OpenVPN VPN client format string vulnerability

Format string bug on parsing DHCP options obtained from server...

openvpn -- potential denial-of-service on servers in TCP mode

James Yonan reports: If the TCP server accept call returns an error status, the resulting exception handler may attempt to indirect through a NULL pointer, causing a segfault. Affects all OpenVPN 2.0 versions...

openvpn -- arbitrary code execution on client through malicious or compromised server

James Yonan reports: A format string vulnerability in the foreignoption function in options.c could potentially allow a malicious or compromised server to execute arbitrary code on the client. Only non-Windows clients are affected. The vulnerability only exists if a the client's TLS negotiation...

Debian DSA-851-1 : openvpn - programming errors

Several security related problems have been discovered in openvpn, a Virtual Private Network daemon. The Common Vulnerabilities and Exposures project identifies the following problems : - CAN-2005-2531 Wrong processing of failed certificate authentication when running with 'verb 0' and without TL...

[SECURITY] [DSA 851-1] New openvpn packages fix denial of service

-------------------------------------------------------------------------- Debian Security Advisory DSA 851-1 [email protected] http://www.debian.org/security/ Martin Schulze October 9th, 2005 http://www.debian.org/security/faq -...

[SECURITY] [DSA 851-1] New openvpn packages fix denial of service

-------------------------------------------------------------------------- Debian Security Advisory DSA 851-1 [email protected] http://www.debian.org/security/ Martin Schulze October 9th, 2005 http://www.debian.org/security/faq -...

DSA-851-1 openvpn - denial of service

Bulletin has no description...

Security fix for the ALT Linux 9 package openvpn version 2.0.2-alt1

Aug. 25, 2005 Nikolay A. Fetisov 2.0.2-alt1 - New version 2.0.2: -- Security fix for several DoS attacks: CAN-2005-2531; CAN-2005-2532; CAN-2005-2533; CAN-2005-2534. -- Several minor bug fixes and improvements, see ChangeLog for details - Run in chroot by default...

CVE-2005-2531

OpenVPN

CVE-2005-2531

OpenVPN before 2.0.1, when running with "verb 0" and without TLS authentication, does not properly flush the OpenSSL error queue when a client fails certificate authentication to the server and causes the error to be processed by the wrong client, which allows remote attackers to cause a denial o...

CVE-2005-2532

OpenVPN before 2.0.1 is affected by CVE-2005-2532: the server’s handling of packets that cannot be decrypted can lead to disconnection of unrelated clients (a DoS). The root cause is improper flushing of the OpenSSL error queue when a decryption failure occurs, allowing the failure to spill over ...

CVE-2005-2531

OpenVPN before 2.0.1, when running with "verb 0" and without TLS authentication, does not properly flush the OpenSSL error queue when a client fails certificate authentication to the server and causes the error to be processed by the wrong client, which allows remote attackers to cause a denial o...

CVE-2005-2533

OpenVPN before 2.0.1, when running in "dev tap" Ethernet bridging mode, allows remote authenticated clients to cause a denial of service memory exhaustion via a flood of packets with a large number of spoofed MAC addresses...

CVE-2005-2531

OpenVPN before 2.0.1, when running with "verb 0" and without TLS authentication, does not properly flush the OpenSSL error queue when a client fails certificate authentication to the server and causes the error to be processed by the wrong client, which allows remote attackers to cause a denial o...

DEBIAN-CVE-2005-2531

OpenVPN before 2.0.1, when running with "verb 0" and without TLS authentication, does not properly flush the OpenSSL error queue when a client fails certificate authentication to the server and causes the error to be processed by the wrong client, which allows remote attackers to cause a denial o...

CVE-2005-2532

OpenVPN before 2.0.1 does not properly flush the OpenSSL error queue when a packet can not be decrypted by the server, which allows remote authenticated attackers to cause a denial of service client disconnection via a large number of packets that can not be decrypted...

CVE-2005-2531

OpenVPN before 2.0.1, when running with "verb 0" and without TLS authentication, does not properly flush the OpenSSL error queue when a client fails certificate authentication to the server and causes the error to be processed by the wrong client, which allows remote attackers to cause a denial o...

CVE-2005-2534

Race condition in OpenVPN before 2.0.1, when --duplicate-cn is not enabled, allows remote attackers to cause a denial of service server crash via simultaneous TCP connections from multiple clients that use the same client certificate...

CVE-2005-2531

OpenVPN before 2.0.1, when running with "verb 0" and without TLS authentication, does not properly flush the OpenSSL error queue when a client fails certificate authentication to the server and causes the error to be processed by the wrong client, which allows remote attackers to cause a denial o...

CVE-2005-2533

OpenVPN prior to 2.0.1 is affected when running in dev tap Ethernet bridging mode. A remote authenticated client can exhaust memory by sending a flood of packets with spoofed MAC addresses, causing a denial of service. Remediation: upgrade to OpenVPN 2.0.1 or newer as indicated by public advisori...