OpenSSH Privilege Separation Key Signature Weakness

BID:20956

Info

OpenSSH Privilege Separation Key Signature Weakness

Bugtraq ID: 20956
Class: Design Error
CVE: CVE-2006-5794
Remote: Yes
Local: No
Published: Nov 07 2006 12:00AM
Updated: Mar 19 2015 09:20AM
Credit: The vendor disclosed this weakness.
Vulnerable: Turbolinux Turbolinux Server 10.0 x86
Turbolinux Turbolinux Server 10.0
Turbolinux Turbolinux Server 8.0
Turbolinux Turbolinux Desktop 10.0
Turbolinux Turbolinux FUJI
Turbolinux Turbolinux 10 F...
TurboLinux Personal
TurboLinux Multimedia
Turbolinux Home
Turbolinux Appliance Server Workgroup Edition 1.0
Turbolinux Appliance Server Hosting Edition 1.0
Turbolinux Appliance Server 1.0 Workgroup Edition
Turbolinux Appliance Server 1.0 Hosting Edition
Turbolinux Appliance Server 2.0
Trustix Secure Linux 3.0
Trustix Secure Linux 2.2
Trustix Operating System Enterprise Server 2.0
Tevfik Karagulle cwRsync 2.0.9
Tevfik Karagulle copSSH 1.4
SuSE SUSE Linux Enterprise Server 9
SuSE SUSE Linux Enterprise Server 8
+ Linux kernel 2.4.21
+ Linux kernel 2.4.19
SuSE SUSE Linux Enterprise Server 10
SuSE SUSE Linux Enterprise Desktop 10
SGI Advanced Linux Environment 3.0
S.u.S.E. UnitedLinux 1.0
S.u.S.E. SuSE Linux Standard Server 8.0
S.u.S.E. SuSE Linux School Server for i386
S.u.S.E. SUSE LINUX Retail Solution 8.0
S.u.S.E. SuSE Linux Openexchange Server 4.0
S.u.S.E. Open-Enterprise-Server 9.0
S.u.S.E. Novell Linux Desktop 9.0
S.u.S.E. Linux Professional 10.0 OSS
S.u.S.E. Linux Professional 9.3 x86_64
S.u.S.E. Linux Professional 9.3
S.u.S.E. Linux Professional 9.2 x86_64
S.u.S.E. Linux Professional 9.2
S.u.S.E. Linux Professional 9.1 x86_64
S.u.S.E. Linux Professional 9.1
S.u.S.E. Linux Professional 9.0 x86_64
S.u.S.E. Linux Professional 9.0
S.u.S.E. Linux Professional 8.2
S.u.S.E. Linux Professional 7.3
S.u.S.E. Linux Professional 10.1
S.u.S.E. Linux Personal 10.0 OSS
S.u.S.E. Linux Personal 9.3 x86_64
S.u.S.E. Linux Personal 9.3
S.u.S.E. Linux Personal 9.2 x86_64
S.u.S.E. Linux Personal 9.2
S.u.S.E. Linux Personal 9.1 x86_64
S.u.S.E. Linux Personal 9.1
S.u.S.E. Linux Personal 9.0 x86_64
S.u.S.E. Linux Personal 9.0
S.u.S.E. Linux Personal 8.2
S.u.S.E. Linux Personal 10.1
rPath rPath Linux 1
RedHat Enterprise Linux WS 4
RedHat Enterprise Linux WS 3
RedHat Enterprise Linux ES 4
RedHat Enterprise Linux ES 3
RedHat Desktop 4.0
RedHat Desktop 3.0
Red Hat Enterprise Linux AS 4
Red Hat Enterprise Linux AS 3
OpenSSH OpenSSH 4.4
OpenPKG OpenPKG Stable
OpenPKG OpenPKG E1.0-Solid
OpenPKG OpenPKG Current
OpenPKG OpenPKG 2-Stable-20061018
Mandriva Linux Mandrake 2006.0 x86_64
Mandriva Linux Mandrake 2006.0
Mandriva Linux Mandrake 2007.0 x86_64
Mandriva Linux Mandrake 2007.0
MandrakeSoft Multi Network Firewall 2.0
MandrakeSoft Corporate Server 4.0 x86_64
MandrakeSoft Corporate Server 3.0 x86_64
MandrakeSoft Corporate Server 3.0
MandrakeSoft Corporate Server 4.0
Avaya SES 2.0
Avaya S8710 R2.0.1
Avaya S8710 R2.0.0
Avaya S8710 CM 3.1
Avaya S8710 CM 2.0
Avaya S8700 R2.0.1
Avaya S8700 R2.0.0
Avaya S8700 CM 3.1
Avaya S8700 CM 2.0
Avaya S8500 R2.0.1
Avaya S8500 R2.0.0
Avaya S8500 CM 3.1
Avaya S8500 CM 2.0
Avaya S8500 0
Avaya S8300 R2.0.1
Avaya S8300 R2.0.0
Avaya S8300 CM 3.1
Avaya S8300 CM 2.0
Avaya S8300 0
Avaya Messaging Storage Server MM3.0
Avaya Messaging Storage Server 2.0
Avaya Messaging Storage Server 1.0
Avaya Message Networking
Avaya Intuity LX
Avaya CCS 3.0
Avaya CCS 2.0
Avaya Aura SIP Enablement Services 3.0
Not Vulnerable: Tevfik Karagulle cwRsync 2.0.10
Tevfik Karagulle copSSH 1.4.1
OpenSSH OpenSSH 4.5

Discussion

OpenSSH Privilege Separation Key Signature Weakness

OpenSSH is prone to a weakness that may allow attackers to authenticate without proper key signatures. This issue is due to a design error between privileged processes and their child processes.

Little is known regarding this vulnerability; more information will be added to this BID when it becomes available.

OpenSSH version 4.4 is vulnerable; other versions may also be affected.

Note that this weakness is not known to be exploitable unless other vulnerabilites are present.

Exploit / POC

OpenSSH Privilege Separation Key Signature Weakness

Currently we are not aware of any exploits for this issue. If you feel we are in error or if you are aware of more recent information, please mail us at: [email protected]

Solution / Fix

OpenSSH Privilege Separation Key Signature Weakness

Solution:
The vendor has released version 4.5 to address this issue; please see the references for details.


Turbolinux Turbolinux 10 F...

OpenSSH OpenSSH 4.4

Turbolinux Home

Turbolinux Turbolinux FUJI

Turbolinux Appliance Server 2.0

TurboLinux Personal

Turbolinux Appliance Server 1.0 Hosting Edition

Turbolinux Appliance Server 1.0 Workgroup Edition

Tevfik Karagulle copSSH 1.4

Turbolinux Turbolinux Server 10.0

Turbolinux Turbolinux Desktop 10.0

Tevfik Karagulle cwRsync 2.0.9

Trustix Secure Linux 2.2

References

OpenSSH Privilege Separation Key Signature Weakness

References:
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