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The U.S. Department of Energy
Computer Incident Advisory Center
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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
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Updated On: 2002-03-12
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Product: Red Hat Linux
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Keywords: uucp exploit uuxqt
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Cross References:
---------------------------------------------------------------------
Obsoletes:
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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
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