SuSE Security Announcement

19 Aug 1999

A security hole was discovered in the package mentioned above.
Please update as soon as possible or disable the service if you are using
this software on your SuSE Linux installation(s).

Other Linux distributions or operating systems might be affected as
well, please contact your vendor for information about this issue.

Please note, that that we provide this information on as "as-is" basis only.
There is no warranty whatsoever and no liability for any direct, indirect or
incidental damage arising from this information or the installation of
the update package.

______________________________________________________________________________

1. Problem Description

    xmonisdn which is part of the i4l package is installed setuid root
    by default.
    To control and display the status of the ISDN network connections
    xmonisdn uses external programs, which are executed by the system()
    systemcall, without taking care of a safe environment.
    The problem arises by old libc, that don't overwrite the IFS environment
    variable.

2. Impact

    By manipulating the IFS (or PATH) environment variable an attacker is
    able to execute his own programs with root privileges.

3. Solution

    A temporary fix:
      /bin/chmod u-s /usr/bin/xmonisdn

    Install the updated package, as soon as it is available from our
    ftp server.

______________________________________________________________________________

Webpage for patches:
        http://www.suse.de/patches/index.html

or try the following web pages for a list of mirrors:

        http://www.suse.de/ftp.html
        http://www.suse.com/ftp_new.html

______________________________________________________________________________

SuSE has got two free security mailing list services to which any
interested party may subscribe:

suse-security@suse.com          - unmoderated and for general/linux/SuSE
                                  security discussions. All SuSE security
                                  announcements are send to this list.

suse-security-announce@suse.com - SuSE's announce-only mailing list.
                                  Only SuSE's security annoucements are sent
                                  to this list.

To subscribe, send an email to majordomo@suse.com with the text

        subscribe suse-security
or
        subscribe suse-security-announce

in the body of the message. Or just issue a

        echo subscribe suse-security | mail majordomo@suse.com
or
        echo subscribe suse-security-announce | mail majordomo@suse.com

______________________________________________________________________________

If you want to report *NEW* security bugs in the SuSE Linux Distribution
please send an email to security@suse.de or call our support line.
You may use pgp with the public key below to ensure confidentiality.
______________________________________________________________________________

  This information is provided freely to everyone interested and may
  be redistributed provided that it is not altered in any way.

Type Bits/KeyID    Date       User ID
pub  2048/3D25D3D9 1999/03/06 SuSE Security Team <security@suse.de>

- -----BEGIN PGP PUBLIC KEY BLOCK-----
Version: 2.6.3i

mQENAzbhLQQAAAEIAKAkXHe0lWRBXLpn38hMHy03F0I4Sszmoc8aaKJrhfhyMlOA
BqvklPLE2f9UrI4Xc860gH79ZREwAgPt0pi6+SleNFLNcNFAuuHMLQOOsaMFatbz
JR9i4m/lf6q929YROu5zB48rBAlcfTm+IBbijaEdnqpwGib45wE/Cfy6FAttBHQh
1Kp+r/jPbf1mYAvljUfHKuvbg8t2EIQz/5yGp+n5trn9pElfQO2cRBq8LFpf1l+U
P7EKjFmlOq+Gs/fF98/dP3DfniSd78LQPq5vp8RL8nr/o2i7jkAQ33m4f1wOBWd+
cZovrKXYlXiR+Bf7m2hpZo+/sAzhd7LmAD0l09kABRG0JVN1U0UgU2VjdXJpdHkg
VGVhbSA8c2VjdXJpdHlAc3VzZS5kZT6JARUDBRA24S1H5Fiyh7HKPEUBAVcOB/9b
yHYji1/+4Xc2GhvXK0FSJN0MGgeXgW47yxDL7gmR4mNgjlIOUHZj0PEpVjWepOJ7
tQS3L9oP6cpj1Fj/XxuLbkp5VCQ61hpt54coQAvYrnT9rtWEGN+xmwejT1WmYmDJ
xG+EGBXKr+XP69oIUl1E2JO3rXeklulgjqRKos4cdXKgyjWZ7CP9V9daRXDtje63
Om8gwSdU/nCvhdRIWp/Vwbf7Ia8iZr9OJ5YuQl0DBG4qmGDDrvImgPAFkYFzwlqo
choXFQ9y0YVCV41DnR+GYhwl2qBd81T8aXhihEGPIgaw3g8gd8B5o6mPVgl+nJqI
BkEYGBusiag2pS6qwznZiQEVAwUQNuEtBHey5gA9JdPZAQFtOAf+KVh939b0J94u
v/kpg4xs1LthlhquhbHcKNoVTNspugiC3qMPyvSX4XcBr2PC0cVkS4Z9PY9iCfT+
x9WM96g39dAF+le2CCx7XISk9XXJ4ApEy5g4AuK7NYgAJd39PPbERgWnxjxir9g0
Ix30dS30bW39D+3NPU5Ho9TD/B7UDFvYT5AWHl3MGwo3a1RhTs6sfgL7yQ3U+mvq
MkTExZb5mfN1FeaYKMopoI4VpzNVeGxQWIz67VjJHVyUlF20ekOz4kWVgsxkc8G2
saqZd6yv2EwqYTi8BDAduweP33KrQc4KDDommQNDOXxaKOeCoESIdM4p7Esdjq1o
L0oixF12Cg==
=pIeS
- -----END PGP PUBLIC KEY BLOCK-----

-----BEGIN PGP SIGNATURE-----
Version: 2.6.3i
Charset: noconv

iQEVAwUBN7uws3ey5gA9JdPZAQEkwQf7B6KwgbKBW1oNYgugAB+IuNKPyezZ9dQ4
VUj70nw/Q+RtazX2JFwQ6BoN9gFdlBJ0GJ3xvTdtXybJx4TgOuqROO5iiPJe5R1r
ZObBcZzuFuCyNlbhLLoL/O1AA+sWd1HtsP6n3S3R0w5a2Dz3RArc5IkYtgCmJngB
LVLLU6cctPKYZ/80fmr1vrgl6NYEwrwHDI2Ag/yidzV+iXvG0i4Q4oebgqEqrwDB
EWOZY2+TSTX4+MyAVzNV72DtvV+YU8zjR8wrwAge8gF3SaUp4qWjD2JyVK27WYZm
Blv2HM3+L5BDTtQ9b0L7ropy7h1Xo9y6KGxKaGMZO2U5dZoFKelm5Q==
=9z0b
-----END PGP SIGNATURE-----

Thomas Biege

tags

participants (1)