Red Hat: 'openssh' update
Summary
Summary
Weaknesses in the SSH protocols can be used by a passive attacker to deduceinformation about passwords entered over an encrypted connection. Thisinformation can be used to reduce the number of possible solutions whichneed to be tested to perform a brute-force attack. This reduces the amountof time and resources required to mount such an attack successfully.OpenSSH 2.5.1 and 2.5.2 include modifications which, while not completelyresolving this problem, reduce the risks by changing certain serverbehaviors to make passive analysis more difficult.
Solution
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 directly *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 ( for more info):
30293 - Where is sftp?
32977 - ssh unable to connect to certain servers using v2
6. RPMs required:
Red Hat Linux 7.0:
SRPMS:
alpha:
i386:
7. Verification:
MD5 sum Package Name
2249d15ecdca22482c03e8059dd8b31d 7.0/SRPMS/openssh-2.5.2p2-1.7.src.rpm
2c1705e525c6f07d611520374ddfe451 7.0/alpha/openssh-2.5.2p2-1.7.alpha.rpm
da69ea875b494a81b91caa65bad4b3b0 7.0/alpha/openssh-askpass-2.5.2p2-1.7.alpha.rpm
52f445b91c77c4aa1e63624aaca56a2a 7.0/alpha/openssh-askpass-gnome-2.5.2p2-1.7.alpha.rpm
997f39e0755a36d7633e6ddbde8b5e5d 7.0/alpha/openssh-clients-2.5.2p2-1.7.alpha.rpm
df2d8919c4c2ff8b0a57a4826c20e764 7.0/alpha/openssh-server-2.5.2p2-1.7.alpha.rpm
59fe7436fb6736b7948bfaec706c5628 7.0/i386/openssh-2.5.2p2-1.7.i386.rpm
f80b1952bd5caf65d0e724a26b421635 7.0/i386/openssh-askpass-2.5.2p2-1.7.i386.rpm
04723384928efd09e4f96ef142409135 7.0/i386/openssh-askpass-gnome-2.5.2p2-1.7.i386.rpm
8e387b44bd433e71c1caecb899a680f4 7.0/i386/openssh-clients-2.5.2p2-1.7.i386.rpm
99a219f6c0708203f4982a4998b4e401 7.0/i386/openssh-server-2.5.2p2-1.7.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
References
Passive Analysis of SSH (Secure Shell) Traffic http://marc.theaimsgroup.com/?l=openssh-unix-dev&m=98525792903526&w=2 http://marc.theaimsgroup.com/?l=openssh-unix-dev&m=98527416918430&w=2 Copyright(c) 2000, 2001 Red Hat, Inc. `
Package List
Topic
Topic
Updated openssh packages are now available for Red Hat Linux 7. These
packages reduce the amount of information a passive attacker can deduce
from observing an encrypted session.
Relevant Releases Architectures
Red Hat Linux 7.0 - alpha, i386
Bugs Fixed