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                   Red Hat, Inc. Security Advisory

Synopsis:          Updated joe packages are available for Red Hat Linux 5.2, 6.x and 7
Advisory ID:       RHSA-2000:110-06
Issue date:        2000-11-17
Updated on:        2000-11-20
Product:           Red Hat Linux
Keywords:          joe DEADJOE symlink vulnerability
Cross references:  N/A
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1. Topic:

Updated joe packages are available for Red Hat Linux 5.2, 6.x and 7.

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 6.2EE - i386
Red Hat Linux 7.0 - i386

3. Problem description:

When exiting joe in a nonstandard way (such as a system crash, closing an
xterm, or a network connection going down), joe will unconditionally append
its open  buffers to the file "DEADJOE". This could be exploited by the
creation of DEADJOE symlinks in directories where root would normally use
joe.  In this way, joe could be used to append garbage to
potentially-sensitive files, resulting in a denial of service.

Users of Red Hat Linux 6.x and 5.2 should also note that joe's
configuration files have been moved from /usr/lib/joe to /etc/joe

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  ( for more info):

N/A

6. RPMs required:

Red Hat Linux 5.2:

alpha: 

sparc: 

i386: 

sources: 

Red Hat Linux 6.0:

sparc: 

i386: 

alpha: 

sources: 

Red Hat Linux 6.1:

alpha: 

sparc: 

i386: 

sources: 

Red Hat Linux 6.2:

alpha: 

sparc: 

i386: 

sources: 

Red Hat Linux 7.0:

i386: 

sources: 

7. Verification:

MD5 sum                           Package Name
--------------------------------------------------------------------------
7b78c81b253833ae849d162457d318dd  5.2/SRPMS/joe-2.8-42.52.src.rpm
0959bddd216c47426e5c335e6dbaa922  5.2/alpha/joe-2.8-42.52.alpha.rpm
d5dc1a23953544964c04ad1eaa9c1a26  5.2/i386/joe-2.8-42.52.i386.rpm
d5ce7e5469be6ff16373d4610c2b8fb3  5.2/sparc/joe-2.8-42.52.sparc.rpm
6eb2d2741296250f71667d5a1c1467fc  6.0/SRPMS/joe-2.8-42.62.src.rpm
c53a34db6539d412adc86493e17e9725  6.0/alpha/joe-2.8-42.62.alpha.rpm
d6afd50052ee0f5354a7398849d6c5b5  6.0/i386/joe-2.8-42.62.i386.rpm
0b1e58283c4f4d4c41c55948b0117f80  6.0/sparc/joe-2.8-42.62.sparc.rpm
6eb2d2741296250f71667d5a1c1467fc  6.1/SRPMS/joe-2.8-42.62.src.rpm
c53a34db6539d412adc86493e17e9725  6.1/alpha/joe-2.8-42.62.alpha.rpm
d6afd50052ee0f5354a7398849d6c5b5  6.1/i386/joe-2.8-42.62.i386.rpm
0b1e58283c4f4d4c41c55948b0117f80  6.1/sparc/joe-2.8-42.62.sparc.rpm
6eb2d2741296250f71667d5a1c1467fc  6.2/SRPMS/joe-2.8-42.62.src.rpm
c53a34db6539d412adc86493e17e9725  6.2/alpha/joe-2.8-42.62.alpha.rpm
d6afd50052ee0f5354a7398849d6c5b5  6.2/i386/joe-2.8-42.62.i386.rpm
0b1e58283c4f4d4c41c55948b0117f80  6.2/sparc/joe-2.8-42.62.sparc.rpm
67e2ddb6f4c903672782467684fbb7d3  7.0/SRPMS/joe-2.8-43.src.rpm
1578b0e184b76b23d2a30b101f1665d4  7.0/i386/joe-2.8-43.i386.rpm

These packages are GPG signed by Red Hat, Inc. for security.  Our key
is available at:
     
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:

N/A


Copyright(c) 2000 Red Hat, Inc.