Debian: userv vulnerability
Posted by LinuxSecurity.com Team   
Debian It might be possible for local usersto abuse this to carry out unauthorised actions or be able to takecontrol for service user accounts.
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Debian Security Advisory                             security@debian.org 
http://www.debian.org/security/                         Wichert Akkerman
July 27, 2000
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Package        : userv
Problem type   : local exploit
Debian-specific: no

The version of userv that was distributed with Debian GNU/Linux 2.1 / slink
had a problem in the fd swapping algorithm: it could sometimes make an
out-of-bounds array reference. It might be possible for local users
to abuse this to carry out unauthorised actions or be able to take
control for service user accounts.

This has been fixed in version 1.0.1.0slink for Debian 2.1, and
version 1.0.1.1potato for Debian 2.2 .

We recommend you upgrade your uesrv package immediately.

wget url
        will fetch the file for you
dpkg -i file.deb
        will install the referenced file.

Debian GNU/Linux 2.1 alias slink
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  This version of Debian was released only for Intel, the Motorola
  680x0, the alpha and the Sun sparc architecture.


  Source archives:
     http://security.debian.org/dists/stable/updates/source/userv_1.0.1.0slink.dsc
      MD5 checksum: 473a8fe477d20614aad97f538896969a
     http://security.debian.org/dists/stable/updates/source/userv_1.0.1.0slink.tar.gz
      MD5 checksum: 40b052547e2ea9fa69a12ee24dfe2af7

  Alpha architecture:
     http://security.debian.org/dists/stable/updates/binary-alpha/userv_1.0.1.0slink_alpha.deb
      MD5 checksum: 4934d1163e2e5fbb2d74d5a949089aa7

  Intel ia32 architecture:
     http://security.debian.org/dists/stable/updates/binary-i386/userv_1.0.1.0slink_i386.deb
      MD5 checksum: ebf8d6cd431e94b6e731636d1d61440e

  Motorola 680x0 architecture:
     http://security.debian.org/dists/stable/updates/binary-m68k/userv_1.0.1.0slink_m68k.deb
       MD5 checksum: b59d78066362bce1f91005891958c362

  Sun Sparc architecture:
     http://security.debian.org/dists/stable/updates/binary-sparc/userv_1.0.1.0slink_sparc.deb
      MD5 checksum: ab880dac8965d99ca64044c0ef438975


Debian GNU/Linux 2.2 alias potato
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  Please note that woody has not been released yet. However since potato
  is very close to being release security updates are already being made
  available on security.debian.org. 

  Potato will be release for alpha, arm, i386, m68k, powerpc and sparc.
  However at this moment fixes are not available for all architectures.
  Packages for architectures not mentioned here will be available
  shortly on security.debian.org .


  Source archives:
     http://security.debian.org/dists/potato/updates/main/source/userv_1.0.1.1potato.dsc
      MD5 checksum: 1a92258cecdb878ddd2f58cd03bd59b1
     http://security.debian.org/dists/potato/updates/main/source/userv_1.0.1.1potato.tar.gz
      MD5 checksum: ddf8df51026a1b880dc95f9ca04a6deb

  Alpha architecture:
     http://security.debian.org/dists/potato/updates/main/binary-alpha/userv_1.0.1.1potato_alpha.deb
      MD5 checksum: 81d800fb0b29ef48f8b8bbc20e2b2ec1

  Intel ia32 architecture:
     http://security.debian.org/dists/potato/updates/main/binary-i386/userv_1.0.1.1potato_i386.deb
      MD5 checksum: 82752bd8dcc7ec1e187b6d9cfe7403d0

  Sun Sparc architecture:
     http://security.debian.org/dists/potato/updates/main/binary-sparc/userv_1.0.1.1potato_sparc.deb
      MD5 checksum: 019430e9ffdff374a87e0003da16b97b

  These files will be moved into
   ftp://ftp.debian.org/debian/dists/stable/*/binary-$arch/ soon.


For not yet released architectures please refer to the appropriate
directory  ftp://ftp.debian.org/debian/dists/sid/binary-$arch/ .

- -- 
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For apt-get: deb  http://security.debian.org/ stable updates
For dpkg-ftp:  ftp://security.debian.org/debian-security dists/stable/updates
Mailing list: debian-security-announce@lists.debian.org

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