Debian: netkit-telnet-ssl denial of service fix

    Date18 Oct 2004
    CategoryDebian
    1976
    Posted ByLinuxSecurity Advisories
    Michal Zalewski discovered a bug in the netkit-telnet server (telnetd) whereby a remote attacker could cause the telnetd process to free an invalid pointer.
    
    --------------------------------------------------------------------------
    Debian Security Advisory DSA 569-1                     This email address is being protected from spambots. You need JavaScript enabled to view it. 
    http://www.debian.org/security/                             Martin Schulze
    October 18th, 2004                       http://www.debian.org/security/faq
    --------------------------------------------------------------------------
    
    Package        : netkit-telnet-ssl
    Vulnerability  : invalid free(3)
    Problem-Type   : remote
    Debian-specific: yes
    CVE ID         : CAN-2004-0911
    Debian Bug     : 273694
    
    Michal Zalewski discovered a bug in the netkit-telnet server (telnetd)
    whereby a remote attacker could cause the telnetd process to free an
    invalid pointer.  This causes the telnet server process to crash,
    leading to a straightforward denial of service (inetd will disable the
    service if telnetd is crashed repeatedly), or possibly the execution
    of arbitrary code with the privileges of the telnetd process (by
    default, the 'telnetd' user).
    
    For the stable distribution (woody) this problem has been fixed in
    version 0.17.17+0.1-2woody2
    
    For the unstable distribution (sid) this problem has been fixed in
    version 0.17.24+0.1-4.
    
    We recommend that you upgrade your netkit-telnet-ssl 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 3.0 alias woody
    --------------------------------
    
      Source archives:
    
         http://security.debian.org/pool/updates/main/n/netkit-telnet-ssl/netkit-telnet-ssl_0.17.17+0.1-2woody2.dsc
          Size/MD5 checksum:      669 c0333bf798925d74a2b0cd156eb691cc
         http://security.debian.org/pool/updates/main/n/netkit-telnet-ssl/netkit-telnet-ssl_0.17.17+0.1-2woody2.diff.gz
          Size/MD5 checksum:     8632 d0b418abcc29fc1790ab5aafb6836dd1
         http://security.debian.org/pool/updates/main/n/netkit-telnet-ssl/netkit-telnet-ssl_0.17.17+0.1.orig.tar.gz
          Size/MD5 checksum:   167658 faf2d112bc4d44f522bad3bc73da8d6d
    
      Alpha architecture:
    
         http://security.debian.org/pool/updates/main/n/netkit-telnet-ssl/telnet-ssl_0.17.17+0.1-2woody2_alpha.deb
          Size/MD5 checksum:   101014 abb3671e001662e6e5166d716ad8bfb6
         http://security.debian.org/pool/updates/main/n/netkit-telnet-ssl/telnetd-ssl_0.17.17+0.1-2woody2_alpha.deb
          Size/MD5 checksum:    56848 bb8b0d77208c7f44c63e95a4f7083e21
    
      ARM architecture:
    
         http://security.debian.org/pool/updates/main/n/netkit-telnet-ssl/telnet-ssl_0.17.17+0.1-2woody2_arm.deb
          Size/MD5 checksum:    85130 a87761b01081e99e8acc94f40f3aa50b
         http://security.debian.org/pool/updates/main/n/netkit-telnet-ssl/telnetd-ssl_0.17.17+0.1-2woody2_arm.deb
          Size/MD5 checksum:    48482 cabc1071adeac0c6472dfb10731d6995
    
      Intel IA-32 architecture:
    
         http://security.debian.org/pool/updates/main/n/netkit-telnet-ssl/telnet-ssl_0.17.17+0.1-2woody2_i386.deb
          Size/MD5 checksum:    85456 5f9f99786a8a26c0dcdfacbd2da11383
         http://security.debian.org/pool/updates/main/n/netkit-telnet-ssl/telnetd-ssl_0.17.17+0.1-2woody2_i386.deb
          Size/MD5 checksum:    46586 fee9f04d1a9768f278537e5571300257
    
      Intel IA-64 architecture:
    
         http://security.debian.org/pool/updates/main/n/netkit-telnet-ssl/telnet-ssl_0.17.17+0.1-2woody2_ia64.deb
          Size/MD5 checksum:   123126 5ed1d2854d7e91f90724bebcf590252f
         http://security.debian.org/pool/updates/main/n/netkit-telnet-ssl/telnetd-ssl_0.17.17+0.1-2woody2_ia64.deb
          Size/MD5 checksum:    66550 dd096a3593565c983d94730eae09eee9
    
      HP Precision architecture:
    
         http://security.debian.org/pool/updates/main/n/netkit-telnet-ssl/telnet-ssl_0.17.17+0.1-2woody2_hppa.deb
          Size/MD5 checksum:    86484 f8105593d974b60cd6fcb5f23c41a890
         http://security.debian.org/pool/updates/main/n/netkit-telnet-ssl/telnetd-ssl_0.17.17+0.1-2woody2_hppa.deb
          Size/MD5 checksum:    53812 a2a6d0755b21d53714b34d1a3a38450c
    
      Motorola 680x0 architecture:
    
         http://security.debian.org/pool/updates/main/n/netkit-telnet-ssl/telnet-ssl_0.17.17+0.1-2woody2_m68k.deb
          Size/MD5 checksum:    81360 2a99b7a46d1e7f4abad46afef6549351
         http://security.debian.org/pool/updates/main/n/netkit-telnet-ssl/telnetd-ssl_0.17.17+0.1-2woody2_m68k.deb
          Size/MD5 checksum:    45370 31cb862bbaefbcc9520834fd7393abfb
    
      Big endian MIPS architecture:
    
         http://security.debian.org/pool/updates/main/n/netkit-telnet-ssl/telnet-ssl_0.17.17+0.1-2woody2_mips.deb
          Size/MD5 checksum:    97340 31a847f384aa1410f31785185d52bd75
         http://security.debian.org/pool/updates/main/n/netkit-telnet-ssl/telnetd-ssl_0.17.17+0.1-2woody2_mips.deb
          Size/MD5 checksum:    52136 311f7252452a4b39168a9ead120f71b2
    
      Little endian MIPS architecture:
    
         http://security.debian.org/pool/updates/main/n/netkit-telnet-ssl/telnet-ssl_0.17.17+0.1-2woody2_mipsel.deb
          Size/MD5 checksum:    97156 de9a70f8a3893c6698d001970c863341
         http://security.debian.org/pool/updates/main/n/netkit-telnet-ssl/telnetd-ssl_0.17.17+0.1-2woody2_mipsel.deb
          Size/MD5 checksum:    52116 6086a1e35d1c224ece0083aaf798468a
    
      PowerPC architecture:
    
         http://security.debian.org/pool/updates/main/n/netkit-telnet-ssl/telnet-ssl_0.17.17+0.1-2woody2_powerpc.deb
          Size/MD5 checksum:    88072 2b57b6050d961c729870c33346d5c95c
         http://security.debian.org/pool/updates/main/n/netkit-telnet-ssl/telnetd-ssl_0.17.17+0.1-2woody2_powerpc.deb
          Size/MD5 checksum:    48690 28bc44df1d4506e0231ece63f1ee8b86
    
      IBM S/390 architecture:
    
         http://security.debian.org/pool/updates/main/n/netkit-telnet-ssl/telnet-ssl_0.17.17+0.1-2woody2_s390.deb
          Size/MD5 checksum:    88562 77152b7fa6062a90eb505216f1d26bab
         http://security.debian.org/pool/updates/main/n/netkit-telnet-ssl/telnetd-ssl_0.17.17+0.1-2woody2_s390.deb
          Size/MD5 checksum:    50266 c8deb57a9029c38d2fe5f08d11c8c466
    
      Sun Sparc architecture:
    
         http://security.debian.org/pool/updates/main/n/netkit-telnet-ssl/telnet-ssl_0.17.17+0.1-2woody2_sparc.deb
          Size/MD5 checksum:    89212 7b810e8f0f16651b4c1d0e5bd4142031
         http://security.debian.org/pool/updates/main/n/netkit-telnet-ssl/telnetd-ssl_0.17.17+0.1-2woody2_sparc.deb
          Size/MD5 checksum:    54466 b82619bdb5299873a25cbbedf541ff15
    
    
      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
    Mailing list: This email address is being protected from spambots. You need JavaScript enabled to view it.
    Package info: `apt-cache show ' and  http://packages.debian.org/
    
    
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