Conectiva Information for VU#397604

GnuPG contains flaw in key validation code

Status

Affected

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

Vendor References

None

Addendum

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CONECTIVA LINUX SECURITY ANNOUNCEMENT
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PACKAGE   : gnupg
SUMMARY   : GnuPG key validity vulnerability
DATE      : 2003-07-11 16:02:00
ID        : CLA-2003:694
RELEVANT
RELEASES  : 7.0, 8, 9

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DESCRIPTION
GnuPG[1] is a OpenPGP-compliant tool for secure communication used
to, for example, sign emails, encrypt, decrypt and verify (signed)
data.


During the development of GnuPG 1.2.2, a bug has been found in the
key validation code. This bug causes keys with more than one user ID
to give all user IDs on the key the amount of validity given to the
most-valid key. In this situation, GnuPG would not emit a warning
when a low trust ID is used for encryption if that key also contains
a trusted enough ID.


Keys with only one ID are not affected by this problem.

For Conectiva Linux 7.0 and 8, the GnuPG package has been updated to
version 1.0.7 and includes a fix provided by the authors[2]. GnuPG in
Conectiva Linux 9 does not need a version upgrade and includes the
same patch.




SOLUTION
It is recommended that all GnuPG users upgrade their packages.


IMPORTANT: as part of the changes introduced in GnuPG versions 1.0.7
and later, public keys for which the user as a corresponding secret
key are no longer automatically considered trusted. To ease the
transition, a script called "convert-from-106" (part of GnuPG-1.2.2)
has been included in these packages. If executed, this script will
mark as trusted all public keys for which the current user has the
corresponding private keys.



REFERENCES
1.http://www.gnupg.org/
2.http://lists.gnupg.org/pipermail/gnupg-announce/2003q2/000268.html
3.http://cve.mitre.org/cgi-bin/cvename.cgi?name=2003-0255



UPDATED PACKAGES
ftp://atualizacoes.conectiva.com.br/7.0/SRPMS/gnupg-1.0.7-1U70_1cl.src.rpm
ftp://atualizacoes.conectiva.com.br/7.0/RPMS/gnupg-1.0.7-1U70_1cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/7.0/RPMS/gnupg-doc-1.0.7-1U70_1cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/8/SRPMS/gnupg-1.0.7-1U80_1cl.src.rpm
ftp://atualizacoes.conectiva.com.br/8/RPMS/gnupg-1.0.7-1U80_1cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/8/RPMS/gnupg-doc-1.0.7-1U80_1cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/9/SRPMS/gnupg-1.2.1-19780U90_1cl.src.rpm
ftp://atualizacoes.conectiva.com.br/9/RPMS/gnupg-1.2.1-19780U90_1cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/9/RPMS/gnupg-doc-1.2.1-19780U90_1cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/9/RPMS/gnupg-keyserver-plugins-1.2.1-19780U90_1cl.i386.rpm


ADDITIONAL INSTRUCTIONS
The apt tool can be used to perform RPM packages upgrades:


- run:                 apt-get update
- after that, execute: apt-get upgrade


Detailed instructions reagarding the use of apt and upgrade examples
can be found at
http://distro.conectiva.com.br/atualizacoes/#apt?idioma=en

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All packages are signed with Conectiva's GPG key. The key and instructions
on how to import it can be found at
http://distro.conectiva.com.br/seguranca/chave/?idioma=en
Instructions on how to check the signatures of the RPM packages can be
found at
http://distro.conectiva.com.br/seguranca/politica/?idioma=en

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All our advisories and generic update instructions can be viewed at
http://distro.conectiva.com.br/atualizacoes/?idioma=en

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Copyright (c) 2003 Conectiva Inc.
http://www.conectiva.com

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Version: GnuPG v1.0.6 (GNU/Linux)
Comment: For info see
http://www.gnupg.org

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