmailer/nullmailer_1.00RC5-16.1woody2_arm.deb
Size/MD5 checksum: 70804 2feab48d3941330c03f00567488831f5
Intel IA-32 architecture:
http://security.debian.org/pool/updates/main/n/nullmailer/nullmailer_1.00RC5-16.1woody2_i386.deb
Size/MD5 checksum: 68558 ec8e1b3f33bc436897358c80a6f43b3c
Intel IA-64 architecture:
http://security.debian.org/pool/updates/main/n/nullmailer/nullmailer_1.00RC5-16.1woody2_ia64.deb
Size/MD5 checksum: 144246 c508c104d7b775e84641aabdc2adf209
HP Precision architecture:
http://security.debian.org/pool/updates/main/n/nullmailer/nullmailer_1.00RC5-16.1woody2_hppa.deb
Size/MD5 checksum: 88306 87b75f52b7ae1e8bdab2a121b79492bd
Motorola 680x0 architecture:
http://security.debian.org/pool/updates/main/n/nullmailer/nullmailer_1.00RC5-16.1woody2_m68k.deb
Size/MD5 checksum: 67616 29f83614261e229bff40b1c54b12fa3b
Big endian MIPS architecture:
http://security.debian.org/pool/updates/main/n/nullmailer/nullmailer_1.00RC5-16.1woody2_mips.deb
Size/MD5 checksum: 102682 91e6a2aabc65fb2b430619dc625a6485
Little endian MIPS architecture:
http://security.debian.org/pool/updates/main/n/nullmailer/nullmailer_1.00RC5-16.1woody2_mipsel.deb
Size/MD5 checksum: 101292 83745fe1ea40cdefb298e2d55f1e0a2b
PowerPC architecture:
http://security.debian.org/pool/updates/main/n/nullmailer/nullmailer_1.00RC5-16.1woody2_powerpc.deb
Size/MD5 checksum: 73996 81bbf1beb5a46a08405d1e4535b4ae44
IBM S/390 architecture:
http://security.debian.org/pool/updates/main/n/nullmailer/nullmailer_1.00RC5-16.1woody2_s390.deb
Size/MD5 checksum: 72914 3e5608138030d4577e14e0f17144a2ff
Sun Sparc architecture:
http://security.debian.org/pool/updates/main/n/nullmailer/nullmailer_1.00RC5-16.1woody2_sparc.deb
Size/MD5 checksum: 73748 cb947e14ce9c2803d55f959d4f03f454
These files will probably be moved into the stable distribution on
its next revision.
Survey on the use of Debian GNU/Linux 2.2 alias potato:
http://lists.debian.org/debian-devel-announce-0211/msg00001.html
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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: debian-security-announce@lists.debian.org
Package info: `apt-cache show <pkg>' and http://packages.debian.org/<pkg>
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