GnuTLS Prior to 2.6.6 Multiple Remote Vulnerabilities

BID:34783

Info

GnuTLS Prior to 2.6.6 Multiple Remote Vulnerabilities

Bugtraq ID: 34783
Class: Unknown
CVE: CVE-2009-1416
CVE-2009-1415
CVE-2009-1417
Remote: Yes
Local: No
Published: Apr 30 2009 12:00AM
Updated: Dec 07 2009 07:44PM
Credit: Miroslav Kratochvil, Simon Josefsson, and Romain Francoise
Vulnerable: Slackware Linux 12.2
Slackware Linux 12.1
Slackware Linux 12.0
Slackware Linux -current
Mandriva Linux Mandrake 2009.1 x86_64
Mandriva Linux Mandrake 2009.1
Mandriva Linux Mandrake 2009.0 x86_64
Mandriva Linux Mandrake 2009.0
Mandriva Linux Mandrake 2008.1 x86_64
Mandriva Linux Mandrake 2008.1
Mandriva Linux Mandrake 2008.0 x86_64
Mandriva Linux Mandrake 2008.0
MandrakeSoft Corporate Server 4.0 x86_64
MandrakeSoft Corporate Server 4.0
GNU GnuTLS 2.6.5
GNU GnuTLS 2.6.4
GNU GnuTLS 2.6.3
GNU GnuTLS 2.6.2
GNU GnuTLS 2.6.1
GNU GnuTLS 2.6
Gentoo Linux
Not Vulnerable: GNU GnuTLS 2.6.6

Discussion

GnuTLS Prior to 2.6.6 Multiple Remote Vulnerabilities

GnuTLS is prone to multiple remote vulnerabilities:

- A remote code-execution vulnerability
- A denial-of-service vulnerability
- A signature-generation vulnerability
- A signature-verification vulnerability

An attacker can exploit these issues to potentially execute arbitrary code, trigger denial-of-service conditions, carry out attacks against data signed with weak signatures, and cause clients to accept expired or invalid certificates from servers.

Versions prior to GnuTLS 2.6.6 are vulnerable.

Exploit / POC

GnuTLS Prior to 2.6.6 Multiple Remote Vulnerabilities

The following sites from the vendor can be used to check for the issue involving expired certificates:

Expired server certificate
https://expired.demo.gnutls.org/

Expire intermediate certificate, server return intermediate CA
https://expired-subca.demo.gnutls.org/

Expire intermediate certificate server does not return intermediate CA
https://expired-subca2.demo.gnutls.org/

The vendor has also provided tools to reproduce the memory-corruption issue related to freeing an uninitialized pointer as well as the issue involving the creation of bad keys.

Solution / Fix

GnuTLS Prior to 2.6.6 Multiple Remote Vulnerabilities

Solution:
The vendor has released GnuTLS 2.6.6 to address this issue. Please see the references for more information.


Mandriva Linux Mandrake 2008.0 x86_64

Mandriva Linux Mandrake 2008.0

GNU GnuTLS 2.6

GNU GnuTLS 2.6.1

GNU GnuTLS 2.6.2

GNU GnuTLS 2.6.3

GNU GnuTLS 2.6.4

GNU GnuTLS 2.6.5

References

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