LinuxSecurity.com
Share your story
The central voice for Linux and Open Source security news
Home News Topics Advisories HOWTOs Features Newsletters About Register

Welcome!
Sign up!
EnGarde Community
Login
Polls
What is the most important Linux security technology?
 
Advisories
Community
Linux Events
Linux User Groups
Link to Us
Security Center
Book Reviews
Security Dictionary
Security Tips
SELinux
White Papers
Featured Blogs
All About Linux
DanWalsh LiveJournal
Securitydistro
Latest Newsletters
Linux Advisory Watch: November 21st, 2014
Linux Security Week: November 17th, 2014
Subscribe
LinuxSecurity Newsletters
E-mail:
Choose Lists:
About our Newsletters
RSS Feeds
Get the LinuxSecurity news you want faster with RSS
Powered By

  
Fedora: GnuPG Signing key vulnerability Print E-mail
User Rating:      How can I rate this item?
Posted by LinuxSecurity.com Team   
Fedora Phong Nguyen identified a severe bug in the way GnuPG creates anduses ElGamal keys, when those keys are used both to sign and encryptdata. This vulnerability can be used to trivially recover theprivate key.

---------------------------------------------------------------------
Fedora Security Update Notification
FEDORA-2003-025
2003-12-10
---------------------------------------------------------------------

Name        : gnupg
Version     : 1.2.3                      
Release     : 2                  
Summary     : A GNU utility for secure communication and data storage.
Description :
GnuPG (GNU Privacy Guard) is a GNU utility for encrypting data and
creating digital signatures. GnuPG has advanced key management
capabilities and is compliant with the proposed OpenPGP Internet
standard described in RFC2440. Since GnuPG doesn't use any patented
algorithm, it is not compatible with any version of PGP2 (PGP2.x uses
only IDEA for symmetric-key encryption, which is patented worldwide).

---------------------------------------------------------------------
Update Information:

Phong Nguyen identified a severe bug in the way GnuPG creates and
uses ElGamal keys, when those keys are used both to sign and encrypt
data.  This vulnerability can be used to trivially recover the
private key.  While the default behavior of GnuPG when generating
keys does not lead to the creation of unsafe keys, by overriding the
default settings an unsafe key could have been created.

If you are using ElGamal keys, you should revoke those keys
immediately.

The packages included in this update do not make ElGamal keys safe to
use; they merely include a patch by David Shaw that disables
functions that would generate or use ElGamal keys for encryption.

---------------------------------------------------------------------
* Mon Dec 01 2003 Nalin Dahyabhai <nalin@Red Hat.com> 1.2.3-2

- incorporate patch from gnupg-announce which removes the ability to create
  ElGamal encrypt+sign keys or to sign messages with such keys

* Mon Oct 27 2003 Nalin Dahyabhai <nalin@Red Hat.com> 1.2.3-1

- use -fPIE instead of -fpie because some arches need it

* Mon Oct 27 2003 Nalin Dahyabhai <nalin@Red Hat.com>

- build gnupg as a position-independent executable (Arjan van de Ven)

* Mon Aug 25 2003 Nalin Dahyabhai <nalin@Red Hat.com>

- add Werner's key as a source file

* Fri Aug 22 2003 Nalin Dahyabhai <nalin@Red Hat.com>

- update to 1.2.3


---------------------------------------------------------------------
This update can be downloaded from:
   http://download.fedora.Red Hat.com/pub/fedora/linux/core/updates/1/

b7457d205b1807677a352f734dd794b4  SRPMS/gnupg-1.2.3-2.src.rpm
b8d2688e98330f98e954ccffaf0aed79  i386/gnupg-1.2.3-2.i386.rpm
86b34157605dd65bd369d39a7b9d8ea2  i386/debug/gnupg-debuginfo-1.2.3-2.i386.rpm

This update can also be installed with the Update Agent; you can
launch the Update Agent with the 'up2date' command.
---------------------------------------------------------------------


 
< Prev   Next >
    
Partner

 

Latest Features
Peter Smith Releases Linux Network Security Online
Securing a Linux Web Server
Password guessing with Medusa 2.0
Password guessing as an attack vector
Squid and Digest Authentication
Squid and Basic Authentication
Demystifying the Chinese Hacking Industry: Earning 6 Million a Night
Free Online security course (LearnSIA) - A Call for Help
What You Need to Know About Linux Rootkits
Review: A Practical Guide to Fedora and Red Hat Enterprise Linux - Fifth Edition
Yesterday's Edition
Google Removes SSLv3 Fallback Support From Chrome
Hacker Lexicon: What Is End-to-End Encryption?
Partner Sponsor

Community | HOWTOs | Blogs | Features | Book Reviews | Networking
 Security Projects |  Latest News |  Newsletters |  SELinux |  Privacy |  Home
 Hardening |   About Us |   Advertise |   Legal Notice |   RSS |   Guardian Digital
(c)Copyright 2014 Guardian Digital, Inc. All rights reserved.