10 High
CVSS2
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
AV:N/AC:L/Au:N/C:C/I:C/A:C
0.127 Low
EPSS
Percentile
95.4%
A vulnerability in GnuPG may cause keys with multiple user ID’s to give other user IDs on the key a false amount of validity.
From the GnuPG homepage:
GnuPG stands for GNU Privacy Guard and is GNU's tool for secure communication and data storage. It can be used to encrypt data and to create digital signatures. It includes an advanced key management facility and is compliant with the proposed OpenPGP Internet standard as described in RFC 2440. As such, it is aimed to be compatible with PGP from NAI, Inc.
A vulnerability in GnuPG may cause keys with multiple user ID’s to give other user IDs on the key a false amount of validity. From the GnuPG announcement:
As part of the development of GnuPG 1.2.2, a bug was discovered 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.
A user encrypting a message using GnuPG may not be warned if the target user key being encrypted to has an “insufficient or no trust path”.
Apply a patch from your vendor. If a patch is not available, you may wish to apply the patch produced by the GnuPG team.
397604
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Updated: July 14, 2003
Affected
We have not received a statement from the vendor.
The vendor has not provided us with any further information regarding this vulnerability.
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1
`- --------------------------------------------------------------------------
CONECTIVA LINUX SECURITY ANNOUNCEMENT
PACKAGE : gnupg
SUMMARY : GnuPG key validity vulnerability
DATE : 2003-07-11 16:02:00
ID : CLA-2003:694
RELEVANT
RELEASES : 7.0, 8, 9
- -------------------------------------------------------------------------
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
Detailed instructions reagarding the use of apt and upgrade examples can be found at ``<http://distro.conectiva.com.br/atualizacoes/#apt?idioma=en>
- ------------------------------------------------------------------------- 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>``
- ------------------------------------------------------------------------- All our advisories and generic update instructions can be viewed at ``<http://distro.conectiva.com.br/atualizacoes/?idioma=en>``
- ------------------------------------------------------------------------- Copyright (c) 2003 Conectiva Inc. ``<http://www.conectiva.com>``
- ------------------------------------------------------------------------- subscribe: [email protected] unsubscribe: [email protected] -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.0.6 (GNU/Linux) Comment: For info see ``<http://www.gnupg.org>``
iD8DBQE/DxFK42jd0JmAcZARAsJ0AJ9WRo+Lzu25R0TqvmkH+ZkTFIYmdgCgvhrs 3naNkr4YyUGgYuYGJbq+u5w= =s3ko -----END PGP SIGNATURE-----
If you have feedback, comments, or additional information about this vulnerability, please send us [email](<mailto:[email protected]?Subject=VU%23397604 Feedback>).
Updated: May 20, 2003
Affected
We have not received a statement from the vendor.
The vendor has not provided us with any further information regarding this vulnerability.
Please see <http://lists.gnupg.org/pipermail/gnupg-announce/2003q2/000268.html>.
If you have feedback, comments, or additional information about this vulnerability, please send us [email](<mailto:[email protected]?Subject=VU%23397604 Feedback>).
Updated: May 20, 2003
Affected
We have not received a statement from the vendor.
The vendor has not provided us with any further information regarding this vulnerability.
Please see <http://lwn.net/Articles/32420/>.
If you have feedback, comments, or additional information about this vulnerability, please send us [email](<mailto:[email protected]?Subject=VU%23397604 Feedback>).
Updated: May 20, 2003
Affected
We have not received a statement from the vendor.
The vendor has not provided us with any further information regarding this vulnerability.
Please see <http://www.openpkg.org/security/OpenPKG-SA-2003.029-gnupg.html>.
If you have feedback, comments, or additional information about this vulnerability, please send us [email](<mailto:[email protected]?Subject=VU%23397604 Feedback>).
Updated: May 21, 2003
Affected
Please see <https://rhn.redhat.com/errata/RHSA-2003-175.html>.
The vendor has not provided us with any further information regarding this vulnerability.
The CERT/CC has no additional comments at this time.
If you have feedback, comments, or additional information about this vulnerability, please send us [email](<mailto:[email protected]?Subject=VU%23397604 Feedback>).
Updated: May 22, 2003
Affected
We have not received a statement from the vendor.
The vendor has not provided us with any further information regarding this vulnerability.
Please see http://www.slackware.com/security/viewer.php?l=slackware-security&y=2003&m=slackware-security.296270.
If you have feedback, comments, or additional information about this vulnerability, please send us [email](<mailto:[email protected]?Subject=VU%23397604 Feedback>).
Group | Score | Vector |
---|---|---|
Base | ||
Temporal | ||
Environmental |
This vulnerability was discovered by the GnuPG Team. The CERT/CC thanks the GnuPG Team for providing information upon which this document is based.
This document was written by Ian A Finlay.
CVE IDs: | CVE-2003-0255 |
---|---|
Severity Metric: | 6.75 Date Public: |