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TurboLinux Security Announcement: Package: dhcp-2.0 and earlier

Jul 28, 2000, 23:59 (0 Talkback[s])
(Other stories by Joe Little)

Date: Fri, 28 Jul 2000 16:06:34 -0700 (PDT)
From: Joe Little jlittle@turbolinux.com
To: tl-security-announce@turbolinux.com
Subject: [TL-Security-Announce] dhcp TLSA2000015-1


                        TurboLinux Security Announcement

        Package: dhcp-2.0 and earlier
        Date: Wednesday July 19 17:00 PDT 2000

        Affected TurboLinux versions: 6.0.5 and earlier
        Vulnerability Type: remote root exploit
        TurboLinux Advisory ID#:  TLSA2000015-1
        Credits: OpenBSD team / mellon@NOMINUM.COM

A security hole was discovered in the package mentioned above. Please update the package in your installation as soon as possible or disable the service.


1. Problem Summary

Current and previous version of the DHCP client is vulnerable to malicious DHCP servers. The client can execute arbitrary commands given to it in responses from a DHCP server.

2. Impact

A maliciously placed DHCP can answer to any local DHCP client, thus providing an avenue to remotely exploit root privileges on the client.

3. Solution

Please upgrade both the client and server packages to match the new revision

Update the packages from our ftp server by running the following command:

rpm -Fv ftp_path_to_filename

Where ftp_path_to_filename is the following:

ftp://ftp.turbolinux.com/pub/updates/6.0/security/dhcp-2.0pl3-4.i386.rpm
ftp://ftp.turbolinux.com/pub/updates/6.0/security/dhcp-client-2.0pl3-4.i386.rpm

The source RPM can be downloaded here:

ftp://ftp.turbolinux.com/pub/updates/6.0/SRPMS/dhcp-2.0pl3-4.i386.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 checksum of the update before you install:

  MD5 sum                               Package Name

d6b80f8168a2ea8ec13f25a28d14943e dhcp-2.0pl3-4.i386.rpm
66085982778f6820a118abff4e336b2e dhcp-client-2.0pl3-4.i386.rpm
044a8281b6ebf8755aebf38e4a077087 dhcp-2.0pl3-4.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:

rpm --checksig --nogpg 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 TL6.0 Workstation
and Server security updates
ftp://ftp.turbolinux.com/pub/updates/4.0/security/ for TL4.0 Workstation
and Server security updates

Our webpage for security announcements:

http://www.turbolinux.com/security

If you want to report vulnerabilities, please contact:

rt-security@turbolinux.com


Subscribe to the TurboLinux Security Mailing lists:

TL-security - A moderated list for discussing security issues in 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