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RedHat: kerberos vulnerability Print E-mail
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Posted by LinuxSecurity.com Team   
RedHat Linux These updates close a potential vulnerability present in thegssapi-aware ftpd included in the krb5-workstation package.

---------------------------------------------------------------------
                   Red Hat, Inc. Red Hat Security Advisory

Synopsis:          Updated Kerberos 5 packages available
Advisory ID:       RHSA-2001:060-04
Issue date:        2001-04-26
Updated on:        2001-05-16
Product:           Red Hat Linux
Keywords:          kerberos ftpd glob
Cross references:  
Obsoletes:         RHSA-2001:025
---------------------------------------------------------------------

1. Topic:

Updated Kerberos 5 packages are now available for Red Hat Linux 6.2, 7,
and 7.1.  These updates close a potential vulnerability present in the
gssapi-aware ftpd included in the krb5-workstation package.

2. Relevant releases/architectures:

Red Hat Linux 6.2 - alpha, i386, sparc

Red Hat Linux 7.0 - alpha, i386

Red Hat Linux 7.1 - i386

3. Problem description:

By use of a carefully-crafted authentication request, a malicious client
could exploit a vulnerability made possible by a missing bounds check.  A
malicious client could also overflow the buffer space used by the server
for performing globbing operations.

4. 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.

5. Bug IDs fixed  (http://bugzilla.Red Hat.com/bugzilla for more info):

34372 - krb5-server-1.2.2-4.alpha.rpm i386 compatibility
35978 - gssftp can be segfaulted remotely, possibly exploitable

6. RPMs required:

Red Hat Linux 6.2:

SRPMS: 
ftp://updates.Red Hat.com/6.2/en/os/SRPMS/krb5-1.1.1-27.src.rpm

alpha: 
ftp://updates.Red Hat.com/6.2/en/os/alpha/krb5-configs-1.1.1-27.alpha.rpm 
ftp://updates.Red Hat.com/6.2/en/os/alpha/krb5-devel-1.1.1-27.alpha.rpm 
ftp://updates.Red Hat.com/6.2/en/os/alpha/krb5-libs-1.1.1-27.alpha.rpm 
ftp://updates.Red Hat.com/6.2/en/os/alpha/krb5-server-1.1.1-27.alpha.rpm 
ftp://updates.Red Hat.com/6.2/en/os/alpha/krb5-workstation-1.1.1-27.alpha.rpm

i386: 
ftp://updates.Red Hat.com/6.2/en/os/i386/krb5-configs-1.1.1-27.i386.rpm 
ftp://updates.Red Hat.com/6.2/en/os/i386/krb5-devel-1.1.1-27.i386.rpm 
ftp://updates.Red Hat.com/6.2/en/os/i386/krb5-libs-1.1.1-27.i386.rpm 
ftp://updates.Red Hat.com/6.2/en/os/i386/krb5-server-1.1.1-27.i386.rpm 
ftp://updates.Red Hat.com/6.2/en/os/i386/krb5-workstation-1.1.1-27.i386.rpm

sparc: 
ftp://updates.Red Hat.com/6.2/en/os/sparc/krb5-configs-1.1.1-27.sparc.rpm 
ftp://updates.Red Hat.com/6.2/en/os/sparc/krb5-devel-1.1.1-27.sparc.rpm 
ftp://updates.Red Hat.com/6.2/en/os/sparc/krb5-libs-1.1.1-27.sparc.rpm 
ftp://updates.Red Hat.com/6.2/en/os/sparc/krb5-server-1.1.1-27.sparc.rpm 
ftp://updates.Red Hat.com/6.2/en/os/sparc/krb5-workstation-1.1.1-27.sparc.rpm

Red Hat Linux 7.0:

SRPMS: 
ftp://updates.Red Hat.com/7.0/en/os/SRPMS/krb5-1.2.2-5.src.rpm

alpha: 
ftp://updates.Red Hat.com/7.0/en/os/alpha/krb5-devel-1.2.2-5.alpha.rpm 
ftp://updates.Red Hat.com/7.0/en/os/alpha/krb5-libs-1.2.2-5.alpha.rpm 
ftp://updates.Red Hat.com/7.0/en/os/alpha/krb5-server-1.2.2-5.alpha.rpm 
ftp://updates.Red Hat.com/7.0/en/os/alpha/krb5-workstation-1.2.2-5.alpha.rpm

i386: 
ftp://updates.Red Hat.com/7.0/en/os/i386/krb5-devel-1.2.2-5.i386.rpm 
ftp://updates.Red Hat.com/7.0/en/os/i386/krb5-libs-1.2.2-5.i386.rpm 
ftp://updates.Red Hat.com/7.0/en/os/i386/krb5-server-1.2.2-5.i386.rpm 
ftp://updates.Red Hat.com/7.0/en/os/i386/krb5-workstation-1.2.2-5.i386.rpm

Red Hat Linux 7.1:

SRPMS: 
ftp://updates.Red Hat.com/7.1/en/os/SRPMS/krb5-1.2.2-5.src.rpm

i386: 
ftp://updates.Red Hat.com/7.1/en/os/i386/krb5-devel-1.2.2-5.i386.rpm 
ftp://updates.Red Hat.com/7.1/en/os/i386/krb5-libs-1.2.2-5.i386.rpm 
ftp://updates.Red Hat.com/7.1/en/os/i386/krb5-server-1.2.2-5.i386.rpm 
ftp://updates.Red Hat.com/7.1/en/os/i386/krb5-workstation-1.2.2-5.i386.rpm



7. Verification:

MD5 sum                           Package Name
--------------------------------------------------------------------------
6ce2742e193047a719701d83b7178c59 6.2/en/os/SRPMS/krb5-1.1.1-27.src.rpm
f21e8e6beb5a91ebca4b00af0d1daf10 6.2/en/os/alpha/krb5-configs-1.1.1-27.alpha.rpm
1b2fd96e0f9d584b8a7ab16ff8d37b7b 6.2/en/os/alpha/krb5-devel-1.1.1-27.alpha.rpm
ab736f348078aee145f243f74a964be7 6.2/en/os/alpha/krb5-libs-1.1.1-27.alpha.rpm
c5fa26e257ad18d1feb917f78d4af0ad 6.2/en/os/alpha/krb5-server-1.1.1-27.alpha.rpm
01370ea541a8e521d1729649c52dddb3 6.2/en/os/alpha/krb5-workstation-1.1.1-27.alpha.rpm
65b68eaf07eb52ac3bf2c6a488843589 6.2/en/os/i386/krb5-configs-1.1.1-27.i386.rpm
c50eaabded279e17ca281e80a21a0b0e 6.2/en/os/i386/krb5-devel-1.1.1-27.i386.rpm
49696baafd5cdcd404992bb334067974 6.2/en/os/i386/krb5-libs-1.1.1-27.i386.rpm
e8421683d01ac72ddc7142a6fee34889 6.2/en/os/i386/krb5-server-1.1.1-27.i386.rpm
21b8178fa4ef08ed1863d14b6569d858 6.2/en/os/i386/krb5-workstation-1.1.1-27.i386.rpm
7914bb3f4a9eafbf056bff8b2da51654 6.2/en/os/sparc/krb5-configs-1.1.1-27.sparc.rpm
d11e49281aeb3b1dee8065b10fbaf2c1 6.2/en/os/sparc/krb5-devel-1.1.1-27.sparc.rpm
d03ce70b4a812159c7fcc1a805986484 6.2/en/os/sparc/krb5-libs-1.1.1-27.sparc.rpm
b4bcf1b7499e606993b64b4188eb7a39 6.2/en/os/sparc/krb5-server-1.1.1-27.sparc.rpm
b31a053948b7e02ab3ffa1d6d0a7bd36 6.2/en/os/sparc/krb5-workstation-1.1.1-27.sparc.rpm
a304c1e0aafb594f6831795715ed854a 7.0/en/os/SRPMS/krb5-1.2.2-5.src.rpm
2310d383bc594c3487b479ed016bf017 7.0/en/os/alpha/krb5-devel-1.2.2-5.alpha.rpm
dd8d77584d1d5b8c4e8f2d4bd9e0a48b 7.0/en/os/alpha/krb5-libs-1.2.2-5.alpha.rpm
970afd1e1a4719d69bf4017f854382b9 7.0/en/os/alpha/krb5-server-1.2.2-5.alpha.rpm
51fa47eb5fcb8ef62f2eea75df420034 7.0/en/os/alpha/krb5-workstation-1.2.2-5.alpha.rpm
d0be51614bd35fd9b19728f56d0888ed 7.0/en/os/i386/krb5-devel-1.2.2-5.i386.rpm
e5e0ba52db8502b4220065fa272d9141 7.0/en/os/i386/krb5-libs-1.2.2-5.i386.rpm
65663059a046813679c1e25a7e214cdd 7.0/en/os/i386/krb5-server-1.2.2-5.i386.rpm
8a3d78d021fbf4ea434989da1a5370ca 7.0/en/os/i386/krb5-workstation-1.2.2-5.i386.rpm
a304c1e0aafb594f6831795715ed854a 7.1/en/os/SRPMS/krb5-1.2.2-5.src.rpm
d0be51614bd35fd9b19728f56d0888ed 7.1/en/os/i386/krb5-devel-1.2.2-5.i386.rpm
e5e0ba52db8502b4220065fa272d9141 7.1/en/os/i386/krb5-libs-1.2.2-5.i386.rpm
65663059a046813679c1e25a7e214cdd 7.1/en/os/i386/krb5-server-1.2.2-5.i386.rpm
8a3d78d021fbf4ea434989da1a5370ca 7.1/en/os/i386/krb5-workstation-1.2.2-5.i386.rpm

These packages are GPG signed by Red Hat, Inc. for security.  Our key
is available at:
     http://www.Red Hat.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://web.mit.edu/kerberos/www/advisories/ftpbuf.txt


Copyright(c) 2000, 2001 Red Hat, Inc.

 
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