(Debian Issues Revised Fix) 'mime-support' Insecure Temporary File Lets Local Users Gain Elevated Privileges
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SecurityTracker Alert ID: 1006643
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CVE Reference: CAN-2003-0214
(Links to External Site)
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Updated: Apr 4 2004
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Original Entry Date: Apr 24 2003
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Impact: Modification of system information, Root access via local system, User access via local system
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Fix Available: Yes
Vendor Confirmed: Yes
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Version(s): 2.2, 3.0
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Description: A vulnerability has been reported in 'mime-support'. A local user can gain elevated privileges on the system.
Debian reported that the software creates temporary files in an unsafe manner. A local user could create a symbolic link from the
temporary file to another critical file on the server. Then, when an application using mime-support (e.g., mailcap) is executed,
the application may overwrite the linked file with the privileges of the user running the application. This could allow a local
user to obtain elevated privileges, potentially including root privileges.
Debian credits Colin Phipps with discovery.
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Impact: A local user could obtain elevated privileges on the system, possibly including root privileges, depending on the application using mime-support.
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Solution: Debian has released a revised fix in version 3.18-1.2 for the stable distribution (woody) and in version 3.9-1.2 for the old stable
distribution (potato). Do not use the previous fixes for these distributions.
For the unstable distribution (sid), the fix is
provided in version 3.22-1 (as previously reported in DSA 292-1).
Debian GNU/Linux 2.2 alias potato:
Source archives:
http://security.debian.org/pool/updates/main/m/mime-support/mime-support_3.9-1.2.dsc
Size/MD5 checksum: 473 aee5059f79f23a3a87bae000d4be1d3e
http://security.debian.org/pool/updates/main/m/mime-support/mime-support_3.9-1.2.tar.gz
Size/MD5 checksum: 91752 65c98a8e86529662af082682eca108ae
Architecture independent components:
http://security.debian.org/pool/updates/main/m/mime-support/mime-support_3.9-1.2_all.deb
Size/MD5 checksum: 99198 97ca84b5ade9137cbba38fc05a14bdff
Debian GNU/Linux 3.0 alias woody:
Source archives:
http://security.debian.org/pool/updates/main/m/mime-support/mime-support_3.18-1.2.dsc
Size/MD5 checksum: 475 7a83acdfcdcb2a128ebc2de347ad51c8
http://security.debian.org/pool/updates/main/m/mime-support/mime-support_3.18-1.2.tar.gz
Size/MD5 checksum: 72215 df544f4173db71ddbead9c61a8e9b3b5
Architecture independent components:
http://security.debian.org/pool/updates/main/m/mime-support/mime-support_3.18-1.2_all.deb
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Vendor URL: packages.debian.org/stable/net/mime-support.html (Links to External Site)
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Cause: Access control error, State error
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Underlying OS: Linux (Debian)
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Reported By: joey@infodrom.org (Martin Schulze)
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Message History:
This archive entry is a follow-up to the message listed below.
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Source Message Contents
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Date: Wed, 23 Apr 2003 15:48:48 +0200 (CEST)
From: joey@infodrom.org (Martin Schulze)
Subject: [SECURITY] [DSA 292-2] New mime-support packages fix temporary file race conditions
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-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1
- --------------------------------------------------------------------------
Debian Security Advisory DSA 292-2 security@debian.org
http://www.debian.org/security/ Martin Schulze
April 23rd, 2003 http://www.debian.org/security/faq
- --------------------------------------------------------------------------
Package : mime-support
Vulnerability : insecure temporary file creation
Problem-Type : local
Debian-specific: no
Unfortunately yesterday's update for mime-support did not exactly work
as expected, which requires an update. For completeness we include
the advisory text:
Colin Phipps discovered several problems in mime-support, that contains
support programs for the MIME control files 'mime.types' and 'mailcap'.
When a temporary file is to be used it is created insecurely, allowing
an attacker to overwrite arbitrary under the user id of the person
executing run-mailcap, most probably root. Additionally the program did
not properly escape shell escape characters when executing a command.
This is unlikely to be exploitable, though.
For the stable distribution (woody) these problems have been fixed in
version 3.18-1.2.
For the old stable distribution (potato) these problems have been
fixed in version 3.9-1.2.
For the unstable distribution (sid) these problems have been
fixed in version 3.22-1 (same as DSA 292-1).
We recommend that you upgrade your mime-support packages.
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 2.2 alias potato
- ---------------------------------
Source archives:
http://security.debian.org/pool/updates/main/m/mime-support/mime-support_3.9-1.2.dsc
Size/MD5 checksum: 473 aee5059f79f23a3a87bae000d4be1d3e
http://security.debian.org/pool/updates/main/m/mime-support/mime-support_3.9-1.2.tar.gz
Size/MD5 checksum: 91752 65c98a8e86529662af082682eca108ae
Architecture independent components:
http://security.debian.org/pool/updates/main/m/mime-support/mime-support_3.9-1.2_all.deb
Size/MD5 checksum: 99198 97ca84b5ade9137cbba38fc05a14bdff
Debian GNU/Linux 3.0 alias woody
- --------------------------------
Source archives:
http://security.debian.org/pool/updates/main/m/mime-support/mime-support_3.18-1.2.dsc
Size/MD5 checksum: 475 7a83acdfcdcb2a128ebc2de347ad51c8
http://security.debian.org/pool/updates/main/m/mime-support/mime-support_3.18-1.2.tar.gz
Size/MD5 checksum: 72215 df544f4173db71ddbead9c61a8e9b3b5
Architecture independent components:
http://security.debian.org/pool/updates/main/m/mime-support/mime-support_3.18-1.2_all.deb
These files will probably be moved into the stable distribution on
its next revision.
- ---------------------------------------------------------------------------------
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: debian-security-announce@lists.debian.org
Package info: `apt-cache show <pkg>' and http://packages.debian.org/<pkg>
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