Red Hat alert: Updated elm packages fix vulnerability in frm command

Posted by dave on Jan 14, 2004 8:25 AM EDT
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Updated elm packages are now available that fix a buffer overflow vulnerability in the 'frm' command.

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- --------------------------------------------------------------------- Red Hat Security Advisory

Synopsis: Updated elm packages fix vulnerability in frm command Advisory ID: RHSA-2004:009-01 Issue date: 2004-01-07 Updated on: 2004-01-08 Product: Red Hat Enterprise Linux Keywords: electronic mailer Cross references: Obsoletes: CVE Names: CAN-2003-0966 - ---------------------------------------------------------------------

1. Topic:

Updated elm packages are now available that fix a buffer overflow vulnerability in the 'frm' command.

2. Relevant releases/architectures:

Red Hat Enterprise Linux AS (Advanced Server) version 2.1 - i386, ia64 Red Hat Linux Advanced Workstation 2.1 - ia64

3. Problem description:

Elm is a terminal mode email user agent. The frm command is provided as part of the Elm packages and gives a summary list of the sender and subject of selected messages in a mailbox or folder.

A buffer overflow vulnerability was found in the frm command. An attacker could create a message with an overly long Subject line such that when the frm command is run by a victim arbitrary code is executed. The Common Vulnerabilities and Exposures project ( has assigned the name CAN-2003-0966 to this issue.

Users of the frm command should update to these erratum packages, which contain a backported security patch that corrects this issue.

Red Hat would like to thank Paul Rubin for discovering and disclosing this issue.

4. Solution:

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:


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

If up2date fails to connect to Red Hat Network due to SSL Certificate Errors, you need to install a version of the up2date client with an updated certificate. The latest version of up2date is available from the Red Hat FTP site and may also be downloaded directly from the RHN website:

5. Bug IDs fixed ( for more info):

112078 - CAN-2003-0966 buffer overflow in frm command

6. RPMs required:

Red Hat Enterprise Linux AS (Advanced Server) version 2.1:


i386: Available from Red Hat Network: elm-2.5.6-4.i386.rpm

ia64: Available from Red Hat Network: elm-2.5.6-4.ia64.rpm

Red Hat Linux Advanced Workstation 2.1:


ia64: Available from Red Hat Network: elm-2.5.6-4.ia64.rpm

7. Verification:

MD5 sum Package Name - --------------------------------------------------------------------------

b27e2db787fc0e1ad37893bf8c2b0902 2.1AS/en/os/SRPMS/elm-2.5.6-4.src.rpm 138f4cd1e539d112680862df967e7d71 2.1AS/en/os/i386/elm-2.5.6-4.i386.rpm 40bd3722f1fcb86b3524174381daefe9 2.1AS/en/os/ia64/elm-2.5.6-4.ia64.rpm b27e2db787fc0e1ad37893bf8c2b0902 2.1AW/en/os/SRPMS/elm-2.5.6-4.src.rpm 40bd3722f1fcb86b3524174381daefe9 2.1AW/en/os/ia64/elm-2.5.6-4.ia64.rpm

These packages are GPG signed by Red Hat for security. Our key is available from

You can verify each package with the following command: rpm --checksig -v

If you only wish to verify that each package has not been corrupted or tampered with, examine only the md5sum with the following command: md5sum

8. References:

9. Contact:

The Red Hat security contact is . More contact details at

Copyright 2003 Red Hat, Inc. -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.0.7 (GNU/Linux)


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