Buffer overflow in UW imap daemon

The UW imap daemon contains a buffer overflow which allows a
logged in, remote user to execute commands on the server
with the user's UID/GID.

[Updated 16 April 2003]
Added packages for Red Hat Linux on IBM iSeries and pSeries systems.

UW imapd is an IMAP daemon from the University of Washington. Version
2000c and previous versions have a bug that allows a malicious user to
construct a malformed request which overflows an internal buffer, enabling
that user to execute commands on the server with the user's UID/GID.

To exploit this problem the user has to have successfully authenticated to
the imapd service. Therefore, this vulnerability mainly affects free email
providers or mail servers where the user has no shell access to the system.
On other systems, in which the user already has shell access, users can
already run commands under their own UIDs/GIDs.

The Common Vulnerabilities and Exposures project (cve.mitre.org) has
assigned the name CAN-2002-0379 to this issue.

Users of imapd are advised to upgrade to these errata packages containing
version 2001a of imapd. They are not vulnerable to this issue.

Before applying this update, make sure all previously released errata
relevant to your system have been applied.

To update all RPMs for your particular architecture, run:

rpm -Fvh [filenames]

where [filenames] is a list of the RPMs you wish to upgrade. Only those
RPMs which are currently installed will be updated. Those RPMs which are
not installed but included in the list will not be updated. Note that you
can also use wildcards (*.rpm) if your current directory *only* contains the
desired RPMs.

Please note that this update is also available via Red Hat Network. Many
people find this an easier way to apply updates. To use Red Hat Network,
launch the Red Hat Update Agent with the following command:

up2date

This will start an interactive process that will result in the appropriate
RPMs being upgraded on your system.

http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2002-0379
http://marc.theaimsgroup.com/?l=bugtraq&m=102107222100529

buffer, imap, overflow, UW, uw-imap, wu-imap