GnuPG ElGamal Signing Key Private Key Compromise Vulnerability

BID:9115

Info

GnuPG ElGamal Signing Key Private Key Compromise Vulnerability

Bugtraq ID: 9115
Class: Design Error
CVE: CVE-2003-0971
Remote: Yes
Local: No
Published: Nov 27 2003 12:00AM
Updated: Jul 12 2009 12:56AM
Credit: Discovery of this issue is credited to Phong Q. Nguyen.
Vulnerable: SGI ProPack 2.4
SGI ProPack 2.3
Redhat gnupg-1.2.1-3.i386.rpm
+ Redhat Linux 9.0 i386
 Redhat gnupg-1.0.7-6.i386.rpm
+ Redhat Linux 8.0 i386
 Redhat gnupg-1.0.6-5.i386.rpm
+ Redhat Linux 7.3 i386
 Redhat gnupg-1.0.6-3.ia64.rpm
+ Redhat Linux 7.2 ia64
 Redhat gnupg-1.0.6-3.i386.rpm
+ Redhat Linux 7.2 i386
 Redhat gnupg-1.0.4-11.i386.rpm
+ Redhat Linux 7.1 i386
 GNU GNU Privacy Guard 1.2.3
+ Mandriva Linux Mandrake 9.2
+ Turbolinux Turbolinux Desktop 10.0
GNU GNU Privacy Guard 1.2.2 -rc1
+ S.u.S.E. Linux Personal 8.2
GNU GNU Privacy Guard 1.2.2 -r1
+ Gentoo Linux 1.4 _rc3
 + Gentoo Linux 1.4 _rc2
 + Gentoo Linux 1.4 _rc1
 GNU GNU Privacy Guard 1.2.2
+ Caldera OpenLinux Server 3.1.1
+ Caldera OpenLinux Workstation 3.1.1
+ Mandriva Linux Mandrake 9.1 ppc
 + Mandriva Linux Mandrake 9.1
GNU GNU Privacy Guard 1.2.1
+ OpenPKG OpenPKG 1.2
+ Redhat Linux 9.0 i386
 + Terra Soft Solutions Yellow Dog Linux 3.0
GNU GNU Privacy Guard 1.2
GNU GNU Privacy Guard 1.0.7
+ MandrakeSoft apcupsd 2006.0
 + MandrakeSoft Corporate Server 2.1 x86_64
 + MandrakeSoft Corporate Server 2.1
+ MandrakeSoft Multi Network Firewall 2.0
+ Mandriva Linux Mandrake 9.0
+ Mandriva Linux Mandrake 8.2 ppc
 + Mandriva Linux Mandrake 8.2
+ OpenPKG OpenPKG 1.1
+ Redhat Enterprise Linux AS 2.1 IA64
 + Redhat Enterprise Linux AS 2.1
 + Redhat Enterprise Linux ES 2.1 IA64
 + Redhat Enterprise Linux ES 2.1
 + Redhat Enterprise Linux WS 2.1 IA64
 + Redhat Enterprise Linux WS 2.1
 + Redhat Linux 8.0 i386
 + Redhat Linux 7.3 i386
 + Redhat Linux 7.2 ia64
 + Redhat Linux 7.2 i386
 + Redhat Linux 7.1 i386
 + Redhat Linux Advanced Work Station 2.1
+ Sun Linux 5.0.5
+ Turbolinux Turbolinux Server 8.0
+ Turbolinux Turbolinux Server 7.0
+ Turbolinux Turbolinux Server 6.5
+ Turbolinux Turbolinux Server 6.1
+ Turbolinux Turbolinux Workstation 8.0
+ Turbolinux Turbolinux Workstation 7.0
+ Turbolinux Turbolinux Workstation 6.0
GNU GNU Privacy Guard 1.0.6
+ Debian Linux 3.0 sparc
 + Debian Linux 3.0 s/390
 + Debian Linux 3.0 ppc
 + Debian Linux 3.0 mipsel
 + Debian Linux 3.0 mips
 + Debian Linux 3.0 m68k
 + Debian Linux 3.0 ia-64
 + Debian Linux 3.0 ia-32
 + Debian Linux 3.0 hppa
 + Debian Linux 3.0 arm
 + Debian Linux 3.0 alpha
 + Debian Linux 3.0
GNU GNU Privacy Guard 1.0.5
- Caldera OpenLinux 2.4
- Caldera OpenLinux 2.3
- Caldera OpenLinux eBuilder 3.0
- Debian Linux 2.2 sparc
 - Debian Linux 2.2 powerpc
 - Debian Linux 2.2 arm
 - Debian Linux 2.2 alpha
 - Debian Linux 2.2 68k
 - Debian Linux 2.2
- Immunix Immunix OS 7.0 beta
 - Immunix Immunix OS 7.0
- Immunix Immunix OS 6.2
- MandrakeSoft Corporate Server 1.0.1
- Mandriva Linux Mandrake 8.1
- Mandriva Linux Mandrake 8.0 ppc
 - Mandriva Linux Mandrake 8.0
- Mandriva Linux Mandrake 7.2
- Mandriva Linux Mandrake 7.1
- Microsoft Windows 95
- Microsoft Windows 98
- Microsoft Windows ME
- Redhat Linux 7.1 i386
 - Redhat Linux 7.1
- Redhat Linux 7.0 i386
 - Redhat Linux 7.0 alpha
 - Redhat Linux 7.0
- Redhat Linux 6.2 sparc
 - Redhat Linux 6.2 i386
 - Redhat Linux 6.2 alpha
 - Redhat Linux 6.2
 - SuSE Linux 7.1
- SuSE Linux 7.0
- SuSE Linux 6.4
- SuSE Linux 6.3
- Trustix Secure Linux 1.2
- Trustix Secure Linux 1.1
GNU GNU Privacy Guard 1.0.4
- Turbolinux Turbolinux 6.0.5
- Turbolinux Turbolinux Server 6.5
- Turbolinux Turbolinux Workstation 6.1
GNU GNU Privacy Guard 1.0.3 b
GNU GNU Privacy Guard 1.0.3
GNU GNU Privacy Guard 1.0.2
Not Vulnerable:

Discussion

GnuPG ElGamal Signing Key Private Key Compromise Vulnerability

GnuPG is prone to a vulnerability in the implementation of ElGamal signing keys that could compromise private keys. The vendor has stated that this vulnerability could be practically exploited to compromise private keys in seconds. This vulnerability was introduced as of version 1.0.2 of GnuPG.

Exploit / POC

GnuPG ElGamal Signing Key Private Key Compromise Vulnerability

The vendor has reported that there is a practical attack which will compromise private keys and all ElGamal signing keys that have been generated with vulnerable versions of the software should be considered compromised.

Solution / Fix

GnuPG ElGamal Signing Key Private Key Compromise Vulnerability

Solution:
Debian has released an updated advisory (DSA 429-2) and fixes to address this issue. Please see the referenced advisory for links to fixed packages.

Red Hat has released an advisory (RHSA-2003:390-01) that includes fixes for this issue. Please see the attached advisory for details on obtaining and applying fixes.

Conectiva has released an advisory that includes fixes for this issue.

Mandrake has released an advisory and fixes for this issue.

SuSE has released an advisory (SuSE-SA:2003:048) that includes fixes for this issue. Please see the attached advisory for details on obtaining and applying fixes.

The vendor has released a patch for this issue that can be applied to version 1.2.3. This fix will also be included in the next version.

Gentoo has released an advisory (200312-05) to address this issue. All Gentoo Linux systems should be updated to use gnupg-1.2.3-r5 or higher as follows:

emerge sync
emerge -pv '>=app-crypt/gnupg-1.2.3-r5'
emerge '>=app-crypt/gnupg-1.2.3-r5'
emerge clean

TurboLinux has released advisory TLSA-2003-68 and fixes to address this issue.

SGI advisory 20031203-01-U has been released to address this issue.

Debian has released an advisory (DSA 429-1) and fixes to address this issue. Please see the referenced advisory for links to fixed packages.

SGI has released an advisory 20040202-01-U to address this and other issues in SGI ProPack 2.4. Please see the referenced advisory for more information.

SCO has released advisory CSSA-2004-009.0 to address this issue.

Fixes are available below:


Redhat gnupg-1.0.7-6.i386.rpm

Redhat gnupg-1.2.1-3.i386.rpm

Redhat gnupg-1.0.6-3.ia64.rpm

Redhat gnupg-1.0.6-3.i386.rpm

Redhat gnupg-1.0.4-11.i386.rpm

Redhat gnupg-1.0.6-5.i386.rpm

GNU GNU Privacy Guard 1.0.7

GNU GNU Privacy Guard 1.2.2

GNU GNU Privacy Guard 1.2.2 -rc1

GNU GNU Privacy Guard 1.2.3

SGI ProPack 2.4

References

GnuPG ElGamal Signing Key Private Key Compromise Vulnerability

References:

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