Skip to navigation

Security Advisory openssh security update

Advisory: RHSA-2005:481-03
Type: Security Advisory
Severity: Low
Issued on: 2005-06-02
Last updated on: 2005-06-02
Affected Products: Red Hat Enterprise Linux AS (v. 2.1)
Red Hat Enterprise Linux ES (v. 2.1)
Red Hat Enterprise Linux WS (v. 2.1)
Red Hat Linux Advanced Workstation 2.1 for the Itanium Processor
CVEs (cve.mitre.org): CVE-2004-0175

Details

Updated openssh packages that fix a potential security vulnerability and
various other bugs are now available for Red Hat Enterprise Linux 2.1.

This update has been rated as having low security impact by the Red Hat
Security Response Team.

OpenSSH is OpenBSD's SSH (Secure SHell) protocol implementation. SSH
replaces rlogin and rsh, and provides secure encrypted communications
between two untrusted hosts over an insecure network. X11 connections and
arbitrary TCP/IP ports can also be forwarded over a secure channel. Public
key authentication can be used for "passwordless" access to servers.

The scp protocol allows a server to instruct a client to write to arbitrary
files outside of the current directory. This could potentially cause a
security issue if a user uses scp to copy files from a malicious server.
The Common Vulnerabilities and Exposures project (cve.mitre.org) has
assigned the name CAN-2004-0175 to this issue.

These updated packages also correct the following bug:

On systems in which direct ssh access for the root user was disabled by
configuration (setting "PermitRootLogin no"), attempts to guess the root
password could be judged as sucessful or unsucessful by observing a delay.

Users of openssh should upgrade to these updated packages, which contain
backported patches to resolve these issues.


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.

If up2date fails to connect to Red Hat Network due to SSL
Certificate Errors, you need to install a version of the
up2date client with an updated certificate. The latest version of
up2date is available from the Red Hat FTP site and may also be
downloaded directly from the RHN website:

https://rhn.redhat.com/help/latest-up2date.pxt

Updated packages

Red Hat Enterprise Linux AS (v. 2.1)

SRPMS:
openssh-3.1p1-18.src.rpm
File outdated by:  RHSA-2006:0698
    MD5: cbfd591f56a699edc21db98ddbe7f4f0
 
IA-32:
openssh-3.1p1-18.i386.rpm
File outdated by:  RHSA-2006:0698
    MD5: f9a4ad5d4502a22246188c193300b05e
openssh-askpass-3.1p1-18.i386.rpm
File outdated by:  RHSA-2006:0698
    MD5: f55b10b912864dd554ed4907e62da0a5
openssh-askpass-gnome-3.1p1-18.i386.rpm
File outdated by:  RHSA-2006:0698
    MD5: eadfcea8a8dec401a5df795bec13c6cd
openssh-clients-3.1p1-18.i386.rpm
File outdated by:  RHSA-2006:0698
    MD5: afe0e8f5dceaa347cbde08277f17c3d2
openssh-server-3.1p1-18.i386.rpm
File outdated by:  RHSA-2006:0698
    MD5: b11eb4ff417d5c52e07b6dcc911cffab
 
IA-64:
openssh-3.1p1-18.ia64.rpm
File outdated by:  RHSA-2006:0698
    MD5: 41edd025b8c1085e0bfe7c0a3a922151
openssh-askpass-3.1p1-18.ia64.rpm
File outdated by:  RHSA-2006:0698
    MD5: f07ea6b9c163aa0a10d9f192d60e5432
openssh-askpass-gnome-3.1p1-18.ia64.rpm
File outdated by:  RHSA-2006:0698
    MD5: 84e4947066a71f613b29320c82d2a862
openssh-clients-3.1p1-18.ia64.rpm
File outdated by:  RHSA-2006:0698
    MD5: 09351afec720211c67a4694c848dde3d
openssh-server-3.1p1-18.ia64.rpm
File outdated by:  RHSA-2006:0698
    MD5: 0e0035471647317e577c92c7a8445123
 
Red Hat Enterprise Linux ES (v. 2.1)

SRPMS:
openssh-3.1p1-18.src.rpm
File outdated by:  RHSA-2006:0698
    MD5: cbfd591f56a699edc21db98ddbe7f4f0
 
IA-32:
openssh-3.1p1-18.i386.rpm
File outdated by:  RHSA-2006:0698
    MD5: f9a4ad5d4502a22246188c193300b05e
openssh-askpass-3.1p1-18.i386.rpm
File outdated by:  RHSA-2006:0698
    MD5: f55b10b912864dd554ed4907e62da0a5
openssh-askpass-gnome-3.1p1-18.i386.rpm
File outdated by:  RHSA-2006:0698
    MD5: eadfcea8a8dec401a5df795bec13c6cd
openssh-clients-3.1p1-18.i386.rpm
File outdated by:  RHSA-2006:0698
    MD5: afe0e8f5dceaa347cbde08277f17c3d2
openssh-server-3.1p1-18.i386.rpm
File outdated by:  RHSA-2006:0698
    MD5: b11eb4ff417d5c52e07b6dcc911cffab
 
Red Hat Enterprise Linux WS (v. 2.1)

SRPMS:
openssh-3.1p1-18.src.rpm
File outdated by:  RHSA-2006:0698
    MD5: cbfd591f56a699edc21db98ddbe7f4f0
 
IA-32:
openssh-3.1p1-18.i386.rpm
File outdated by:  RHSA-2006:0698
    MD5: f9a4ad5d4502a22246188c193300b05e
openssh-askpass-3.1p1-18.i386.rpm
File outdated by:  RHSA-2006:0698
    MD5: f55b10b912864dd554ed4907e62da0a5
openssh-askpass-gnome-3.1p1-18.i386.rpm
File outdated by:  RHSA-2006:0698
    MD5: eadfcea8a8dec401a5df795bec13c6cd
openssh-clients-3.1p1-18.i386.rpm
File outdated by:  RHSA-2006:0698
    MD5: afe0e8f5dceaa347cbde08277f17c3d2
openssh-server-3.1p1-18.i386.rpm
File outdated by:  RHSA-2006:0698
    MD5: b11eb4ff417d5c52e07b6dcc911cffab
 
Red Hat Linux Advanced Workstation 2.1 for the Itanium Processor

SRPMS:
openssh-3.1p1-18.src.rpm
File outdated by:  RHSA-2006:0698
    MD5: cbfd591f56a699edc21db98ddbe7f4f0
 
IA-64:
openssh-3.1p1-18.ia64.rpm
File outdated by:  RHSA-2006:0698
    MD5: 41edd025b8c1085e0bfe7c0a3a922151
openssh-askpass-3.1p1-18.ia64.rpm
File outdated by:  RHSA-2006:0698
    MD5: f07ea6b9c163aa0a10d9f192d60e5432
openssh-askpass-gnome-3.1p1-18.ia64.rpm
File outdated by:  RHSA-2006:0698
    MD5: 84e4947066a71f613b29320c82d2a862
openssh-clients-3.1p1-18.ia64.rpm
File outdated by:  RHSA-2006:0698
    MD5: 09351afec720211c67a4694c848dde3d
openssh-server-3.1p1-18.ia64.rpm
File outdated by:  RHSA-2006:0698
    MD5: 0e0035471647317e577c92c7a8445123
 

Bugs fixed (see bugzilla for more information)

146881 - CAN-2004-0175 malicious ssh server can cause scp to write to arbitrary files
146882 - SSH allows attacker to divine root password


References


Keywords

login, root, scp


These packages are GPG signed by Red Hat for security. Our key and details on how to verify the signature are available from:
https://www.redhat.com/security/team/key/#package

The Red Hat security contact is secalert@redhat.com. More contact details at http://www.redhat.com/security/team/contact/