6280362 2001-03-27 15:24 -0500 /125 rader/ <bugzilla@REDHAT.COM>
Sänt av: joel@lysator.liu.se
Importerad: 2001-03-28 06:21 av Brevbäraren
Extern mottagare: BUGTRAQ@SECURITYFOCUS.COM
Externa svar till: bugzilla@REDHAT.COM
Mottagare: Bugtraq (import) <16171>
Ärende: [RHSA-2001:033-04] Updated openssh packages available
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From: bugzilla@REDHAT.COM
To: BUGTRAQ@SECURITYFOCUS.COM
Message-ID: <200103272024.f2RKOHx03215@porkchop.redhat.com>
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Red Hat, Inc. Red Hat Security Advisory
Synopsis: Updated openssh packages available
Advisory ID: RHSA-2001:033-04
Issue date: 2001-03-23
Updated on: 2001-03-27
Product: Red Hat Linux
Keywords: openssh passive analysis
Cross references:
Obsoletes: RHBA-2000-076 RHSA-2000-111
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1. 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.
2. Relevant releases/architectures:
Red Hat Linux 7.0 - alpha, i386
3. Problem description:
Weaknesses in the SSH protocols can be used by a passive attacker to
deduce information about passwords entered over an encrypted
connection. This information can be used to reduce the number of
possible solutions which need to be tested to perform a brute-force
attack. This reduces the amount of time and resources required to
mount such an attack successfully.
OpenSSH 2.5.1 and 2.5.2 include modifications which, while not
completely resolving this problem, reduce the risks by changing
certain server behaviors to make passive analysis more difficult.
4. 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 (http://bugzilla.redhat.com/bugzilla 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:
ftp://updates.redhat.com/7.0/SRPMS/openssh-2.5.2p2-1.7.src.rpm
alpha:
ftp://updates.redhat.com/7.0/alpha/openssh-2.5.2p2-1.7.alpha.rpm
ftp://updates.redhat.com/7.0/alpha/openssh-askpass-2.5.2p2-1.7.alpha.rpm
ftp://updates.redhat.com/7.0/alpha/openssh-askpass-gnome-2.5.2p2-1.7.alpha.rpm
ftp://updates.redhat.com/7.0/alpha/openssh-clients-2.5.2p2-1.7.alpha.rpm
ftp://updates.redhat.com/7.0/alpha/openssh-server-2.5.2p2-1.7.alpha.rpm
i386:
ftp://updates.redhat.com/7.0/i386/openssh-2.5.2p2-1.7.i386.rpm
ftp://updates.redhat.com/7.0/i386/openssh-askpass-2.5.2p2-1.7.i386.rpm
ftp://updates.redhat.com/7.0/i386/openssh-askpass-gnome-2.5.2p2-1.7.i386.rpm
ftp://updates.redhat.com/7.0/i386/openssh-clients-2.5.2p2-1.7.i386.rpm
ftp://updates.redhat.com/7.0/i386/openssh-server-2.5.2p2-1.7.i386.rpm
7. Verification:
MD5 sum Package Name
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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:
http://www.redhat.com/corp/contact.html
You can verify each package with the following command:
rpm --checksig <filename>
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 <filename>
8. References:
http://www.openwall.com/advisories/OW-003-ssh-traffic-analysis.txt
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.
(6280362) / <bugzilla@REDHAT.COM>/--------(Ombruten)