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________________________________________________________________________
Linux-Mandrake Security Update Advisory
________________________________________________________________________
Package name: perl
Date: August 8th, 2000
Advisory ID: MDKSA-2000:031
Affected versions: 6.0, 6.1, 7.0, 7.1
________________________________________________________________________
Problem Description:
There is a vulnerability that exists when using setuidperl together
with the mailx program. In some cases, setuidperl will warn root that
something has going on. The setuidperl program uses /bin/mail to send
the message, as root, with the environment preserved. An undocumented
feature of /bin/mail consists of it interpretting the ~! sequence even
if it is not running on the terminal, and the message also contains the
script name, taken from argv[1]. With all of this combined, it is
possible to execute a command using ~! passed in the script name to
create a suid shell. The instance of setuidperl sending such a
message can only be reached if you try to fool perl into forcing the
execution of one file instead of another. This vulnerability may not
be limited to just the mailx program, which is why an upgrade for perl
is provided as opposed to an upgrade for mailx.
________________________________________________________________________
Please verify these md5 checksums of the updates prior to upgrading to
ensure the integrity of the downloaded package. You can do this by
running the md5sum program on the downloaded package by using
"md5sum package.rpm" or by using a version of RPM greater than 3.0
with
the command "rpm -K package_name". This will also check the GnuPG
signature of the package provided you have the public key as part of
your keyring (the public key is provided at the end of this advisory).
Linux-Mandrake 6.0:
1c42a4a20c7c042f78ae846cc9bfdc81 6.0/RPMS/perl-5.00503-5mdk.i586.rpm
3c0d7424d519fc616ce6c902dbbbf760 6.0/SRPMS/perl-5.00503-5mdk.src.rpm
Linux-Mandrake 6.1:
cfdba31ce88d7a72f00ae2f27d4596db 6.1/RPMS/perl-5.00503-5mdk.i586.rpm
3c0d7424d519fc616ce6c902dbbbf760 6.1/SRPMS/perl-5.00503-5mdk.src.rpm
Linux-Mandrake 7.0:
054c9b11a79651d742a465f8ca15a0e8 7.0/RPMS/perl-5.00503-11mdk.i586.rpm
7b699435cc912993d21f4b35f780b366
7.0/RPMS/perl-base-5.00503-11mdk.i586.rpm
86eb8dea7b0ed397cb145a9cc118843e 7.0/SRPMS/perl-5.00503-11mdk.src.rpm
Linux-Mandrake 7.1:
39a43d7f8449a692e11fa384343dc939 7.1/RPMS/perl-5.600-5mdk.i586.rpm
025428ebc98430c138979f9cd3f1bdb8 7.1/RPMS/perl-base-5.600-5mdk.i586.rpm
332ef51a58f9946b5c834fd1acc681bd 7.1/SRPMS/perl-5.600-5mdk.src.rpm
________________________________________________________________________
To upgrade automatically, use MandrakeUpdate.
If you want to upgrade manually, download the updated package from one
of our FTP server mirrors and uprade with "rpm -Uvh package_name".
You can download the updates directly from:
ftp://ftp.linux.tucows.com/pub/distributions/Mandrake/Mandrake/updates
ftp://ftp.free.fr/pub/Distributions_Linux/Mandrake/updates
Or try one of the other mirrors listed at:
http://www.linux-mandrake.com/en/ftp.php3.
Updated packages are available in the "updates/[ver]/RPMS/" directory.
For example, if you are looking for an updated RPM package for
Linux-Mandrake 7.1, look for it in "updates/7.1/RPMS/". Updated
source
RPMs are available as well, but you generally do not need to download
them.
Please be aware that sometimes it takes the mirrors a few hours to
update, so if you want an immediate upgrade, please use one of the two
above-listed mirrors.
You can view other security advisories for Linux-Mandrake at:
http://www.linux-mandrake.com/en/fupdates.php3
If you want to report vulnerabilities, please contact
security@linux-mandrake.com
________________________________________________________________________
Linux-Mandrake has two security-related mailing list services that
anyone can subscribe to:
security-announce@linux-mandrake.com
Linux-Mandrake''s security announcements mailing list. Only
announcements are sent to this list and it is read-only.
security-discuss@linux-mandrake.com
Linux-Mandrake''s security discussion mailing list. This list is open
to anyone to discuss Linux-Mandrake security specifically and Linux
security in general.
To subscribe to either list, send a message to
sympa@linux-mandrake.com
with "subscribe [listname]" in the body of the message.
To remove yourself from either list, send a message to
sympa@linux-mandrake.com
with "unsubscribe [listname]" in the body of the message.
To get more information on either list, send a message to
sympa@linux-mandrake.com
with "info [listname]" in the body of the message.
Optionally, you can use the web interface to subscribe to or unsubscribe
from either list:
http://www.linux-mandrake.com/en/flists.php3#security
________________________________________________________________________
Type Bits/KeyID Date User ID
pub 1024D/22458A98 2000-07-10 Linux Mandrake Security Team
<security@linux-mandrake.com>
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