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TUCoPS :: Linux :: Red Hat/Fedora :: m-056.txt

Red Hat uuxqt Vulnerability (CIAC M-056)




             __________________________________________________________

                       The U.S. Department of Energy
                     Computer Incident Advisory Center
                           ___  __ __    _     ___
                          /       |     /_\   /
                          \___  __|__  /   \  \___
             __________________________________________________________

                             INFORMATION BULLETIN

                         Red Hat "uuxqt" Vulnerability
                           [Red Hat RHSA-2001:165-15]

March 18, 2002 18:00 GMT                                          Number M-056
______________________________________________________________________________
PROBLEM:       The uuxqt, in the Taylor UUCP package, does not properly remove 
               dangerous long options. 
PLATFORM:      Red Hat Linux 6.2 - alpha, i386, sparc 
               Red Hat Linux 7.0 - alpha, i386 
               Red Hat Linux 7.1 - alpha, i386, ia64 
               Red Hat Linux 7.2 - i386, ia64, s390 
DAMAGE:        These long options allow local users to gain uid and gid uucp 
               privileges, thereby allowing execution of arbitrary code. 
SOLUTION:      Apply the appropriate RPMs. 
______________________________________________________________________________
VULNERABILITY  The risk is LOW. A local user account is necessary to exploit 
ASSESSMENT:    this vulnerability. 
______________________________________________________________________________
LINKS: 
 CIAC BULLETIN:      http://www.ciac.org/ciac/bulletins/m-056.shtml 
 ORIGINAL BULLETIN:  https://www.redhat.com/support/errata/RHSA-2001-165.html 
______________________________________________________________________________


[***** Start Red Hat RHSA-2001:165-15 *****]

---------------------------------------------------------------------
 
Synopsis: The uuxqt utility can be used to execute arbitrary commands 
as 
          uucp.uucp  

---------------------------------------------------------------------
  
Advisory ID: RHSA-2001:165-15  

---------------------------------------------------------------------
  
Issue Date: 2001-12-06  

---------------------------------------------------------------------
  
Updated On: 2002-03-12  

---------------------------------------------------------------------
  
Product: Red Hat Linux  

---------------------------------------------------------------------
  
Keywords: uucp exploit uuxqt  

---------------------------------------------------------------------
  
Cross References:  

---------------------------------------------------------------------
  
Obsoletes:  

---------------------------------------------------------------------
  
1. Topic:

This is a re-release of a prior uucp exploit errata which also 
prevents unique substrings being used with long options.

uuxqt, in the Taylor UUCP package, does not properly remove 
dangerous long options. These long options allow local users to 
gain uid and gid uucp privileges by calling uux and specifying 
an alternate configuration file with the --config option. 

2. Problem description:

Please note, Red Hat Linux 7.2 is vulnerable to this bug.

Additionally, Red Hat Linux 7.2 uses a different locking scheme 
than prior versions and the 7.2 packages should not be applied to 
Red Hat Linux 7.0 or 7.1 systems. Use the relevant packages from 
this errata instead.

Conversely, the 7.1 packages from this errata should not be 
applied to a Red Hat Linux 7.2 system.

The Common Vulnerabilities and Exposures project (cve.mitre.org) 
has assigned the name CAN-2001-0873 to this issue. 

3. Bug IDs fixed: (see bugzilla for more information)

4. Relevant releases/architectures:

Red Hat Linux 6.2 - alpha, i386, sparc 
Red Hat Linux 7.0 - alpha, i386 
Red Hat Linux 7.1 - alpha, i386, ia64 
Red Hat Linux 7.2 - i386, ia64, s390

5. RPMs required:

Red Hat Linux 6.2:

SRPMS:
ftp://updates.redhat.com/6.2/en/os/SRPMS/uucp-1.06.1-33.6.2.src.rpm

alpha:
ftp://updates.redhat.com/6.2/en/os/alpha/uucp-1.06.1-33.6.2.alpha.rpm

i386:
ftp://updates.redhat.com/6.2/en/os/i386/uucp-1.06.1-33.6.2.i386.rpm

sparc:
ftp://updates.redhat.com/6.2/en/os/sparc/uucp-1.06.1-33.6.2.sparc.rpm

Red Hat Linux 7.0:

SRPMS:
ftp://updates.redhat.com/7.0/en/os/SRPMS/uucp-1.06.1-33.7.1.src.rpm

alpha:
ftp://updates.redhat.com/7.0/en/os/alpha/uucp-1.06.1-33.7.1.alpha.rpm

i386:
ftp://updates.redhat.com/7.0/en/os/i386/uucp-1.06.1-33.7.1.i386.rpm

Red Hat Linux 7.1:

SRPMS:
ftp://updates.redhat.com/7.1/en/os/SRPMS/uucp-1.06.1-33.7.1.src.rpm

alpha:
ftp://updates.redhat.com/7.1/en/os/alpha/uucp-1.06.1-33.7.1.alpha.rpm

i386:
ftp://updates.redhat.com/7.1/en/os/i386/uucp-1.06.1-33.7.1.i386.rpm

ia64:
ftp://updates.redhat.com/7.1/en/os/ia64/uucp-1.06.1-33.7.1.ia64.rpm

Red Hat Linux 7.2:

SRPMS:
ftp://updates.redhat.com/7.2/en/os/SRPMS/uucp-1.06.1-33.7.2.src.rpm

i386:
ftp://updates.redhat.com/7.2/en/os/i386/uucp-1.06.1-33.7.2.i386.rpm

ia64:
ftp://updates.redhat.com/7.2/en/os/ia64/uucp-1.06.1-33.7.2.ia64.rpm

s390:
ftp://updates.redhat.com/7.2/en/os/s390/uucp-1.06.1-33.7.2.s390.rpm

6. Solution:

Before applying this update, make sure all previously released 
errata relevant to your system have been applied.

To update all RPMs for your particular architecture, run:

rpm -Fvh [filenames]

where [filenames] is a list of the RPMs you wish to upgrade. Only 
those RPMs which are currently installed will be updated. Those 
RPMs which are not installed but included in the list will not be 
updated. Note that you can also use wildcards (*.rpm) if your 
current directory *only* contains the desired RPMs.

Please note that this update is also available via Red Hat Network. 
Many people find this an easier way to apply updates. To use Red 
Hat Network, launch the Red Hat Update Agent with the following 
command:

up2date

This will start an interactive process that will result in the 
appropriate RPMs being upgraded on your system. 

7. Verification:

MD5 sum                           Package Name
-------------------------------------------------------------------------
5616d9044da2635af9601750d2a2f315 6.2/en/os/SRPMS/uucp-1.06.1-33.6.2.src.rpm
024bbec5d7fcaedc692320626e16ae18 6.2/en/os/alpha/uucp-1.06.1-33.6.2.alpha.rpm
6b2ca4965e4c4d10971534c10d578c3a 6.2/en/os/i386/uucp-1.06.1-33.6.2.i386.rpm
8ff8deb7002311232e4194988ed5ea43 6.2/en/os/sparc/uucp-1.06.1-33.6.2.sparc.rpm
f0d7a8cb43a9556cace1696065477d9b 7.0/en/os/SRPMS/uucp-1.06.1-33.7.1.src.rpm
16bf2ac3eab8ca9dbc2ecd56c80c615e 7.0/en/os/alpha/uucp-1.06.1-33.7.1.alpha.rpm
771ac34942694b1875d28d860e7847a1 7.0/en/os/i386/uucp-1.06.1-33.7.1.i386.rpm
f0d7a8cb43a9556cace1696065477d9b 7.1/en/os/SRPMS/uucp-1.06.1-33.7.1.src.rpm
16bf2ac3eab8ca9dbc2ecd56c80c615e 7.1/en/os/alpha/uucp-1.06.1-33.7.1.alpha.rpm
771ac34942694b1875d28d860e7847a1 7.1/en/os/i386/uucp-1.06.1-33.7.1.i386.rpm
1b1afeb93da48e815ba0a3c7c3a1dd3f 7.1/en/os/ia64/uucp-1.06.1-33.7.1.ia64.rpm
e8d64d249b2762322c4b1a2919063acc 7.2/en/os/SRPMS/uucp-1.06.1-33.7.2.src.rpm
624e3e88f520b3cf046985fd597c3834 7.2/en/os/i386/uucp-1.06.1-33.7.2.i386.rpm
5bda3bdbef085f3323dc7a91d3850f20 7.2/en/os/ia64/uucp-1.06.1-33.7.2.ia64.rpm
a911e543662e2e681855550245fa8234 7.2/en/os/s390/uucp-1.06.1-33.7.2.s390.rpm

These packages are GPG signed by Red Hat, Inc. for security. Our key 
is available at: http://www.redhat.com/about/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

Note that you need RPM >= 3.0 to check GnuPG keys. 

8. References:

http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2001-0873
http://www.securityfocus.com/bid/3312 


[***** End Red Hat RHSA-2001:165-15 *****]

_______________________________________________________________________________

CIAC wishes to acknowledge the contributions of Red Hat, Inc. for the 
information contained in this bulletin.
_______________________________________________________________________________


CIAC, the Computer Incident Advisory Center, is the computer
security incident response team for the U.S. Department of Energy
(DOE) and the emergency backup response team for the National
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