Linux Security
    Linux Security
    Linux Security

    Debian: xinetd denial of service

    Date 13 Aug 2002
    Posted By LinuxSecurity Advisories
    File descriptors for the signal pipe in xinetd are leaked into services started from xinetd. The descriptors could be used to talk to xinetd resulting in a denial of service.
    - --------------------------------------------------------------------------
    Debian Security Advisory DSA 151-1                     This email address is being protected from spambots. You need JavaScript enabled to view it.                             Martin Schulze
    August 13th, 2002   
    - --------------------------------------------------------------------------
    Package        : xinetd
    Vulnerability  : pipe exposure
    Problem-Type   : local
    Debian-specific: no
    Solar Designer found a vulnerability in xinetd, a replacement for the
    BSD derived inetd.  File descriptors for the signal pipe introduced in
    version 2.3.4 are leaked into services started from xinetd.  The
    descriptors could be used to talk to xinetd resulting in crashing it
    entirely.  This is usually called a denial of service.
    This problem has been fixed by the package maintainer in version
    2.3.4-1.2 for the current stable distribution (woody) and in version
    2.3.7-1 for the unstable distribution (sid).  The old stable
    distribution (potato) is not affected, since it doesn't contain the
    signal pipe.
    We recommend that you upgrade your xinetd packages.
    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 3.0 alias woody
    - --------------------------------
      Source archives:
          Size/MD5 checksum:      596 6e437a7317228d6baaf1013cc060dcd9
          Size/MD5 checksum:    34109 ea09f66719c48976345d104c94d8d7a0
          Size/MD5 checksum:   270723 8f7ac612910aaf811c4554f4ab40fd65
      Alpha architecture:
          Size/MD5 checksum:   144548 4a380b4e80f789be31e41b3cc1ca6c25
      ARM architecture:
          Size/MD5 checksum:   119372 e9f22ebf109fbbb45e2488090b024a78
      Intel IA-32 architecture:
          Size/MD5 checksum:   114380 82e2f7248fcec69f1a4390d4e22c799d
      Intel IA-64 architecture:
          Size/MD5 checksum:   170536 a0545b8a5b0989e04f1178592aeec414
      HP Precision architecture:
          Size/MD5 checksum:   134914 b2f95d5464fe03115f8b6c88f2587939
      Motorola 680x0 architecture:
          Size/MD5 checksum:   109000 1c59983898111932ed5554708742fd73
      Big endian MIPS architecture:
          Size/MD5 checksum:   133488 711b97de8092f465b89a8c3b332c0198
      Little endian MIPS architecture:
          Size/MD5 checksum:   134214 21ef9ae6317261fade057163cafc7d01
      PowerPC architecture:
          Size/MD5 checksum:   124404 87b9958221e1bf9048a4d3650cd89e21
      IBM S/390 architecture:
          Size/MD5 checksum:   120268 1248fb8bbb886916c25e2ac5d2523bd4
      Sun Sparc architecture:
          Size/MD5 checksum:   124144 055c71fccc937b6784d114cb7860a171
      These files will probably be moved into the stable distribution on
      its next revision.
    - ---------------------------------------------------------------------------------
    For apt-get: deb stable/updates main
    For dpkg-ftp: dists/stable/updates/main
    Mailing list: This email address is being protected from spambots. You need JavaScript enabled to view it.
    Package info: `apt-cache show ' and

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