DSA-851-1 openvpn -- programming errors

Debian Security Advisory

DSA-851-1 openvpn -- programming errors

Date Reported:

09 Oct 2005

Affected Packages:

openvpn

Vulnerable:

Yes

Security database references:

In the Debian bugtracking system: Bug 324167.
In Mitre's CVE dictionary: CVE-2005-2531, CVE-2005-2532, CVE-2005-2533, CVE-2005-2534.

More information:

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 TLS authentication can lead to a denial of service by disconnecting the wrong client.

• CAN-2005-2532

  Wrong handling of packets that can't be decrypted on the server can lead to the disconnection of unrelated clients.

• CAN-2005-2533

  When running in "dev tap" Ethernet bridging mode, openvpn can exhaust its memory by receiving a large number of spoofed MAC addresses and hence denying service.

• CAN-2005-2534

  Simultaneous TCP connections from multiple clients with the same client certificate can cause a denial of service when --duplicate-cn is not enabled.

The old stable distribution (woody) does not contain openvpn packages.

For the stable distribution (sarge) these problems have been fixed in version 2.0-1sarge1.

For the unstable distribution (sid) these problems have been fixed in version 2.0.2-1.

We recommend that you upgrade your openvpn package.

Fixed in:

Debian GNU/Linux 3.1 (sarge)

Source:

http://security.debian.org/pool/updates/main/o/openvpn/openvpn_2.0-1sarge1.dsc

http://security.debian.org/pool/updates/main/o/openvpn/openvpn_2.0-1sarge1.diff.gz

http://security.debian.org/pool/updates/main/o/openvpn/openvpn_2.0.orig.tar.gz

Alpha:

http://security.debian.org/pool/updates/main/o/openvpn/openvpn_2.0-1sarge1_alpha.deb

AMD64:

http://security.debian.org/pool/updates/main/o/openvpn/openvpn_2.0-1sarge1_amd64.deb

ARM:

http://security.debian.org/pool/updates/main/o/openvpn/openvpn_2.0-1sarge1_arm.deb

Intel IA-32:

http://security.debian.org/pool/updates/main/o/openvpn/openvpn_2.0-1sarge1_i386.deb

Intel IA-64:

http://security.debian.org/pool/updates/main/o/openvpn/openvpn_2.0-1sarge1_ia64.deb

HPPA:

http://security.debian.org/pool/updates/main/o/openvpn/openvpn_2.0-1sarge1_hppa.deb

Motorola 680x0:

http://security.debian.org/pool/updates/main/o/openvpn/openvpn_2.0-1sarge1_m68k.deb

Big endian MIPS:

http://security.debian.org/pool/updates/main/o/openvpn/openvpn_2.0-1sarge1_mips.deb

Little endian MIPS:

http://security.debian.org/pool/updates/main/o/openvpn/openvpn_2.0-1sarge1_mipsel.deb

PowerPC:

http://security.debian.org/pool/updates/main/o/openvpn/openvpn_2.0-1sarge1_powerpc.deb

IBM S/390:

http://security.debian.org/pool/updates/main/o/openvpn/openvpn_2.0-1sarge1_s390.deb

Sun Sparc:

http://security.debian.org/pool/updates/main/o/openvpn/openvpn_2.0-1sarge1_sparc.deb

MD5 checksums of the listed files are available in the original advisory.