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HistoryOct 09, 2005 - 12:00 a.m.

openvpn - denial of service

2005-10-0900:00:00
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osv.dev
10

0.034 Low

EPSS

Percentile

91.4%

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.

CPENameOperatorVersion
openvpneq2.0-1