[SECURITY] [DSA 1212-1] New openssh packages fix denial of service

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Debian Security Advisory DSA-1212-1 [email protected]
http://www.debian.org/security/ Noah Meyerhans
November 15, 2006

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Package : openssh (1:3.8.1p1-8.sarge.6)
Vulnerability : Denial of service
Problem type : remote
Debian-specific: no
CVE Id(s) : CVE-2006-4924 CVE-2006-5051
BugTraq ID : 20216 20241
Debian Bug : 392428

Two denial of service vulnerabilities have been found in the OpenSSH
server.

CVE-2006-4924
The sshd support for ssh protcol version 1 does not properly
handle duplicate incoming blocks. This could allow a remote
attacker to cause sshd to consume significant CPU resources
leading to a denial of service.

CVE-2006-5051
A signal handler race condition could potentially allow a remote
attacker to crash sshd and could theoretically lead to the
ability to execute arbitrary code.

For the stable distribution (sarge), these problems have been fixed in
version 1:3.8.1p1-8.sarge.6

For the unstable and testing distributions, these problems have been
fixed in version 1:4.3p2-4

We recommend that you upgrade your openssh package.

Upgrade instructions

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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 3.1 (stable)

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Stable updates are available for alpha, amd64, arm, hppa, i386, ia64, m68k, mips, mipsel, powerpc, s390 and sparc.

Source archives:

http://security.debian.org/pool/updates/main/o/openssh/openssh_3.8.1p1-8.sarge.6.dsc
Size/MD5 checksum: 842 b58f3585c4ce713f58096cc8f86e4550
http://security.debian.org/pool/updates/main/o/openssh/openssh_3.8.1p1.orig.tar.gz
Size/MD5 checksum: 795948 9ce6f2fa5b2931ce2c4c25f3af9ad50d
http://security.debian.org/pool/updates/main/o/openssh/openssh_3.8.1p1-8.sarge.6.diff.gz
Size/MD5 checksum: 157942 413fea91d9074513db60e466ca053f0d

alpha architecture (DEC Alpha)

http://security.debian.org/pool/updates/main/o/openssh/openssh-server-udeb_3.8.1p1-8.sarge.6_alpha.udeb
Size/MD5 checksum: 216100 0595066001c0004f181b58e781153ae2
http://security.debian.org/pool/updates/main/o/openssh/ssh-askpass-gnome_3.8.1p1-8.sarge.6_alpha.deb
Size/MD5 checksum: 52112 dcca41fba77489a57bf5a7e9c9069e90
http://security.debian.org/pool/updates/main/o/openssh/ssh_3.8.1p1-8.sarge.6_alpha.deb
Size/MD5 checksum: 886462 71f73c733794ea68f8c8c6e05ca2e8d3
http://security.debian.org/pool/updates/main/o/openssh/openssh-client-udeb_3.8.1p1-8.sarge.6_alpha.udeb
Size/MD5 checksum: 195114 32b3d7e2b11a5ae016ea19d44380f0d1

amd64 architecture (AMD x86_64 (AMD64))

http://security.debian.org/pool/updates/main/o/openssh/openssh-client-udeb_3.8.1p1-8.sarge.6_amd64.udeb
Size/MD5 checksum: 159608 2d8c050003def7b7a2c8832333f90cf0
http://security.debian.org/pool/updates/main/o/openssh/ssh-askpass-gnome_3.8.1p1-8.sarge.6_amd64.deb
Size/MD5 checksum: 51688 ca60feebdef5f772ab0d42b6fd2c61f0
http://security.debian.org/pool/updates/main/o/openssh/ssh_3.8.1p1-8.sarge.6_amd64.deb
Size/MD5 checksum: 748382 59cebd0c9413b12894b88f9688216847
http://security.debian.org/pool/updates/main/o/openssh/openssh-server-udeb_3.8.1p1-8.sarge.6_amd64.udeb
Size/MD5 checksum: 176252 d886a611e7b150786b6e3ccdac303018

arm architecture (ARM)

http://security.debian.org/pool/updates/main/o/openssh/ssh_3.8.1p1-8.sarge.6_arm.deb
Size/MD5 checksum: 673038 a58f22f69602835be4ebe87493d6f006
http://security.debian.org/pool/updates/main/o/openssh/openssh-server-udeb_3.8.1p1-8.sarge.6_arm.udeb
Size/MD5 checksum: 153938 5c668e80ea8429d686f9f9999b1e450d
http://security.debian.org/pool/updates/main/o/openssh/ssh-askpass-gnome_3.8.1p1-8.sarge.6_arm.deb
Size/MD5 checksum: 51028 3fc55eba3c4ec515fb70220b5f64a8d3
http://security.debian.org/pool/updates/main/o/openssh/openssh-client-udeb_3.8.1p1-8.sarge.6_arm.udeb
Size/MD5 checksum: 144324 f8ca3e9ae3592445e1b18cc84f111f30

hppa architecture (HP PA RISC)

http://security.debian.org/pool/updates/main/o/openssh/openssh-client-udeb_3.8.1p1-8.sarge.6_hppa.udeb
Size/MD5 checksum: 166640 ef7a980dfd7fbb3319d7be72a34783cd
http://security.debian.org/pool/updates/main/o/openssh/ssh-askpass-gnome_3.8.1p1-8.sarge.6_hppa.deb
Size/MD5 checksum: 51764 5e5dfa87acf51e46224f54b3caf39814
http://security.debian.org/pool/updates/main/o/openssh/openssh-server-udeb_3.8.1p1-8.sarge.6_hppa.udeb
Size/MD5 checksum: 176152 480fd653a01de9ec47801b20e28c180a
http://security.debian.org/pool/updates/main/o/openssh/ssh_3.8.1p1-8.sarge.6_hppa.deb
Size/MD5 checksum: 759876 aaced6680806080745d7e7b1b7e16105

i386 architecture (Intel ia32)

http://security.debian.org/pool/updates/main/o/openssh/openssh-client-udeb_3.8.1p1-8.sarge.6_i386.udeb
Size/MD5 checksum: 133076 3e8728a64af00a02dd940350512eb5d9
http://security.debian.org/pool/updates/main/o/openssh/ssh_3.8.1p1-8.sarge.6_i386.deb
Size/MD5 checksum: 688728 15e34bcd846e85fac769f3ac3c90e14b
http://security.debian.org/pool/updates/main/o/openssh/ssh-askpass-gnome_3.8.1p1-8.sarge.6_i386.deb
Size/MD5 checksum: 51336 b0c953a6b2a8d04fd3a384bd987be243
http://security.debian.org/pool/updates/main/o/openssh/openssh-server-udeb_3.8.1p1-8.sarge.6_i386.udeb
Size/MD5 checksum: 146126 d0c4ab7aa9735fa5bd6b5e088cd38fe0

ia64 architecture (Intel ia64)

http://security.debian.org/pool/updates/main/o/openssh/openssh-server-udeb_3.8.1p1-8.sarge.6_ia64.udeb
Size/MD5 checksum: 245060 943b8ef2aa2efebadb1382a17ec73385
http://security.debian.org/pool/updates/main/o/openssh/ssh-askpass-gnome_3.8.1p1-8.sarge.6_ia64.deb
Size/MD5 checksum: 52794 d5152cba549f21aea88e1e4f7e1156f9
http://security.debian.org/pool/updates/main/o/openssh/openssh-client-udeb_3.8.1p1-8.sarge.6_ia64.udeb
Size/MD5 checksum: 223128 c1343bc83aa62b8d4d0669990c890e9a
http://security.debian.org/pool/updates/main/o/openssh/ssh_3.8.1p1-8.sarge.6_ia64.deb
Size/MD5 checksum: 978348 4df605171fec285cf0d63121dcbdc226

m68k architecture (Motorola Mc680x0)

http://security.debian.org/pool/updates/main/o/openssh/openssh-server-udeb_3.8.1p1-8.sarge.6_m68k.udeb
Size/MD5 checksum: 140424 703a06479b9b06d08fdccb08c3c5a0c6
http://security.debian.org/pool/updates/main/o/openssh/openssh-client-udeb_3.8.1p1-8.sarge.6_m68k.udeb
Size/MD5 checksum: 126882 d4a4960f8a81e0325e7e51d9de30ccb2
http://security.debian.org/pool/updates/main/o/openssh/ssh_3.8.1p1-8.sarge.6_m68k.deb
Size/MD5 checksum: 634538 db5bd8d18c409fdd0d32645229cf2b9c
http://security.debian.org/pool/updates/main/o/openssh/ssh-askpass-gnome_3.8.1p1-8.sarge.6_m68k.deb
Size/MD5 checksum: 51254 8b350a4b23bfb3791cba5b48fe5ecd5d

mips architecture (MIPS (Big Endian))

http://security.debian.org/pool/updates/main/o/openssh/openssh-server-udeb_3.8.1p1-8.sarge.6_mips.udeb
Size/MD5 checksum: 180468 e5e51b59cb930e454c30464e386354a4
http://security.debian.org/pool/updates/main/o/openssh/ssh-askpass-gnome_3.8.1p1-8.sarge.6_mips.deb
Size/MD5 checksum: 51652 dc40a74947d6e20dc1069818b0b509e6
http://security.debian.org/pool/updates/main/o/openssh/openssh-client-udeb_3.8.1p1-8.sarge.6_mips.udeb
Size/MD5 checksum: 168434 5c60cab56f8114141c2b66ff11fdb27b
http://security.debian.org/pool/updates/main/o/openssh/ssh_3.8.1p1-8.sarge.6_mips.deb
Size/MD5 checksum: 771620 bbfea051bebdda48d80e2e85e54e59fa

mipsel architecture (MIPS (Little Endian))

http://security.debian.org/pool/updates/main/o/openssh/ssh-askpass-gnome_3.8.1p1-8.sarge.6_mipsel.deb
Size/MD5 checksum: 51598 f1d94e4df1c066c47b1e8b0da68d1af1
http://security.debian.org/pool/updates/main/o/openssh/openssh-client-udeb_3.8.1p1-8.sarge.6_mipsel.udeb
Size/MD5 checksum: 168904 2812bd93c1a73475a2f5da2360c6ae84
http://security.debian.org/pool/updates/main/o/openssh/openssh-server-udeb_3.8.1p1-8.sarge.6_mipsel.udeb
Size/MD5 checksum: 180466 34e765b1bb88443887ab351ca1aed6b5
http://security.debian.org/pool/updates/main/o/openssh/ssh_3.8.1p1-8.sarge.6_mipsel.deb
Size/MD5 checksum: 773824 b999638c312e9d05bd70550afc44e215

powerpc architecture (PowerPC)

http://security.debian.org/pool/updates/main/o/openssh/openssh-server-udeb_3.8.1p1-8.sarge.6_powerpc.udeb
Size/MD5 checksum: 160160 079367a6f51d6b971bb89569098401e3
http://security.debian.org/pool/updates/main/o/openssh/ssh-askpass-gnome_3.8.1p1-8.sarge.6_powerpc.deb
Size/MD5 checksum: 52792 232893927edddfe9e90dddf37e746c12
http://security.debian.org/pool/updates/main/o/openssh/ssh_3.8.1p1-8.sarge.6_powerpc.deb
Size/MD5 checksum: 738392 1b3480543efd3f9314f7a00279b8b995
http://security.debian.org/pool/updates/main/o/openssh/openssh-client-udeb_3.8.1p1-8.sarge.6_powerpc.udeb
Size/MD5 checksum: 151108 6852aaf3e53763b502d7217ad50d44b3

s390 architecture (IBM S/390)

http://security.debian.org/pool/updates/main/o/openssh/ssh-askpass-gnome_3.8.1p1-8.sarge.6_s390.deb
Size/MD5 checksum: 51848 477de6fc5a16e8e9c8a6ee37900a0662
http://security.debian.org/pool/updates/main/o/openssh/openssh-client-udeb_3.8.1p1-8.sarge.6_s390.udeb
Size/MD5 checksum: 163144 ea1c37908db44852a6a8a3c6e9b46d5e
http://security.debian.org/pool/updates/main/o/openssh/ssh_3.8.1p1-8.sarge.6_s390.deb
Size/MD5 checksum: 751564 bce6de0298a3e0e644e7732c1e38b92e
http://security.debian.org/pool/updates/main/o/openssh/openssh-server-udeb_3.8.1p1-8.sarge.6_s390.udeb
Size/MD5 checksum: 174552 31116868d2522f627ad4e03e7a5f83ea

sparc architecture (Sun SPARC/UltraSPARC)

http://security.debian.org/pool/updates/main/o/openssh/ssh_3.8.1p1-8.sarge.6_sparc.deb
Size/MD5 checksum: 678210 eb8315ac61f84552e5d0960974d8b6b8
http://security.debian.org/pool/updates/main/o/openssh/openssh-server-udeb_3.8.1p1-8.sarge.6_sparc.udeb
Size/MD5 checksum: 153190 60ad4beeaa93a360212614fee9059e44
http://security.debian.org/pool/updates/main/o/openssh/ssh-askpass-gnome_3.8.1p1-8.sarge.6_sparc.deb
Size/MD5 checksum: 51102 b7e318e55dd39c2c5a7b47cdea057005
http://security.debian.org/pool/updates/main/o/openssh/openssh-client-udeb_3.8.1p1-8.sarge.6_sparc.udeb
Size/MD5 checksum: 142084 b84f6dd4d0209df91c1f436e80526aea

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

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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: [email protected]
Package info: `apt-cache show <pkg>' and http://packages.debian.org/&lt;pkg&gt;