OpenVPN Same Client Certificate Denial Of Service Vulnerability

BID:14610

Info

OpenVPN Same Client Certificate Denial Of Service Vulnerability

Bugtraq ID: 14610
Class: Race Condition Error
CVE: CVE-2005-2534
Remote: Yes
Local: No
Published: Aug 19 2005 12:00AM
Updated: Jul 12 2009 05:06PM
Credit: The vendor has released this vulnerability.
Vulnerable: ProZIlla ProZilla Download Accelarator 1.4 .0
ProZIlla ProZilla Download Accelarator 1.3.2
ProZIlla ProZilla Download Accelarator 1.2.1
OpenVPN OpenVPN 2.0
+ Debian Linux 3.1 sparc
 + Debian Linux 3.1 s/390
 + Debian Linux 3.1 ppc
 + Debian Linux 3.1 mipsel
 + Debian Linux 3.1 mips
 + Debian Linux 3.1 m68k
 + Debian Linux 3.1 ia-64
 + Debian Linux 3.1 ia-32
 + Debian Linux 3.1 hppa
 + Debian Linux 3.1 arm
 + Debian Linux 3.1 amd64
 + Debian Linux 3.1 alpha
 + Debian Linux 3.1
OpenVPN OpenVPN 1.6 .0
OpenVPN OpenVPN 1.5 .0
OpenVPN OpenVPN 1.4.3
OpenVPN OpenVPN 1.4.2
OpenVPN OpenVPN 1.4.1
MandrakeSoft Multi Network Firewall 2.0
Not Vulnerable: OpenVPN OpenVPN 2.0.1

Discussion

OpenVPN Same Client Certificate Denial Of Service Vulnerability

OpenVPN is prone to a denial of service vulnerability. This vulnerability results in a race condition crashing the affected server.

This vulnerability will allow an authenticated attacker to deny service to legitimate users and to crash the affected server application.

Exploit / POC

OpenVPN Same Client Certificate Denial Of Service Vulnerability

No exploit is required.

Solution / Fix

OpenVPN Same Client Certificate Denial Of Service Vulnerability

Solution:
The vendor has released version 2.0.1 to resolve this issue.

Mandriva has released advisory MDKSA-2005:145, along with fixes to address various issues in OpenVPN. Please see the referenced advisory for further information.

Debian has released advisory DSA 851-1 to address this issue. Please see the referenced advisory for more information.


ProZIlla ProZilla Download Accelarator 1.2.1

ProZIlla ProZilla Download Accelarator 1.3.2

ProZIlla ProZilla Download Accelarator 1.4 .0

OpenVPN OpenVPN 1.4.1

OpenVPN OpenVPN 1.4.2

OpenVPN OpenVPN 1.4.3

OpenVPN OpenVPN 1.5 .0

OpenVPN OpenVPN 1.6 .0

OpenVPN OpenVPN 2.0

MandrakeSoft Multi Network Firewall 2.0

References

OpenVPN Same Client Certificate Denial Of Service Vulnerability

References:

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