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GnuPG OpenPGP Message Decryption Vulnerability
Secunia Advisory: SA23245
Release Date: 2006-12-06
Last Update: 2006-12-19
Popularity: 12,225 views

Critical:
Highly critical
Impact: System access
Where: From remote
Solution Status: Vendor Patch

Software:GnuPG / gpg 1.0.x
GnuPG / gpg 1.2.x
GnuPG / gpg 1.3.x
GnuPG / gpg 1.4.x
GnuPG / gpg 2.x

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CVE reference:CVE-2006-6235


Description:
Tavis Ormandy has reported a vulnerability in GnuPG, which can be exploited by malicious people to compromise a vulnerable system.

The vulnerability is caused due to an error within the decryption of malformed OpenPGP messages. This can be exploited to corrupt memory when decrypting a specially crafted OpenPGP message.

Successful exploitation allows execution of arbitrary code.

The vulnerability is reported in versions prior to 1.4.6 and 2.0.2.

Solution:
Update to a fixed version or apply patch.

GnuPG 1.4:
Update to version 1.4.6 or apply patch.

GnuPG 2.0:
Apply patch.

Provided and/or discovered by:
Tavis Ormandy

Changelog:
2006-12-08: Updated link to vendor advisory.
2006-12-19: Added link to US-CERT.

Original Advisory:
http://lists.gnupg.org/pipermail/gnupg-announce/2006q4/000246.html

Other References:
US-CERT VU#427009:
http://www.kb.cert.org/vuls/id/427009


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