Debian Security Advisory
DSA-1212-1 openssh -- Denial of service
- Date Reported:
- 15 Nov 2006
- Affected Packages:
- openssh
- Vulnerable:
- Yes
- Security database references:
- In the Debian bugtracking system: Bug 392428.
In the Bugtraq database (at SecurityFocus): BugTraq ID 20216, BugTraq ID 20241.
In Mitre's CVE dictionary: CVE-2006-4924, CVE-2006-5051. - More information:
-
Two denial of service problems have been found in the OpenSSH server. The Common Vulnerabilities and Exposures project identifies the following vulnerabilities:
- CVE-2006-4924
The sshd support for ssh protocol 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.
- CVE-2006-4924
- Fixed in:
-
Debian GNU/Linux 3.1 (stable)
- Source:
- http://security.debian.org/pool/updates/main/o/openssh/openssh_3.8.1p1-8.sarge.6.dsc
- http://security.debian.org/pool/updates/main/o/openssh/openssh_3.8.1p1.orig.tar.gz
- http://security.debian.org/pool/updates/main/o/openssh/openssh_3.8.1p1-8.sarge.6.diff.gz
- http://security.debian.org/pool/updates/main/o/openssh/openssh_3.8.1p1.orig.tar.gz
- Alpha:
- http://security.debian.org/pool/updates/main/o/openssh/openssh-server-udeb_3.8.1p1-8.sarge.6_alpha.udeb
- http://security.debian.org/pool/updates/main/o/openssh/ssh-askpass-gnome_3.8.1p1-8.sarge.6_alpha.deb
- http://security.debian.org/pool/updates/main/o/openssh/ssh_3.8.1p1-8.sarge.6_alpha.deb
- http://security.debian.org/pool/updates/main/o/openssh/openssh-client-udeb_3.8.1p1-8.sarge.6_alpha.udeb
- http://security.debian.org/pool/updates/main/o/openssh/ssh-askpass-gnome_3.8.1p1-8.sarge.6_alpha.deb
- AMD64:
- http://security.debian.org/pool/updates/main/o/openssh/openssh-client-udeb_3.8.1p1-8.sarge.6_amd64.udeb
- http://security.debian.org/pool/updates/main/o/openssh/ssh-askpass-gnome_3.8.1p1-8.sarge.6_amd64.deb
- http://security.debian.org/pool/updates/main/o/openssh/ssh_3.8.1p1-8.sarge.6_amd64.deb
- http://security.debian.org/pool/updates/main/o/openssh/openssh-server-udeb_3.8.1p1-8.sarge.6_amd64.udeb
- http://security.debian.org/pool/updates/main/o/openssh/ssh-askpass-gnome_3.8.1p1-8.sarge.6_amd64.deb
- ARM:
- http://security.debian.org/pool/updates/main/o/openssh/ssh_3.8.1p1-8.sarge.6_arm.deb
- http://security.debian.org/pool/updates/main/o/openssh/openssh-server-udeb_3.8.1p1-8.sarge.6_arm.udeb
- http://security.debian.org/pool/updates/main/o/openssh/ssh-askpass-gnome_3.8.1p1-8.sarge.6_arm.deb
- http://security.debian.org/pool/updates/main/o/openssh/openssh-client-udeb_3.8.1p1-8.sarge.6_arm.udeb
- http://security.debian.org/pool/updates/main/o/openssh/openssh-server-udeb_3.8.1p1-8.sarge.6_arm.udeb
- HPPA:
- http://security.debian.org/pool/updates/main/o/openssh/openssh-client-udeb_3.8.1p1-8.sarge.6_hppa.udeb
- http://security.debian.org/pool/updates/main/o/openssh/ssh-askpass-gnome_3.8.1p1-8.sarge.6_hppa.deb
- http://security.debian.org/pool/updates/main/o/openssh/openssh-server-udeb_3.8.1p1-8.sarge.6_hppa.udeb
- http://security.debian.org/pool/updates/main/o/openssh/ssh_3.8.1p1-8.sarge.6_hppa.deb
- http://security.debian.org/pool/updates/main/o/openssh/ssh-askpass-gnome_3.8.1p1-8.sarge.6_hppa.deb
- Intel IA-32:
- http://security.debian.org/pool/updates/main/o/openssh/openssh-client-udeb_3.8.1p1-8.sarge.6_i386.udeb
- http://security.debian.org/pool/updates/main/o/openssh/ssh_3.8.1p1-8.sarge.6_i386.deb
- http://security.debian.org/pool/updates/main/o/openssh/ssh-askpass-gnome_3.8.1p1-8.sarge.6_i386.deb
- http://security.debian.org/pool/updates/main/o/openssh/openssh-server-udeb_3.8.1p1-8.sarge.6_i386.udeb
- http://security.debian.org/pool/updates/main/o/openssh/ssh_3.8.1p1-8.sarge.6_i386.deb
- Intel IA-64:
- http://security.debian.org/pool/updates/main/o/openssh/openssh-server-udeb_3.8.1p1-8.sarge.6_ia64.udeb
- http://security.debian.org/pool/updates/main/o/openssh/ssh-askpass-gnome_3.8.1p1-8.sarge.6_ia64.deb
- http://security.debian.org/pool/updates/main/o/openssh/openssh-client-udeb_3.8.1p1-8.sarge.6_ia64.udeb
- http://security.debian.org/pool/updates/main/o/openssh/ssh_3.8.1p1-8.sarge.6_ia64.deb
- http://security.debian.org/pool/updates/main/o/openssh/ssh-askpass-gnome_3.8.1p1-8.sarge.6_ia64.deb
- Motorola 680x0:
- http://security.debian.org/pool/updates/main/o/openssh/openssh-server-udeb_3.8.1p1-8.sarge.6_m68k.udeb
- http://security.debian.org/pool/updates/main/o/openssh/openssh-client-udeb_3.8.1p1-8.sarge.6_m68k.udeb
- http://security.debian.org/pool/updates/main/o/openssh/ssh_3.8.1p1-8.sarge.6_m68k.deb
- http://security.debian.org/pool/updates/main/o/openssh/ssh-askpass-gnome_3.8.1p1-8.sarge.6_m68k.deb
- http://security.debian.org/pool/updates/main/o/openssh/openssh-client-udeb_3.8.1p1-8.sarge.6_m68k.udeb
- Big endian MIPS:
- http://security.debian.org/pool/updates/main/o/openssh/openssh-server-udeb_3.8.1p1-8.sarge.6_mips.udeb
- http://security.debian.org/pool/updates/main/o/openssh/ssh-askpass-gnome_3.8.1p1-8.sarge.6_mips.deb
- http://security.debian.org/pool/updates/main/o/openssh/openssh-client-udeb_3.8.1p1-8.sarge.6_mips.udeb
- http://security.debian.org/pool/updates/main/o/openssh/ssh_3.8.1p1-8.sarge.6_mips.deb
- http://security.debian.org/pool/updates/main/o/openssh/ssh-askpass-gnome_3.8.1p1-8.sarge.6_mips.deb
- Little endian MIPS:
- http://security.debian.org/pool/updates/main/o/openssh/ssh-askpass-gnome_3.8.1p1-8.sarge.6_mipsel.deb
- http://security.debian.org/pool/updates/main/o/openssh/openssh-client-udeb_3.8.1p1-8.sarge.6_mipsel.udeb
- http://security.debian.org/pool/updates/main/o/openssh/openssh-server-udeb_3.8.1p1-8.sarge.6_mipsel.udeb
- http://security.debian.org/pool/updates/main/o/openssh/ssh_3.8.1p1-8.sarge.6_mipsel.deb
- http://security.debian.org/pool/updates/main/o/openssh/openssh-client-udeb_3.8.1p1-8.sarge.6_mipsel.udeb
- PowerPC:
- http://security.debian.org/pool/updates/main/o/openssh/openssh-server-udeb_3.8.1p1-8.sarge.6_powerpc.udeb
- http://security.debian.org/pool/updates/main/o/openssh/ssh-askpass-gnome_3.8.1p1-8.sarge.6_powerpc.deb
- http://security.debian.org/pool/updates/main/o/openssh/ssh_3.8.1p1-8.sarge.6_powerpc.deb
- http://security.debian.org/pool/updates/main/o/openssh/openssh-client-udeb_3.8.1p1-8.sarge.6_powerpc.udeb
- http://security.debian.org/pool/updates/main/o/openssh/ssh-askpass-gnome_3.8.1p1-8.sarge.6_powerpc.deb
- IBM S/390:
- http://security.debian.org/pool/updates/main/o/openssh/ssh-askpass-gnome_3.8.1p1-8.sarge.6_s390.deb
- http://security.debian.org/pool/updates/main/o/openssh/openssh-client-udeb_3.8.1p1-8.sarge.6_s390.udeb
- http://security.debian.org/pool/updates/main/o/openssh/ssh_3.8.1p1-8.sarge.6_s390.deb
- http://security.debian.org/pool/updates/main/o/openssh/openssh-server-udeb_3.8.1p1-8.sarge.6_s390.udeb
- http://security.debian.org/pool/updates/main/o/openssh/openssh-client-udeb_3.8.1p1-8.sarge.6_s390.udeb
- Sun Sparc:
- http://security.debian.org/pool/updates/main/o/openssh/ssh_3.8.1p1-8.sarge.6_sparc.deb
- http://security.debian.org/pool/updates/main/o/openssh/openssh-server-udeb_3.8.1p1-8.sarge.6_sparc.udeb
- http://security.debian.org/pool/updates/main/o/openssh/ssh-askpass-gnome_3.8.1p1-8.sarge.6_sparc.deb
- http://security.debian.org/pool/updates/main/o/openssh/openssh-client-udeb_3.8.1p1-8.sarge.6_sparc.udeb
- http://security.debian.org/pool/updates/main/o/openssh/openssh-server-udeb_3.8.1p1-8.sarge.6_sparc.udeb
MD5 checksums of the listed files are available in the original advisory.