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From: TurboLinux Security Team <security@www1.turbolinux.com>
To: tl-security-announce@www1.turbolinux.com
Subject: [TL-Security-Announce] TLSA2001021 openssh-2.5.2p2-2
Date: Tue, 22 May 2001 19:24:08 -0700 (PDT)
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_____________________________________________________________________________________________
Turbolinux Security Announcement
Package: openssh
Vulnerable Packages: All Turbolinux versions prior to 2.5.2p2-2
Date: 05/17/2001 5:00 PDT
Affected Turbolinux platforms: TL Server 6.5
Turbolinux Advisory ID#: TLSA2001021
Credits: Solar Designer < solar@openwall.com >
Dug Song <dugsong@monkey.org>
Markus Friedl and Theo de Raadt of OpenSSH
Simon Tatham (PuTTY), and Niels Mller (LSH)
Reference: http://www.securityfocus.com/archive/1/169840
_____________________________________________________________________________________________
Several security holes were discovered in the package mentioned above.
Please update the packages in your installation as soon as possible.
_____________________________________________________________________________________________
1. Problem Summary
Several weaknesses in the SSH protocol have been detected. To capitalize on them, an
attacker must have the means to sniff, or monitor, network traffic between one or more
SSH clients and servers. Exploiting these weaknesses would enable an attacker to determine
passwords and shell commands more quickly during passive monitoring of password authenti-
cation and interactive ssh sessions.
The weaknesses in the SSH protocol include revealing an approximate, or, in the case
of SSH1, an exact length of a password, or shell command. It is also possible to gather
timing information, which can expose the likelihood of possible characters in each posi-
tion of a password. Using compression in an attempt to "randomize" the length of pass-
words does not help much since the size of the compressed data packets depends on the con-
tents of the packets.
2. Solution
Update the packages from our ftp server by using the following command:
rpm -Uvh ftp_path_to_filename
Where ftp_path_to_filename is the following:
ftp://ftp.turbolinux.com/pub/updates/6.0/security/openssh-2.5.2p2-2.i386.rpm
ftp://ftp.turbolinux.com/pub/updates/6.0/security/openssh-askpass-2.5.2p2-2.i386.rpm
ftp://ftp.turbolinux.com/pub/updates/6.0/security/openssh-askpass-gnome-2.5.2p2-2.i386.rpm
ftp://ftp.turbolinux.com/pub/updates/6.0/security/openssh-clients-2.5.2p2-2.i386.rpm
ftp://ftp.turbolinux.com/pub/updates/6.0/security/openssh-server-2.5.2p2-2.i386.rpm
The source RPM can be downloaded here:
ftp://ftp.turbolinux.com/pub/updates/6.0/SRPMS/openssh-2.5.2p2-2.src.rpm
**Note: You must rebuild and install the RPM if you choose to download
and install the SRPM. Simply installing the SRPM alone WILL NOT CLOSE
THE SECURITY HOLE.
Please verify the MD5 checksums of the updates before you install:
MD5 sum Package Name
- ---------------------------------------------------------------------------------------------
16212b406435bb3bfa3ad157bc27e94a openssh-2.5.2p2-2.i386.rpm
f3f499f9e9a052bdd2511ed0d28bb89a openssh-askpass-2.5.2p2-2.i386.rpm
3d348dffe8c985fac2dbc5e03a58cf00 openssh-askpass-gnome-2.5.2p2-2.i386.rpm
cc59641605ac79ed24f51ebc0dde1325 openssh-clients-2.5.2p2-2.i386.rpm
3682d87243e2fbe823cf9c892bf6cf21 openssh-server-2.5.2p2-2.i386.rpm
f57ddc14e022638fd76bc76b17653291 openssh-2.5.2p2-2.src.rpm
_____________________________________________________________________________________________
These packages are GPG signed by Turbolinux for security. Our key
is available here:
http://www.turbolinux.com/security/tlgpgkey.asc
To verify a package, use the following command:
rpm --checksig name_of_rpm
To examine only the md5sum, use the following command:
md5sum name_of_rpm
**Note: Checking GPG keys requires RPM 3.0 or higher.
_____________________________________________________________________________________________
You can find more updates on our ftp server:
ftp://ftp.turbolinux.com/pub/updates/6.0/security/
for TL6.x Workstation and Server security updates
Our webpage for security announcements:
http://www.turbolinux.com/security
If you want to report vulnerabilities, please contact:
security@turbolinux.com
______________________________________________________________________________________________
Subscribe to the Turbolinux Security Mailing lists:
TL-security - A moderated list for discussing security issues
Turbolinux products.
Subscribe at http://www.turbolinux.com/mailman/listinfo/tl-security
TL-security-announce - An announce-only mailing list for security
updates and alerts. Subscribe at:
http://www.turbolinux.com/mailman/listinfo/tl-security-announce
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