Fedora: GnuPG Signing key vulnerability
Summary
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).
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.
- 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@RedHat.com> 1.2.3-1
- use -fPIE instead of -fpie because some arches need it
* Mon Oct 27 2003 Nalin Dahyabhai <nalin@RedHat.com>
- build gnupg as a position-independent executable (Arjan van de Ven)
* Mon Aug 25 2003 Nalin Dahyabhai <nalin@RedHat.com>
- add Werner's key as a source file
* Fri Aug 22 2003 Nalin Dahyabhai <nalin@RedHat.com>
- update to 1.2.3
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.
FEDORA-2003-025 2003-12-10 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). 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. - 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@RedHat.com> 1.2.3-1 - use -fPIE instead of -fpie because some arches need it * Mon Oct 27 2003 Nalin Dahyabhai <nalin@RedHat.com> - build gnupg as a position-independent executable (Arjan van de Ven) * Mon Aug 25 2003 Nalin Dahyabhai <nalin@RedHat.com> - add Werner's key as a source file * Fri Aug 22 2003 Nalin Dahyabhai <nalin@RedHat.com> - update to 1.2.3 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.
Change Log
References
Update Instructions
