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                   Red Hat, Inc. Security Advisory

Synopsis:               New lpr packages available
Advisory ID:            RHSA-2000:002-01
Issue date:             2000-01-07
Updated on:             2000-01-07
Keywords:               lpr lpd DNS sendmail
Cross references:
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1. Topic:

New lpr packages are available to fix two security problems
in lpd.

2. Relevant releases/architectures:

Red Hat Linux 4.x, all architectures
Red Hat Linux 5.x, all architectures
Red Hat Linux 6.x, all architectures

3. Problem description:

Two security vulnerabilities exist in the lpd
(line printer daemon) shipped with the lpr package.

First, authentication was not thorough enough. If a remote user
was able to control their own DNS so that their IP address resolved
to the hostname of the print server, access would be granted,
when it should not be.

Secondly, it was possible in the control file of a print job
to specify arguments to sendmail. By careful manipulation of
control and data files, this could cause sendmail to be executed
with a user-specified configuration file. This could lead
very easily to a root compromise.

It is recommended that all users of Red Hat Linux using the
lpr package (which is required to print) upgrade to the
fixed packages.

Thanks go to DilDog (dildog@l0pht.com) for noting the vulnerability.

4. Solution:

For each RPM for your particular architecture, run:
    rpm -Fvh 
where filename is the name of the RPM.

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

6. Obsoleted by:

7. Conflicts with:

8. RPMs required:

Red Hat Linux 6.x:

Intel:
  
Alpha:
  
Sparc:
  
Source packages:
  

Red Hat Linux 5.x:

Intel:
  
Alpha:
  
Sparc:
  
Source packages:
  

Red Hat Linux 4.x:

Intel:
  
Alpha:
  
Sparc:
  
Source packages:
  

9. Verification:

MD5 sum                           Package Name
--------------------------------------------------------------------------
78f2220331189e723eab944b53d0710e  i386/lpr-0.48-1.i386.rpm
3fcb89eb1a76741a505d3eeeddfa3674  alpha/lpr-0.48-1.alpha.rpm
441cfee04428ca215d98d9ce3d20bc4d  sparc/lpr-0.48-1.sparc.rpm
55c6a740b03569919ec08992257cad96  SRPMS/lpr-0.48-1.src.rpm

25ba4d2b49ff42403062d44f52f59947  i386/lpr-0.48-0.5.2.i386.rpm
aa13284c581601705fef727565ed407e  alpha/lpr-0.48-0.5.2.alpha.rpm
8d158ba104fadbfc84b5122f9564b2ed  sparc/lpr-0.48-0.5.2.sparc.rpm
3d7a10a086f5bd5aea739ec41d761881  SRPMS/lpr-0.48-0.5.2.src.rpm

a215955554df002e91e336abd310e3f1  i386/lpr-0.48-0.4.2.i386.rpm
a96363769e3815a5a5bb40084d8fac61  alpha/lpr-0.48-0.4.2.alpha.rpm
f56271b462851990238a24a5357c454f  sparc/lpr-0.48-0.4.2.sparc.rpm
48453e0c888e3d124a6b50fbb9a89be9  SRPMS/lpr-0.48-0.4.2.src.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 

10. References: