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Security Advisory gnupg security update

Advisory: RHSA-2006:0266-8
Type: Security Advisory
Severity: Important
Issued on: 2006-03-15
Last updated on: 2006-03-15
Affected Products: Red Hat Desktop (v. 3)
Red Hat Desktop (v. 4)
Red Hat Enterprise Linux AS (v. 2.1)
Red Hat Enterprise Linux AS (v. 3)
Red Hat Enterprise Linux AS (v. 4)
Red Hat Enterprise Linux ES (v. 2.1)
Red Hat Enterprise Linux ES (v. 3)
Red Hat Enterprise Linux ES (v. 4)
Red Hat Enterprise Linux WS (v. 2.1)
Red Hat Enterprise Linux WS (v. 3)
Red Hat Enterprise Linux WS (v. 4)
Red Hat Linux Advanced Workstation 2.1 for the Itanium Processor
CVEs (cve.mitre.org): CVE-2006-0049
CVE-2006-0455

Details

An updated GnuPG package that fixes signature verification flaws as well as
minor bugs is now available.

This update has been rated as having important security impact by the Red
Hat Security Response Team.

GnuPG is a utility for encrypting data and creating digital signatures.

Tavis Ormandy discovered a bug in the way GnuPG verifies cryptographically
signed data with detached signatures. It is possible for an attacker to
construct a cryptographically signed message which could appear to come
from a third party. When a victim processes a GnuPG message with a
malformed detached signature, GnuPG ignores the malformed signature,
processes and outputs the signed data, and exits with status 0, just as it
would if the signature had been valid. In this case, GnuPG's exit status
would not indicate that no signature verification had taken place. This
issue would primarily be of concern when processing GnuPG results via an
automated script. The Common Vulnerabilities and Exposures project assigned
the name CVE-2006-0455 to this issue.

Tavis Ormandy also discovered a bug in the way GnuPG verifies
cryptographically signed data with inline signatures. It is possible for an
attacker to inject unsigned data into a signed message in such a way that
when a victim processes the message to recover the data, the unsigned data
is output along with the signed data, gaining the appearance of having been
signed. This issue is mitigated in the GnuPG shipped with Red Hat
Enterprise Linux as the --ignore-crc-error option must be passed to the gpg
executable for this attack to be successful. The Common Vulnerabilities and
Exposures project assigned the name CVE-2006-0049 to this issue.

Please note that neither of these issues affect the way RPM or up2date
verify RPM package files, nor is RPM vulnerable to either of these issues.

All users of GnuPG are advised to upgrade to this updated package, which
contains backported patches to correct these issues.


Solution

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

This update is available via Red Hat Network. 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.

Updated packages

Red Hat Desktop (v. 3)

SRPMS:
gnupg-1.2.1-15.src.rpm
File outdated by:  RHSA-2007:0106
    MD5: e37b4079cb0dc795de0019b14a363f2a
 
IA-32:
gnupg-1.2.1-15.i386.rpm
File outdated by:  RHSA-2007:0106
    MD5: 8ef6ad0316bec8ede544c25cf7e30717
 
x86_64:
gnupg-1.2.1-15.x86_64.rpm
File outdated by:  RHSA-2007:0106
    MD5: 0ec4f9ce23dc41ca9a0e17c40ba3fbd4
 
Red Hat Desktop (v. 4)

SRPMS:
gnupg-1.2.6-3.src.rpm
File outdated by:  RHBA-2010:0447
    MD5: 174cd0720920c12354f2240722df75f9
 
IA-32:
gnupg-1.2.6-3.i386.rpm
File outdated by:  RHBA-2010:0447
    MD5: 355d8f416080f4630fde887d970aa5aa
 
x86_64:
gnupg-1.2.6-3.x86_64.rpm
File outdated by:  RHBA-2010:0447
    MD5: a9b6b5a4051daa5cf86aa7a3279e54a4
 
Red Hat Enterprise Linux AS (v. 2.1)

SRPMS:
gnupg-1.0.7-16.src.rpm
File outdated by:  RHSA-2007:0106
    MD5: d15956e38c9d217ac93f5ed0cd5ce4f3
 
IA-32:
gnupg-1.0.7-16.i386.rpm
File outdated by:  RHSA-2007:0106
    MD5: cfcc3babbfc6f972dabbbac06e685f7d
 
IA-64:
gnupg-1.0.7-16.ia64.rpm
File outdated by:  RHSA-2007:0106
    MD5: 8c1dddef36a9e45e9ae1444b82e28bea
 
Red Hat Enterprise Linux AS (v. 3)

SRPMS:
gnupg-1.2.1-15.src.rpm
File outdated by:  RHSA-2007:0106
    MD5: e37b4079cb0dc795de0019b14a363f2a
 
IA-32:
gnupg-1.2.1-15.i386.rpm
File outdated by:  RHSA-2007:0106
    MD5: 8ef6ad0316bec8ede544c25cf7e30717
 
IA-64:
gnupg-1.2.1-15.ia64.rpm
File outdated by:  RHSA-2007:0106
    MD5: 594517a016b7bc7bee68cbca40bd9ead
 
PPC:
gnupg-1.2.1-15.ppc.rpm
File outdated by:  RHSA-2007:0106
    MD5: ac5d223e4a840999eecb87bc2626f7f1
 
s390:
gnupg-1.2.1-15.s390.rpm
File outdated by:  RHSA-2007:0106
    MD5: 5bfa85eae3fda393ca1a80ef12107221
 
s390x:
gnupg-1.2.1-15.s390x.rpm
File outdated by:  RHSA-2007:0106
    MD5: a83363632fb9f9e77db7593f878c0136
 
x86_64:
gnupg-1.2.1-15.x86_64.rpm
File outdated by:  RHSA-2007:0106
    MD5: 0ec4f9ce23dc41ca9a0e17c40ba3fbd4
 
Red Hat Enterprise Linux AS (v. 4)

SRPMS:
gnupg-1.2.6-3.src.rpm
File outdated by:  RHBA-2010:0447
    MD5: 174cd0720920c12354f2240722df75f9
 
IA-32:
gnupg-1.2.6-3.i386.rpm
File outdated by:  RHBA-2010:0447
    MD5: 355d8f416080f4630fde887d970aa5aa
 
IA-64:
gnupg-1.2.6-3.ia64.rpm
File outdated by:  RHBA-2010:0447
    MD5: d414315f567d1e29f59e0b39b94e067e
 
PPC:
gnupg-1.2.6-3.ppc.rpm
File outdated by:  RHBA-2010:0447
    MD5: 8b2400f89d1a5238988fd5d55cbc6ac6
 
s390:
gnupg-1.2.6-3.s390.rpm
File outdated by:  RHBA-2010:0447
    MD5: e6cc5d8bb6055da2bd328261485b1097
 
s390x:
gnupg-1.2.6-3.s390x.rpm
File outdated by:  RHBA-2010:0447
    MD5: ec581afb36353fb531634cb835f4f3e1
 
x86_64:
gnupg-1.2.6-3.x86_64.rpm
File outdated by:  RHBA-2010:0447
    MD5: a9b6b5a4051daa5cf86aa7a3279e54a4
 
Red Hat Enterprise Linux ES (v. 2.1)

SRPMS:
gnupg-1.0.7-16.src.rpm
File outdated by:  RHSA-2007:0106
    MD5: d15956e38c9d217ac93f5ed0cd5ce4f3
 
IA-32:
gnupg-1.0.7-16.i386.rpm
File outdated by:  RHSA-2007:0106
    MD5: cfcc3babbfc6f972dabbbac06e685f7d
 
Red Hat Enterprise Linux ES (v. 3)

SRPMS:
gnupg-1.2.1-15.src.rpm
File outdated by:  RHSA-2007:0106
    MD5: e37b4079cb0dc795de0019b14a363f2a
 
IA-32:
gnupg-1.2.1-15.i386.rpm
File outdated by:  RHSA-2007:0106
    MD5: 8ef6ad0316bec8ede544c25cf7e30717
 
IA-64:
gnupg-1.2.1-15.ia64.rpm
File outdated by:  RHSA-2007:0106
    MD5: 594517a016b7bc7bee68cbca40bd9ead
 
x86_64:
gnupg-1.2.1-15.x86_64.rpm
File outdated by:  RHSA-2007:0106
    MD5: 0ec4f9ce23dc41ca9a0e17c40ba3fbd4
 
Red Hat Enterprise Linux ES (v. 4)

SRPMS:
gnupg-1.2.6-3.src.rpm
File outdated by:  RHBA-2010:0447
    MD5: 174cd0720920c12354f2240722df75f9
 
IA-32:
gnupg-1.2.6-3.i386.rpm
File outdated by:  RHBA-2010:0447
    MD5: 355d8f416080f4630fde887d970aa5aa
 
IA-64:
gnupg-1.2.6-3.ia64.rpm
File outdated by:  RHBA-2010:0447
    MD5: d414315f567d1e29f59e0b39b94e067e
 
x86_64:
gnupg-1.2.6-3.x86_64.rpm
File outdated by:  RHBA-2010:0447
    MD5: a9b6b5a4051daa5cf86aa7a3279e54a4
 
Red Hat Enterprise Linux WS (v. 2.1)

SRPMS:
gnupg-1.0.7-16.src.rpm
File outdated by:  RHSA-2007:0106
    MD5: d15956e38c9d217ac93f5ed0cd5ce4f3
 
IA-32:
gnupg-1.0.7-16.i386.rpm
File outdated by:  RHSA-2007:0106
    MD5: cfcc3babbfc6f972dabbbac06e685f7d
 
Red Hat Enterprise Linux WS (v. 3)

SRPMS:
gnupg-1.2.1-15.src.rpm
File outdated by:  RHSA-2007:0106
    MD5: e37b4079cb0dc795de0019b14a363f2a
 
IA-32:
gnupg-1.2.1-15.i386.rpm
File outdated by:  RHSA-2007:0106
    MD5: 8ef6ad0316bec8ede544c25cf7e30717
 
IA-64:
gnupg-1.2.1-15.ia64.rpm
File outdated by:  RHSA-2007:0106
    MD5: 594517a016b7bc7bee68cbca40bd9ead
 
x86_64:
gnupg-1.2.1-15.x86_64.rpm
File outdated by:  RHSA-2007:0106
    MD5: 0ec4f9ce23dc41ca9a0e17c40ba3fbd4
 
Red Hat Enterprise Linux WS (v. 4)

SRPMS:
gnupg-1.2.6-3.src.rpm
File outdated by:  RHBA-2010:0447
    MD5: 174cd0720920c12354f2240722df75f9
 
IA-32:
gnupg-1.2.6-3.i386.rpm
File outdated by:  RHBA-2010:0447
    MD5: 355d8f416080f4630fde887d970aa5aa
 
IA-64:
gnupg-1.2.6-3.ia64.rpm
File outdated by:  RHBA-2010:0447
    MD5: d414315f567d1e29f59e0b39b94e067e
 
x86_64:
gnupg-1.2.6-3.x86_64.rpm
File outdated by:  RHBA-2010:0447
    MD5: a9b6b5a4051daa5cf86aa7a3279e54a4
 
Red Hat Linux Advanced Workstation 2.1 for the Itanium Processor

SRPMS:
gnupg-1.0.7-16.src.rpm
File outdated by:  RHSA-2007:0106
    MD5: d15956e38c9d217ac93f5ed0cd5ce4f3
 
IA-64:
gnupg-1.0.7-16.ia64.rpm
File outdated by:  RHSA-2007:0106
    MD5: 8c1dddef36a9e45e9ae1444b82e28bea
 
(The unlinked packages above are only available from the Red Hat Network)

Bugs fixed (see bugzilla for more information)

167392 - initial gpg run doesn't create .gnupg/secring.gpg
179506 - RHEL3, gnupg-1.2.1-10, gpg: Creates corrupt files (probably 2GB problem)
183484 - CVE-2006-0455 gpg will quietly exit when attempting to verify a malformed message
184556 - CVE-2006-0049 Gnupg incorrect malformed message verification


References



These packages are GPG signed by Red Hat for security. Our key and details on how to verify the signature are available from:
https://www.redhat.com/security/team/key/#package

The Red Hat security contact is secalert@redhat.com. More contact details at http://www.redhat.com/security/team/contact/