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    OpenVPN LZO vulnerability

    OpenVPN
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    • BismarckB
      Bismarck
      last edited by

      http://blog.securitymouse.com/2014/06/raising-lazarus-20-year-old-bug-that.html

      Because of the speed and efficiency of the algorithm, LZO has made its way into both proprietary and open source projects world-wide. It's has lived in automotive systems, airplanes, and other embedded systems for over a decade. The algorithm has even made its way into projects we use on a daily basis, such as OpenVPN, MPlayer2, Libav, FFmpeg, the Linux kernel, Juniper Junos, and much, much, more.

      I don't know if its critic or not, just reporting.

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      • jimpJ
        jimp Rebel Alliance Developer Netgate
        last edited by

        I may be missing something, but it reads like it needs 16+MB of data to work, and OpenVPN would compress one packet at a time (practically, no larger than 1500bytes per packet, less really with overhead).

        If OpenVPN issues a statement we may need to update, but unless someone can show it's vulnerable on OpenVPN (+FreeBSD) then it may not be a problem.

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        • BismarckB
          Bismarck
          last edited by

          Okay, thanks for the clarification. :)

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          • AhnHELA
            AhnHEL
            last edited by

            https://community.openvpn.net/openvpn/ticket/419

            AhnHEL (Angel)

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            • jimpJ
              jimp Rebel Alliance Developer Netgate
              last edited by

              Their analysis was better than mine but reached the same conclusion. There's no way to exploit it via OpenVPN.

              It's still difficult to exploit even using other methods.

              http://it.slashdot.org/story/14/06/28/1949243/are-the-hard-to-exploit-bugs-in-lzo-compression-algorithm-just-hype

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