Bug 111345 - CAN-2003-0971 GnuPG ElGamal compromise
CAN-2003-0971 GnuPG ElGamal compromise
Product: Red Hat Enterprise Linux 2.1
Classification: Red Hat
Component: gnupg (Show other bugs)
All Linux
medium Severity medium
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Assigned To: Nalin Dahyabhai
Mike McLean
: Security
Depends On:
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Reported: 2003-12-02 09:01 EST by Mark J. Cox (Product Security)
Modified: 2007-11-30 17:06 EST (History)
0 users

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Doc Type: Bug Fix
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Last Closed: 2003-12-10 19:18:58 EST
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Description Mark J. Cox (Product Security) 2003-12-02 09:01:32 EST
hong Nguyen identified a severe bug in the way GnuPG creates and uses
ElGamal keys, which can be used for signing. 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 revoke those keys immediately.

The packages included in our upcoming update do not make such keys
safe to use -- they merely include a patch by David Shaw that disables
functions which would generate or use such keys.

RHSA-2003:395 in progress

       CAN-2003-0971 Affects: 2.1AS 2.1AW 2.1ES 2.1WS
       CAN-2003-0971 Affects: 3AS 3ES 3WS
Comment 1 Nalin Dahyabhai 2003-12-10 19:18:58 EST
An errata has been issued which should help the problem described in this bug report. 
This report is therefore being closed with a resolution of ERRATA. For more information
on the solution and/or where to find the updated files, please follow the link below. You may reopen 
this bug report if the solution does not work for you.


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