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Red Hat: RHSA-2000:111-04 Critical: OpenSSH Port Forwarding Risk

red hat
Calendar Grey November 27, 2000
Dist Redhat Esm H88
Updated OpenSSH packages launched for Red Hat Enterprise Linux 7 to mitigate risks associated with unapproved server entry.
An OpenSSH client will do agent or X11 forwarding at the request of a server, even if the user has not requested that it be done.

Solution

For each RPM for your particular architecture, run:



rpm -Fvh [filename]



where filename is the name of the RPM.

5. Bug IDs fixed ( for more info):

18598 - ssh-keygen -l does not work for dsa keys 20805 - Hostile servers can force OpenSSH clients to do agent or X11 forwarding 20884 - openssh-2.3.0p1 doesn't include /etc/ssh/primes


6. RPMs required:

Red Hat Linux 7.0:

alpha:






i386:






sources:


7. Verification:

MD5 sum Package Name d564b593cce6c1afaa02a11004ef6cf7 7.0/SRPMS/openssh-2.3.0p1-4.src.rpm cfa7b84d1389e921d11cd93888014bbe 7.0/alpha/openssh-2.3.0p1-4.alpha.rpm 59464df875127cc44ca1976db62bb977 7.0/alpha/openssh-askpass-2.3.0p1-4.alpha.rpm 957467291fc0067d70bef99c88401dcf 7.0/alpha/openssh-askpass-gnome-2.3.0p1-4.alpha.rpm da26d6a308c2c3c79f56eec077bce664 7.0/alpha/openssh-clients-2.3.0p1-4.alpha.rpm 5e4951bc163601aad8733011933d79db 7.0/alpha/openssh-server-2.3.0p1-4.alpha.rpm 973c033bd3cf3e3641f7fb9d172baf5a 7.0/i386/openssh-2.3.0p1-4.i386.rpm ead1cc84519f5a6fa0233ce8d3237457 7.0/i386/openssh-askpass-2.3.0p1-4.i386.rpm d426ff6c55181f8ccbea6e2f7a307b99 7.0/i386/openssh-askpass-gnome-2.3.0p1-4.i386.rpm 51fe082e6830e461a900000e2884cb14 7.0/i386/openssh-clients-2.3.0p1-4.i386.rpm dd9bb3271403162202599d3cd8b9a22e 7.0/i386/openssh-server-2.3.0p1-4.i386.rpm

These packages are GPG signed by Red Hat, Inc. for security. Our key is available at:


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

Summary

References

OpenBSD 2.7 Errata Copyright(c) 2000 Red Hat, Inc. `

Package List


Severity
critical
Lowest
Low
Medium
High
Critical

Advisory ID: RHSA-2000:111-04
Issue date: 2000-11-20
Updated on: 2000-11-27
Product: Red Hat Linux
Keywords: openssh malicious server port forwarding
Cross references: N/A

Topic

Relevant Releases Architectures

Red Hat Linux 7.0 - i386, alpha

Bugs Fixed

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