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RedHat: gnupg vulnerability Print E-mail
User Rating:      How can I rate this item?
Posted by LinuxSecurity.com Team   
RedHat Linux These updates address a potential vulnerability which could allow anattacker to compute a user's secret key.

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

Synopsis:          Updated gnupg packages available
Advisory ID:       RHSA-2001:063-02
Issue date:        2001-05-02
Updated on:        2001-05-16
Product:           Red Hat Linux
Keywords:          gnupg klima rosa
Cross references:  
Obsoletes:         RHSA-2000:131
---------------------------------------------------------------------

1. Topic:

Updated gnupg packages are now available for Red Hat Linux 6.2, 7, and 7.1.
 These updates address a potential vulnerability which could allow an
attacker to compute a user's secret key.

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 modifying an unsuspecting user's private keyring, an attacker can cause
a user to generate incorrect signatures for data.  If a user generates both
a correct and an incorrect signature for the same data, the different
signatures can be used to compute the user's secret key.

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):

33473 - secret keyring compromise leading to secret key disclosure

6. RPMs required:

Red Hat Linux 6.2:

SRPMS: 
ftp://updates.Red Hat.com/6.2/en/os/SRPMS/gnupg-1.0.5-0.6.x.src.rpm

alpha: 
ftp://updates.Red Hat.com/6.2/en/os/alpha/gnupg-1.0.5-0.6.x.alpha.rpm

i386: 
ftp://updates.Red Hat.com/6.2/en/os/i386/gnupg-1.0.5-0.6.x.i386.rpm

sparc: 
ftp://updates.Red Hat.com/6.2/en/os/sparc/gnupg-1.0.5-0.6.x.sparc.rpm

Red Hat Linux 7.0:

SRPMS: 
ftp://updates.Red Hat.com/7.0/en/os/SRPMS/gnupg-1.0.5-1.src.rpm

alpha: 
ftp://updates.Red Hat.com/7.0/en/os/alpha/gnupg-1.0.5-1.alpha.rpm

i386: 
ftp://updates.Red Hat.com/7.0/en/os/i386/gnupg-1.0.5-1.i386.rpm

Red Hat Linux 7.1:

SRPMS: 
ftp://updates.Red Hat.com/7.1/en/os/SRPMS/gnupg-1.0.5-1.src.rpm

i386: 
ftp://updates.Red Hat.com/7.1/en/os/i386/gnupg-1.0.5-1.i386.rpm



7. Verification:

MD5 sum                           Package Name
--------------------------------------------------------------------------
89938a0670ba2588cf0c109c05b2a604 6.2/en/os/SRPMS/gnupg-1.0.5-0.6.x.src.rpm
338782bd895ab81fb7e84d36005fa95e 6.2/en/os/alpha/gnupg-1.0.5-0.6.x.alpha.rpm
3ff455f2312c083994ab7e9c7369e325 6.2/en/os/i386/gnupg-1.0.5-0.6.x.i386.rpm
bae79560d0a6cde8746492d15a57ec19 6.2/en/os/sparc/gnupg-1.0.5-0.6.x.sparc.rpm
3a7fed8e807ccb992ce0e05d0a7bbdff 7.0/en/os/SRPMS/gnupg-1.0.5-1.src.rpm
3b84f8fcdd97846ec3435bcdc0a8e4c5 7.0/en/os/alpha/gnupg-1.0.5-1.alpha.rpm
c5633eb35d1dc7c753da7ea850eba864 7.0/en/os/i386/gnupg-1.0.5-1.i386.rpm
3a7fed8e807ccb992ce0e05d0a7bbdff 7.1/en/os/SRPMS/gnupg-1.0.5-1.src.rpm
c5633eb35d1dc7c753da7ea850eba864 7.1/en/os/i386/gnupg-1.0.5-1.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://lists.gnupg.org/pipermail/gnupg-announce/2001-April/000238.html 
http://www.i.cz/en/pdf/openPGP_attack_ENGvktr.pdf


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

 
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