Debian: New openvpn packages fix denial of service

    Date08 Oct 2005
    CategoryDebian
    6604
    Posted ByJoe Shakespeare
    Updated package.
    - --------------------------------------------------------------------------
    Debian Security Advisory DSA 851-1                     This email address is being protected from spambots. You need JavaScript enabled to view it.
    http://www.debian.org/security/                             Martin Schulze
    October 9th, 2005                       http://www.debian.org/security/faq
    - --------------------------------------------------------------------------
    
    Package        : openvpn
    Vulnerability  : programming errors
    Problem type   : remote
    Debian-specific: no
    CVE ID         : CAN-2005-2531 CAN-2005-2532 CAN-2005-2533 CAN-2005-2534
    Debian Bug     : 324167
    
    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.
    
    
    Upgrade Instructions
    - --------------------
    
    wget url
            will fetch the file for you
    dpkg -i file.deb
            will install the referenced file.
    
    If you are using the apt-get package manager, use the line for
    sources.list as given below:
    
    apt-get update
            will update the internal database
    apt-get upgrade
            will install corrected packages
    
    You may use an automated update by adding the resources from the
    footer to the proper configuration.
    
    
    Debian GNU/Linux 3.1 alias sarge
    - --------------------------------
    
      Source archives:
    
        http://security.debian.org/pool/updates/main/o/openvpn/openvpn_2.0-1sarge1.dsc
          Size/MD5 checksum:      629 1fee867074a153eac1f82d11e75aa833
        http://security.debian.org/pool/updates/main/o/openvpn/openvpn_2.0-1sarge1.diff.gz
          Size/MD5 checksum:    51566 578da11dd408ea72e4791646e700dac4
        http://security.debian.org/pool/updates/main/o/openvpn/openvpn_2.0.orig.tar.gz
          Size/MD5 checksum:   639201 7401faebc6baee9add32608709c54eec
    
      Alpha architecture:
    
        http://security.debian.org/pool/updates/main/o/openvpn/openvpn_2.0-1sarge1_alpha.deb
          Size/MD5 checksum:   347184 ed8f3706d9f7af8b4baf148786141e5a
    
      AMD64 architecture:
    
        http://security.debian.org/pool/updates/main/o/openvpn/openvpn_2.0-1sarge1_amd64.deb
          Size/MD5 checksum:   316422 3dfdd5a007c62ceb28153e63677a884a
    
      ARM architecture:
    
        http://security.debian.org/pool/updates/main/o/openvpn/openvpn_2.0-1sarge1_arm.deb
          Size/MD5 checksum:   296464 20f23e0a9f251eedc340e926f455c8e0
    
      Intel IA-32 architecture:
    
        http://security.debian.org/pool/updates/main/o/openvpn/openvpn_2.0-1sarge1_i386.deb
          Size/MD5 checksum:   302424 fe92352695fd5fdfa85a4ffea6b7cffe
    
      Intel IA-64 architecture:
    
        http://security.debian.org/pool/updates/main/o/openvpn/openvpn_2.0-1sarge1_ia64.deb
          Size/MD5 checksum:   395514 04207a2bfd92cd56c79a4d434f514bee
    
      HP Precision architecture:
    
        http://security.debian.org/pool/updates/main/o/openvpn/openvpn_2.0-1sarge1_hppa.deb
          Size/MD5 checksum:   316716 8065982ef523c653e8d25bedf716fb03
    
      Motorola 680x0 architecture:
    
        http://security.debian.org/pool/updates/main/o/openvpn/openvpn_2.0-1sarge1_m68k.deb
          Size/MD5 checksum:   276388 33de460a73afad6cb44a6753ea862c27
    
      Big endian MIPS architecture:
    
        http://security.debian.org/pool/updates/main/o/openvpn/openvpn_2.0-1sarge1_mips.deb
          Size/MD5 checksum:   317632 d8f4dd1ea4fce2c4c48a3e096d3da12c
    
      Little endian MIPS architecture:
    
        http://security.debian.org/pool/updates/main/o/openvpn/openvpn_2.0-1sarge1_mipsel.deb
          Size/MD5 checksum:   319404 c9a918128a56462a98049b160bfeb9d0
    
      PowerPC architecture:
    
        http://security.debian.org/pool/updates/main/o/openvpn/openvpn_2.0-1sarge1_powerpc.deb
          Size/MD5 checksum:   308772 1f7300816c44924fc10b5ba6e59ff00c
    
      IBM S/390 architecture:
    
        http://security.debian.org/pool/updates/main/o/openvpn/openvpn_2.0-1sarge1_s390.deb
          Size/MD5 checksum:   307220 bf9b59dab82ff1bd49ce7b4a3c9f2d7f
    
      Sun Sparc architecture:
    
        http://security.debian.org/pool/updates/main/o/openvpn/openvpn_2.0-1sarge1_sparc.deb
          Size/MD5 checksum:   294696 503317cf10f2976dffa8d25056517925
    
    
      These files will probably be moved into the stable distribution on
      its next update.
    
    - ---------------------------------------------------------------------------------
    For apt-get: deb http://security.debian.org/ stable/updates main
    For dpkg-ftp: ftp://security.debian.org/debian-security dists/stable/updates/main
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