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Category:   Application (Security)  >   GnuPG (Gnu Privacy Guard) Vendors:
GnuPG May Fail to Detect the Injection of Unsigned Data
SecurityTracker Alert ID:  1015749
SecurityTracker URL:
CVE Reference:   CVE-2006-0049   (Links to External Site)
Date:  Mar 10 2006
Impact:   Modification of system information
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): prior to
Description:   A vulnerability was reported in GnuPG. A user can inject unsigned data without detection.

When GnuPG is used for signature verification, the software may not detect certain injected data. A remote user can prepend or append arbitrary data without modifying the original data or the signature. The software will not detect the remote users "extra" data.

Detached signatures (e.g., those in a separate signature file) are not affected.

GnuPG version 1.9.x is not affected unless the currently deprecated gpg part is enabled.

The vendor credits Tavis Ormandy with discovering this vulnerability.

Impact:   A remote user may be able to preprend or append arbitrary data that will not be detected by the signature verification mechanism.
Solution:   The vendor has issued a fixed version (, available at:

Vendor URL: (Links to External Site)
Cause:   Authentication error, State error
Underlying OS:  Linux (Any), UNIX (Any)

Message History:   This archive entry has one or more follow-up message(s) listed below.
Mar 15 2006 (Red Hat Issues Fix) GnuPG May Fail to Detect the Injection of Unsigned Data
Red Hat has released a fix for Red Hat Enterprise Linux 2.1, 3, and 4.

 Source Message Contents

[Original Message Not Available for Viewing]

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