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Red Hat Security Advisory: Setuid bits are removed on dump to prevent exploit

Nov 02, 2000, 21:20 (0 Talkback[s])

Date: Thu, 2 Nov 2000 10:06 -0500
From: bugzilla@redhat.com
To: redhat-watch-list@redhat.com
Subject: [RHSA-2000:100-02] Setuid bits are removed on dump to prevent exploit


                   Red Hat, Inc. Security Advisory

Synopsis:          Setuid bits are removed on dump to prevent exploit
Advisory ID:       RHSA-2000:100-02
Issue date:        2000-11-01
Updated on:        2000-11-02
Product:           Red Hat Linux
Keywords:          setuid dump root exploit
Cross references:  N/A

1. Topic:

The Red Hat 7.0 dump is being released for Red Hat 6.x and Red Hat 5.x in order to remove root setuid bits to prevent a known dump exploit (#20111).

The new dump packages also include a fix for a buffer overflow (#9899)

2. Relevant releases/architectures:

Red Hat Linux 5.2 - i386, alpha, sparc
Red Hat Linux 6.2 - i386, alpha, sparc
Red Hat Linux 6.2EE - i386, alpha, sparc

3. Problem description:

Dump can be used to gain root access.

4. Solution:

For each RPM for your particular architecture, run:

rpm -Fvh [filename]

where filename is the name of the RPM.

5. Bug IDs fixed (http://bugzilla.redhat.com/bugzilla for more info):

9899 - Linux dump buffer overflow
20111 - RH6.2 dump SUID exploit (via RSH env. var)

6. RPMs required:

Red Hat Linux 5.2:

alpha:
ftp://updates.redhat.com/5.2/alpha/dump-0.4b19-5.5x.alpha.rpm
ftp://updates.redhat.com/5.2/alpha/dump-static-0.4b19-5.5x.alpha.rpm
ftp://updates.redhat.com/5.2/alpha/rmt-0.4b19-5.5x.alpha.rpm

sparc:
ftp://updates.redhat.com/5.2/sparc/dump-0.4b19-5.5x.sparc.rpm
ftp://updates.redhat.com/5.2/sparc/dump-static-0.4b19-5.5x.sparc.rpm
ftp://updates.redhat.com/5.2/sparc/rmt-0.4b19-5.5x.sparc.rpm

i386:
ftp://updates.redhat.com/5.2/i386/dump-0.4b19-5.5x.i386.rpm
ftp://updates.redhat.com/5.2/i386/dump-static-0.4b19-5.5x.i386.rpm
ftp://updates.redhat.com/5.2/i386/rmt-0.4b19-5.5x.i386.rpm

sources:
ftp://updates.redhat.com/5.2/SRPMS/dump-0.4b19-5.5x.src.rpm

Red Hat Linux 6.2:

alpha:
ftp://updates.redhat.com/6.2/alpha/dump-0.4b19-5.6x.alpha.rpm
ftp://updates.redhat.com/6.2/alpha/dump-static-0.4b19-5.6x.alpha.rpm
ftp://updates.redhat.com/6.2/alpha/rmt-0.4b19-5.6x.alpha.rpm

sparc:
ftp://updates.redhat.com/6.2/sparc/dump-0.4b19-5.6x.sparc.rpm
ftp://updates.redhat.com/6.2/sparc/dump-static-0.4b19-5.6x.sparc.rpm
ftp://updates.redhat.com/6.2/sparc/rmt-0.4b19-5.6x.sparc.rpm

i386:
ftp://updates.redhat.com/6.2/i386/dump-0.4b19-5.6x.i386.rpm
ftp://updates.redhat.com/6.2/i386/dump-static-0.4b19-5.6x.i386.rpm
ftp://updates.redhat.com/6.2/i386/rmt-0.4b19-5.6x.i386.rpm

sources:
ftp://updates.redhat.com/6.2/SRPMS/dump-0.4b19-5.6x.src.rpm

7. Verification:

MD5 sum                           Package Name

710a477813de5924b5aaca8ded33c3b2 5.2/SRPMS/dump-0.4b19-5.5x.src.rpm
496fcf5455218b085ee987c5148cb218 5.2/alpha/dump-0.4b19-5.5x.alpha.rpm
c8bec9ba7d4e8eb4bed2de555c6261a8 5.2/alpha/dump-static-0.4b19-5.5x.alpha.rpm
17b1956371260c4c7c86aa7e7098b70a 5.2/alpha/rmt-0.4b19-5.5x.alpha.rpm
3d7179c1541163652d42a0f3eba402c2 5.2/i386/dump-0.4b19-5.5x.i386.rpm
6ab9db49bf706b7228d952d7dffafd6a 5.2/i386/dump-static-0.4b19-5.5x.i386.rpm
3ca02060c0d8c5b2bfab68c9154ca65e 5.2/i386/rmt-0.4b19-5.5x.i386.rpm
80d7226a19922ddbb921c7cc619d68df 5.2/sparc/dump-0.4b19-5.5x.sparc.rpm
aedd02e6ebfc7703713ec34930b5cfd5 5.2/sparc/dump-static-0.4b19-5.5x.sparc.rpm
aaeaf1e04013e62e311f5fb7ccf4b6df 5.2/sparc/rmt-0.4b19-5.5x.sparc.rpm
48225b01757f79eecd50e20cc3746017 6.2/SRPMS/dump-0.4b19-5.6x.src.rpm
339d7bdc63a154a08ac05b2d59be299f 6.2/alpha/dump-0.4b19-5.6x.alpha.rpm
aa4eb8d7e446cdbaf10cec1d6beb2ea8 6.2/alpha/dump-static-0.4b19-5.6x.alpha.rpm
d70e961e5ce712df4b671fe7fa53cf0f 6.2/alpha/rmt-0.4b19-5.6x.alpha.rpm
62d35595f6b11c7a478d2f3608ebb8b3 6.2/i386/dump-0.4b19-5.6x.i386.rpm
86a7cd33b8c870f01a4fe3fc500a6af1 6.2/i386/dump-static-0.4b19-5.6x.i386.rpm
6f1831d60345791448f94f7e8276a47e 6.2/i386/rmt-0.4b19-5.6x.i386.rpm
f907fe91725a340c07f44d381eb4da70 6.2/sparc/dump-0.4b19-5.6x.sparc.rpm
daaf188d21fdfe8141f4e0dcfc8fa51e 6.2/sparc/dump-static-0.4b19-5.6x.sparc.rpm
930c7a447f5c197a73e619789a8ae18a 6.2/sparc/rmt-0.4b19-5.6x.sparc.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:

N/A

Copyright(c) 2000 Red Hat, Inc.