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RedHat: 'OpenSSH' Input validation vulnerability Print E-mail
User Rating:      How can I rate this item?
Posted by LinuxSecurity.com Team   
RedHat Linux Updated openssh packages are now available for Red Hat Linux 7, 7.1, 7.2,and 7.3. These updates fix an input validation error in OpenSSH.

---------------------------------------------------------------------
                   Red Hat, Inc. Red Hat Security Advisory

Synopsis:          Updated OpenSSH packages fix various security issues
Advisory ID:       RHSA-2002:127-18
Issue date:        2002-06-24
Updated on:        2002-06-27
Product:           Red Hat Linux
Keywords:          security pam openssh ChallengeResponseAuthentication
Cross references:  
Obsoletes:         RHSA-2002:043

---------------------------------------------------------------------

1. Topic:

Updated openssh packages are now available for Red Hat Linux 7, 7.1, 7.2,
and 7.3.  These updates fix an input validation error in OpenSSH.

2. Relevant releases/architectures:

Red Hat Linux 7.0 - alpha, i386

Red Hat Linux 7.1 - alpha, i386, ia64

Red Hat Linux 7.2 - i386, ia64

Red Hat Linux 7.3 - i386

3. Problem description:

OpenSSH provides an implementation of the SSH (secure shell) protocol used
for logging into and executing commands on remote machines.  

Versions of the OpenSSH server between 2.3.1 and 3.3 contain an input
validation error that can result in an integer overflow and privilege
escalation.

At this time, Red Hat does not believe that the default installation of
OpenSSH on Red Hat Linux is vulnerable to this issue; however a user would
be vulnerable if the configuration option "PAMAuthenticationViaKbdInt" is
enabled in the sshd configuration file (it is not enabled by default).

We have applied the security fix provided by the OpenSSH team to these
errata packages which are based on OpenSSH 3.1p1.  This should minimize the
impact of upgrading to our errata packages.

All users of OpenSSH should update to these errata packages which are not
vulnerable to this issue.

4. Solution:

Before applying this update, make sure all previously released errata
relevant to your system have been applied.

To update all RPMs for your particular architecture, run:

rpm -Fvh [filenames]

where [filenames] is a list of the RPMs you wish to upgrade.  Only those
RPMs which are currently installed will be updated.  Those RPMs which are
not installed but included in the list will not be updated.  Note that you
can also use wildcards (*.rpm) if your current directory *only* contains
the desired RPMs.

Please note that this update is also available via Red Hat Network.  Many
people find this an easier way to apply updates.  To use Red Hat Network,
launch the Red Hat Update Agent with the following command:

up2date

This will start an interactive process that will result in the appropriate
RPMs being upgraded on your system.

5. Bug IDs fixed  (http://bugzilla.Red Hat.com/bugzilla for more info):



6. RPMs required:

Red Hat Linux 7.0:

SRPMS: 
ftp://updates.Red Hat.com/7.0/en/os/SRPMS/openssh-3.1p1-5.src.rpm

alpha: 
ftp://updates.Red Hat.com/7.0/en/os/alpha/openssh-3.1p1-5.alpha.rpm 
ftp://updates.Red Hat.com/7.0/en/os/alpha/openssh-askpass-3.1p1-5.alpha.rpm 
ftp://updates.Red Hat.com/7.0/en/os/alpha/openssh-askpass-gnome-3.1p1-5.alpha.rpm 
ftp://updates.Red Hat.com/7.0/en/os/alpha/openssh-clients-3.1p1-5.alpha.rpm 
ftp://updates.Red Hat.com/7.0/en/os/alpha/openssh-server-3.1p1-5.alpha.rpm

i386: 
ftp://updates.Red Hat.com/7.0/en/os/i386/openssh-3.1p1-5.i386.rpm 
ftp://updates.Red Hat.com/7.0/en/os/i386/openssh-askpass-3.1p1-5.i386.rpm 
ftp://updates.Red Hat.com/7.0/en/os/i386/openssh-askpass-gnome-3.1p1-5.i386.rpm 
ftp://updates.Red Hat.com/7.0/en/os/i386/openssh-clients-3.1p1-5.i386.rpm 
ftp://updates.Red Hat.com/7.0/en/os/i386/openssh-server-3.1p1-5.i386.rpm

Red Hat Linux 7.1:

SRPMS: 
ftp://updates.Red Hat.com/7.1/en/os/SRPMS/openssh-3.1p1-5.src.rpm

alpha: 
ftp://updates.Red Hat.com/7.1/en/os/alpha/openssh-3.1p1-5.alpha.rpm 
ftp://updates.Red Hat.com/7.1/en/os/alpha/openssh-askpass-3.1p1-5.alpha.rpm 
ftp://updates.Red Hat.com/7.1/en/os/alpha/openssh-askpass-gnome-3.1p1-5.alpha.rpm 
ftp://updates.Red Hat.com/7.1/en/os/alpha/openssh-clients-3.1p1-5.alpha.rpm 
ftp://updates.Red Hat.com/7.1/en/os/alpha/openssh-server-3.1p1-5.alpha.rpm

i386: 
ftp://updates.Red Hat.com/7.1/en/os/i386/openssh-3.1p1-5.i386.rpm 
ftp://updates.Red Hat.com/7.1/en/os/i386/openssh-askpass-3.1p1-5.i386.rpm 
ftp://updates.Red Hat.com/7.1/en/os/i386/openssh-askpass-gnome-3.1p1-5.i386.rpm 
ftp://updates.Red Hat.com/7.1/en/os/i386/openssh-clients-3.1p1-5.i386.rpm 
ftp://updates.Red Hat.com/7.1/en/os/i386/openssh-server-3.1p1-5.i386.rpm

ia64: 
ftp://updates.Red Hat.com/7.1/en/os/ia64/openssh-3.1p1-5.ia64.rpm 
ftp://updates.Red Hat.com/7.1/en/os/ia64/openssh-askpass-3.1p1-5.ia64.rpm 
ftp://updates.Red Hat.com/7.1/en/os/ia64/openssh-askpass-gnome-3.1p1-5.ia64.rpm 
ftp://updates.Red Hat.com/7.1/en/os/ia64/openssh-clients-3.1p1-5.ia64.rpm 
ftp://updates.Red Hat.com/7.1/en/os/ia64/openssh-server-3.1p1-5.ia64.rpm

Red Hat Linux 7.2:

SRPMS: 
ftp://updates.Red Hat.com/7.2/en/os/SRPMS/openssh-3.1p1-6.src.rpm

i386: 
ftp://updates.Red Hat.com/7.2/en/os/i386/openssh-3.1p1-6.i386.rpm 
ftp://updates.Red Hat.com/7.2/en/os/i386/openssh-askpass-3.1p1-6.i386.rpm 
ftp://updates.Red Hat.com/7.2/en/os/i386/openssh-askpass-gnome-3.1p1-6.i386.rpm 
ftp://updates.Red Hat.com/7.2/en/os/i386/openssh-clients-3.1p1-6.i386.rpm 
ftp://updates.Red Hat.com/7.2/en/os/i386/openssh-server-3.1p1-6.i386.rpm

ia64: 
ftp://updates.Red Hat.com/7.2/en/os/ia64/openssh-3.1p1-6.ia64.rpm 
ftp://updates.Red Hat.com/7.2/en/os/ia64/openssh-askpass-3.1p1-6.ia64.rpm 
ftp://updates.Red Hat.com/7.2/en/os/ia64/openssh-askpass-gnome-3.1p1-6.ia64.rpm 
ftp://updates.Red Hat.com/7.2/en/os/ia64/openssh-clients-3.1p1-6.ia64.rpm 
ftp://updates.Red Hat.com/7.2/en/os/ia64/openssh-server-3.1p1-6.ia64.rpm

Red Hat Linux 7.3:

SRPMS: 
ftp://updates.Red Hat.com/7.3/en/os/SRPMS/openssh-3.1p1-6.src.rpm

i386: 
ftp://updates.Red Hat.com/7.3/en/os/i386/openssh-3.1p1-6.i386.rpm 
ftp://updates.Red Hat.com/7.3/en/os/i386/openssh-askpass-3.1p1-6.i386.rpm 
ftp://updates.Red Hat.com/7.3/en/os/i386/openssh-askpass-gnome-3.1p1-6.i386.rpm 
ftp://updates.Red Hat.com/7.3/en/os/i386/openssh-clients-3.1p1-6.i386.rpm 
ftp://updates.Red Hat.com/7.3/en/os/i386/openssh-server-3.1p1-6.i386.rpm



7. Verification:

MD5 sum                          Package Name
--------------------------------------------------------------------------
d1f19327b85cddfbcf3167b3374842a7 7.0/en/os/SRPMS/openssh-3.1p1-5.src.rpm
f6176399bd232630f8bb517d8f4dd42e 7.0/en/os/alpha/openssh-3.1p1-5.alpha.rpm
92807b7217c777dda6b9a43dbe7ce7fd 7.0/en/os/alpha/openssh-askpass-3.1p1-5.alpha.rpm
9eea8c2d710290d4d7425c03aef26d2e 7.0/en/os/alpha/openssh-askpass-gnome-3.1p1-5.alpha.rpm
d3f22ca75eb56ac35f0084b5f25df3cb 7.0/en/os/alpha/openssh-clients-3.1p1-5.alpha.rpm
8f7553265365190f8714ff67a94af972 7.0/en/os/alpha/openssh-server-3.1p1-5.alpha.rpm
ea1910c305cd61e437271885280d5268 7.0/en/os/i386/openssh-3.1p1-5.i386.rpm
db93fb0988ce7408f7f77a4589fd85b2 7.0/en/os/i386/openssh-askpass-3.1p1-5.i386.rpm
998bb0b0e59a864d5156ec6c7e2a667f 7.0/en/os/i386/openssh-askpass-gnome-3.1p1-5.i386.rpm
3071cba22fb9d00ea74275ddd6849e07 7.0/en/os/i386/openssh-clients-3.1p1-5.i386.rpm
4cb070808101c4f24cf892782556f734 7.0/en/os/i386/openssh-server-3.1p1-5.i386.rpm
d1f19327b85cddfbcf3167b3374842a7 7.1/en/os/SRPMS/openssh-3.1p1-5.src.rpm
f6176399bd232630f8bb517d8f4dd42e 7.1/en/os/alpha/openssh-3.1p1-5.alpha.rpm
92807b7217c777dda6b9a43dbe7ce7fd 7.1/en/os/alpha/openssh-askpass-3.1p1-5.alpha.rpm
9eea8c2d710290d4d7425c03aef26d2e 7.1/en/os/alpha/openssh-askpass-gnome-3.1p1-5.alpha.rpm
d3f22ca75eb56ac35f0084b5f25df3cb 7.1/en/os/alpha/openssh-clients-3.1p1-5.alpha.rpm
8f7553265365190f8714ff67a94af972 7.1/en/os/alpha/openssh-server-3.1p1-5.alpha.rpm
ea1910c305cd61e437271885280d5268 7.1/en/os/i386/openssh-3.1p1-5.i386.rpm
db93fb0988ce7408f7f77a4589fd85b2 7.1/en/os/i386/openssh-askpass-3.1p1-5.i386.rpm
998bb0b0e59a864d5156ec6c7e2a667f 7.1/en/os/i386/openssh-askpass-gnome-3.1p1-5.i386.rpm
3071cba22fb9d00ea74275ddd6849e07 7.1/en/os/i386/openssh-clients-3.1p1-5.i386.rpm
4cb070808101c4f24cf892782556f734 7.1/en/os/i386/openssh-server-3.1p1-5.i386.rpm
76771fe005710068cf7e77304d8e8c2d 7.1/en/os/ia64/openssh-3.1p1-5.ia64.rpm
c1f660a37ac295a9d7f76c18c4e39a97 7.1/en/os/ia64/openssh-askpass-3.1p1-5.ia64.rpm
d3dba2c6749555920d33a2bbf5c34bc7 7.1/en/os/ia64/openssh-askpass-gnome-3.1p1-5.ia64.rpm
b1fbb0c89efdb666ca834d73776caef3 7.1/en/os/ia64/openssh-clients-3.1p1-5.ia64.rpm
41a2988a28bc02ed2d7268fedec3656d 7.1/en/os/ia64/openssh-server-3.1p1-5.ia64.rpm
84d1b32febbd22bcc76d44d3d985cf0d 7.2/en/os/SRPMS/openssh-3.1p1-6.src.rpm
a634222cd0d59ce1e9510323128fc34b 7.2/en/os/i386/openssh-3.1p1-6.i386.rpm
1d84ecee0666441698fe7686c2f5ac3f 7.2/en/os/i386/openssh-askpass-3.1p1-6.i386.rpm
7f568c333c7f15e2608b2adc134ad65a 7.2/en/os/i386/openssh-askpass-gnome-3.1p1-6.i386.rpm
f7c7bcce4abd79c9604b0d43a7978cc1 7.2/en/os/i386/openssh-clients-3.1p1-6.i386.rpm
c40ab32a22bac14625a845e342512785 7.2/en/os/i386/openssh-server-3.1p1-6.i386.rpm
892dd7540ed71c530949baf736a4e96d 7.2/en/os/ia64/openssh-3.1p1-6.ia64.rpm
8dc28e066ad28fb16d57319af0297d47 7.2/en/os/ia64/openssh-askpass-3.1p1-6.ia64.rpm
317f50806f05d91df9f7742c8b6b1297 7.2/en/os/ia64/openssh-askpass-gnome-3.1p1-6.ia64.rpm
e037c1229d3062c6ff3d2a5c022787dc 7.2/en/os/ia64/openssh-clients-3.1p1-6.ia64.rpm
f067a362f3dd6b838476c93cfedc740a 7.2/en/os/ia64/openssh-server-3.1p1-6.ia64.rpm
84d1b32febbd22bcc76d44d3d985cf0d 7.3/en/os/SRPMS/openssh-3.1p1-6.src.rpm
a634222cd0d59ce1e9510323128fc34b 7.3/en/os/i386/openssh-3.1p1-6.i386.rpm
1d84ecee0666441698fe7686c2f5ac3f 7.3/en/os/i386/openssh-askpass-3.1p1-6.i386.rpm
7f568c333c7f15e2608b2adc134ad65a 7.3/en/os/i386/openssh-askpass-gnome-3.1p1-6.i386.rpm
f7c7bcce4abd79c9604b0d43a7978cc1 7.3/en/os/i386/openssh-clients-3.1p1-6.i386.rpm
c40ab32a22bac14625a845e342512785 7.3/en/os/i386/openssh-server-3.1p1-6.i386.rpm
 

These packages are GPG signed by Red Hat, Inc. for security.  Our key
is available at:
     http://www.Red Hat.com/about/contact/pgpkey.html

You can verify each package with the following command:
    rpm --checksig  

If you only wish to verify that each package has not been corrupted or
tampered with, examine only the md5sum with the following command:
    rpm --checksig --nogpg 

8. References:
 
http://marc.theaimsgroup.com/?l=openssh-unix-dev&m=102510268109227 
http://marc.theaimsgroup.com/?l=openssh-unix-dev&m=102511867031136



Copyright(c) 2000, 2001, 2002 Red Hat, Inc.





 
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