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AUSCERT External Security Bulletin Redistribution
ESB-2000.254 -- FreeBSD-SA-00:50
listmanager port allows local root compromise
14 September 2000
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AusCERT Security Bulletin Summary
---------------------------------
Product: listmanager
Vendor: FreeBSD Ports Collection
Operating System: FreeBSD
Linux
Unix
Platform: N/A
Impact: Root Compromise
Access Required: Local
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FreeBSD-SA-00:50 Security Advisory
FreeBSD, Inc.
Topic: listmanager port allows local root compromise
Category: ports
Module: listmanager
Announced: 2000-09-13
Affects: Ports collection.
Corrected: 2000-09-08
Credits: Discovered during internal auditing
Vendor status: Updated version released.
FreeBSD only: NO
I. Background
Listmanager is a mailing list manager.
II. Problem Description
The listmanager port, versions prior to 2.105.1, contained several
locally exploitable buffer overflow vulnerabilities which could be
used to gain root privileges.
Since the source code to listmanager is not available, it is difficult
to determine whether there are remaining security vulnerabilities, or
whether the software was previously exploitable remotely, but we
believe the author has made a good faith effort to improve the
security of the code.
The listmanager port is not installed by default, nor is it "part of
FreeBSD" as such: it is part of the FreeBSD ports collection, which
contains over 3800 third-party applications in a ready-to-install
format. The ports collections shipped with FreeBSD 4.1 and 3.5.1
contain this problem since it was discovered after the releases.
FreeBSD makes no claim about the security of these third-party
applications, although an effort is underway to provide a security
audit of the most security-critical ports.
III. Impact
Unprivileged users can obtain root privileges on the local system.
If you have not chosen to install the listmanager port/package, then
your system is not vulnerable to this problem.
IV. Workaround
Deinstall the listmanager port/package, if you have installed it.
V. Solution
One of the following:
1) Upgrade your entire ports collection and rebuild the listmanager port.
2) Deinstall the old package and install a new package dated after the
correction date, obtained from:
ftp://ftp.FreeBSD.org/pub/FreeBSD/ports/i386/packages-3-stable/mail/listmanager-2.105.1.tgz
ftp://ftp.FreeBSD.org/pub/FreeBSD/ports/i386/packages-4-stable/mail/listmanager-2.105.1.tgz
ftp://ftp.FreeBSD.org/pub/FreeBSD/ports/alpha/packages-4-stable/mail/listmanager-2.105.1.tgz
ftp://ftp.FreeBSD.org/pub/FreeBSD/ports/i386/packages-5-current/mail/listmanager-2.105.1.tgz
ftp://ftp.FreeBSD.org/pub/FreeBSD/ports/alpha/packages-5-current/mail/listmanager-2.105.1.tgz
NOTE: It may be several days before updated packages are available.
3) download a new port skeleton for the listmanager port from:
http://www.freebsd.org/ports/
and use it to rebuild the port.
4) Use the portcheckout utility to automate option (3) above. The
portcheckout port is available in /usr/ports/devel/portcheckout or the
package can be obtained from:
ftp://ftp.FreeBSD.org/pub/FreeBSD/ports/i386/packages-3-stable/devel/portcheckout-2.0.tgz
ftp://ftp.FreeBSD.org/pub/FreeBSD/ports/i386/packages-4-stable/devel/portcheckout-2.0.tgz
ftp://ftp.FreeBSD.org/pub/FreeBSD/ports/alpha/packages-4-stable/devel/portcheckout-2.0.tgz
ftp://ftp.FreeBSD.org/pub/FreeBSD/ports/i386/packages-5-current/devel/portcheckout-2.0.tgz
ftp://ftp.FreeBSD.org/pub/FreeBSD/ports/alpha/packages-5-current/devel/portcheckout-2.0.tgz
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