Date: Mon, 11 Sep 2000 14:57:00 -0400
From: bugzilla@REDHAT.COM
To: BUGTRAQ@SECURITYFOCUS.COM
Subject: [RHSA-2000:059-02] Updated mgetty packages are now
available.
Red Hat, Inc. Security Advisory
Synopsis: Updated mgetty packages are now available.
Advisory ID: RHSA-2000:059-02
Issue date: 2000-09-07
Updated on: 2000-09-11
Product: Red Hat Linux
Keywords: N/A
Cross references: N/A
1. Topic:
The mgetty-sendfax package contains a vulnerability which allows
any user with access to the /var/tmp directory to destroy any file
on any mounted filesystem.
2. Relevant releases/architectures:
Red Hat Linux 5.2 – i386, alpha, sparc
Red Hat Linux 6.0 – i386, alpha, sparc
Red Hat Linux 6.1 – i386, alpha, sparc
Red Hat Linux 6.2 – i386, alpha, sparc
Red Hat Linux 6.2E – i386, alpha, sparc
3. Problem description:
The faxrunq and faxrunqd commands supplied with the
mgetty-sendfax package use a file named
/var/spool/fax/outgoing/.lastrun to keep track of the date and time
when the faxrunq command was last run. /var/tmp is a world-writable
directory, and no check is made to ensure that .lastrun is not a
symbolic link to another file. A malicious user can create a
symbolic link named /var/spool/fax/outgoing/.lastrun which points
to any file on a mounted filesystem, and that file’s contents will
be destroyed the next time faxrunq is run.
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):
11874 – Mgetty packages default config is a security threat
17178 – one more security problem with mgetty
17179 – security problem with mgetty
6. RPMs required:
Red Hat Linux 5.2:
sparc:
ftp://updates.redhat.com/5.2/sparc/mgetty-voice-1.1.22-1.5.x.sparc.rpm
ftp://updates.redhat.com/5.2/sparc/mgetty-viewfax-1.1.22-1.5.x.sparc.rpm
ftp://updates.redhat.com/5.2/sparc/mgetty-sendfax-1.1.22-1.5.x.sparc.rpm
ftp://updates.redhat.com/5.2/sparc/mgetty-1.1.22-1.5.x.sparc.rpm
alpha:
ftp://updates.redhat.com/5.2/alpha/mgetty-voice-1.1.22-1.5.x.alpha.rpm
ftp://updates.redhat.com/5.2/alpha/mgetty-viewfax-1.1.22-1.5.x.alpha.rpm
ftp://updates.redhat.com/5.2/alpha/mgetty-sendfax-1.1.22-1.5.x.alpha.rpm
ftp://updates.redhat.com/5.2/alpha/mgetty-1.1.22-1.5.x.alpha.rpm
i386:
ftp://updates.redhat.com/5.2/i386/mgetty-voice-1.1.22-1.5.x.i386.rpm
ftp://updates.redhat.com/5.2/i386/mgetty-viewfax-1.1.22-1.5.x.i386.rpm
ftp://updates.redhat.com/5.2/i386/mgetty-sendfax-1.1.22-1.5.x.i386.rpm
ftp://updates.redhat.com/5.2/i386/mgetty-1.1.22-1.5.x.i386.rpm
sources:
ftp://updates.redhat.com/5.2/SRPMS/mgetty-1.1.22-1.5.x.src.rpm
Red Hat Linux 6.0, 6.1, and 6.2:
sparc:
ftp://updates.redhat.com/6.2/sparc/mgetty-voice-1.1.22-1.6.x.sparc.rpm
ftp://updates.redhat.com/6.2/sparc/mgetty-viewfax-1.1.22-1.6.x.sparc.rpm
ftp://updates.redhat.com/6.2/sparc/mgetty-sendfax-1.1.22-1.6.x.sparc.rpm
ftp://updates.redhat.com/6.2/sparc/mgetty-1.1.22-1.6.x.sparc.rpm
i386:
ftp://updates.redhat.com/6.2/i386/mgetty-voice-1.1.22-1.6.x.i386.rpm
ftp://updates.redhat.com/6.2/i386/mgetty-viewfax-1.1.22-1.6.x.i386.rpm
ftp://updates.redhat.com/6.2/i386/mgetty-sendfax-1.1.22-1.6.x.i386.rpm
ftp://updates.redhat.com/6.2/i386/mgetty-1.1.22-1.6.x.i386.rpm
alpha:
ftp://updates.redhat.com/6.2/alpha/mgetty-voice-1.1.22-1.6.x.alpha.rpm
ftp://updates.redhat.com/6.2/alpha/mgetty-viewfax-1.1.22-1.6.x.alpha.rpm
ftp://updates.redhat.com/6.2/alpha/mgetty-sendfax-1.1.22-1.6.x.alpha.rpm
ftp://updates.redhat.com/6.2/alpha/mgetty-1.1.22-1.6.x.alpha.rpm
sources:
ftp://updates.redhat.com/6.2/SRPMS/mgetty-1.1.22-1.6.x.src.rpm
7. Verification:
MD5 sum Package Name
b27b3fda4c0d0e7ac7b74353c4f1f145 5.2/SRPMS/mgetty-1.1.22-1.5.x.src.rpm b652205f79715212bef4c98f0d624f6d 5.2/alpha/mgetty-1.1.22-1.5.x.alpha.rpm dcc1ae6fa8cf601c3418d0affbf91039 5.2/alpha/mgetty-sendfax-1.1.22-1.5.x.alpha.rpm fe85f4fe5367d619b160987e912b7e24 5.2/alpha/mgetty-viewfax-1.1.22-1.5.x.alpha.rpm c2d5a314915ade00c98ba3fe4ce5712b 5.2/alpha/mgetty-voice-1.1.22-1.5.x.alpha.rpm f2fb0d8bf7f3b2140a3e21170399bc7c 5.2/i386/mgetty-1.1.22-1.5.x.i386.rpm e3773830446a4fba7555d70732a2938d 5.2/i386/mgetty-sendfax-1.1.22-1.5.x.i386.rpm 245f0b0f00e1687401edd65db86cd7a9 5.2/i386/mgetty-viewfax-1.1.22-1.5.x.i386.rpm f49678f5fc10297473b9415f7148fe94 5.2/i386/mgetty-voice-1.1.22-1.5.x.i386.rpm 45ff2fa65ed3411734a58162880ca19f 5.2/sparc/mgetty-1.1.22-1.5.x.sparc.rpm 6b69116697c9636a9d3fc59f209d74ff 5.2/sparc/mgetty-sendfax-1.1.22-1.5.x.sparc.rpm 9db43716f48517d4bd6cf22253e975f1 5.2/sparc/mgetty-viewfax-1.1.22-1.5.x.sparc.rpm 1fabca053ad9a520d3065c00d31bb9d9 5.2/sparc/mgetty-voice-1.1.22-1.5.x.sparc.rpm 7b50848c4ef1d27d2c40e9f5e2c74f75 6.2/SRPMS/mgetty-1.1.22-1.6.x.src.rpm 47d1b922a94ffe984a19285f2296907c 6.2/alpha/mgetty-1.1.22-1.6.x.alpha.rpm 52c43e4d8195ee483459c0b273f064f4 6.2/alpha/mgetty-sendfax-1.1.22-1.6.x.alpha.rpm 3927d2ead5ef89b93f3799190af12535 6.2/alpha/mgetty-viewfax-1.1.22-1.6.x.alpha.rpm 4eb7013dee45011c6c7958be40e000fe 6.2/alpha/mgetty-voice-1.1.22-1.6.x.alpha.rpm bd6ee4b93aa742d6cbc92bbae031c345 6.2/i386/mgetty-1.1.22-1.6.x.i386.rpm 3539dc2f5c5bef8819a8bc781e0d3405 6.2/i386/mgetty-sendfax-1.1.22-1.6.x.i386.rpm 3a17e82b398d69c294952773a098c105 6.2/i386/mgetty-viewfax-1.1.22-1.6.x.i386.rpm e61f3413ce93cd30c41eeb29caef2177 6.2/i386/mgetty-voice-1.1.22-1.6.x.i386.rpm 03d15f11dafe000ad55c3290974ae670 6.2/sparc/mgetty-1.1.22-1.6.x.sparc.rpm 7ae49a988c81a450cabc7f2ca6d24a76 6.2/sparc/mgetty-sendfax-1.1.22-1.6.x.sparc.rpm b903bc9f9531ed015248e7e000f58884 6.2/sparc/mgetty-viewfax-1.1.22-1.6.x.sparc.rpm 985ee71161bb9bb1c73325115e0150f3 6.2/sparc/mgetty-voice-1.1.22-1.6.x.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
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
8. References:
http://www.securityfocus.com/bid/1612
Thanks also go to Stan Bubrouski, Gert Doering, and mal@mail1.nai.net.
Copyright(c) 2000 Red Hat, Inc.