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===========================================================================
             AUSCERT External Security Bulletin Redistribution

            ESB-2002.123 -- Debian Security Advisory DSA 119-1
                              ssh channel bug
                               11 March 2002

===========================================================================

        AusCERT Security Bulletin Summary
        ---------------------------------

Product:                OpenSSH versions 2.0 through 3.0.2
Vendor:                 Debian
Operating System:       Debian unstable and testing archives
                        Linux
                        UNIX
Impact:                 Root Compromise
                        Execute Arbitrary Code/Commands
Access Required:        Remote

Ref:                    ESB-2002.117
                        ESB-2002.118
                        ESB-2002.121

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Debian Security Advisory                                 security@debian.org
http://www.debian.org/security/                                Michael Stone
March 7, 2002
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Package: openssh
Vulnerability: local root exploit, remote client exploit
Debian-specific: no

Joost Pol <joost@pine.nl> reports that OpenSSH versions 2.0 through 3.0.2
have an off-by-one bug in the channel allocation code. This vulnerability
can be exploited by authenticated users to gain root privilege or by a
malicious server exploiting a client with this bug.

Since Debian 2.2 (potato) shipped with OpenSSH (the "ssh" package)
version 1.2.3, it is not vulnerable to this exploit. No fix is required
for Debian 2.2 (potato).

The Debian unstable and testing archives do include a more recent OpenSSH
(ssh) package. If you are running these pre-release distributions you
should ensure that you are running version 3.0.2p1-8, a patched version
which was added to the unstable archive today, or a later version.

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For apt-get: deb http://security.debian.org/ stable/updates main
For dpkg-ftp: ftp://security.debian.org/debian-security dists/stable/updates/main
Mailing list: debian-security-announce@lists.debian.org

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