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Home » Hacking News » RHSA-2002:047-10-Updated fetchmail packages available

RHSA-2002:047-10-Updated fetchmail packages available

by Nikola Strahija on May 21st, 2002 Updated fetchmail packages are available for Red Hat Linux 6.2, 7, 7.1, 7.2, and 7.3 which close a remotely-exploitable vulnerability in unpatched versions of fetchmail prior to 5.9.10.

2. Relevant releases/architectures:

Red Hat Linux 6.2 - alpha, i386, sparc

Red Hat Linux 7.0 - alpha, i386

Red Hat Linux 7.1 - alpha, i386, ia64

Red Hat Linux 7.2 - i386, ia64

Red Hat Linux 7.3 - i386

3. Problem description:

When retrieving mail from an IMAP server, the fetchmail e-mail client will
allocate an array to store the sizes of the messages which
it will attempt to fetch. The size of the array is determined by the
number of messages that the server claims to have. Unpatched versions of
fetchmail prior to 5.9.10 did not check whether the number of e-mails the
server claimed was too high, allowing a malicious server to cause the
fetchmail process to write data outside of the array bounds.

Users of fetchmail are advised to upgrade to this errata package which is
not vulnerable to this issue.

The Common Vulnerabilities and Exposures project ( has
assigned the name CAN-2002-0146 to 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.

5. Bug IDs fixed ( for more info):

6. RPMs required:

Red Hat Linux 6.2:





Red Hat Linux 7.0:




Red Hat Linux 7.1:





Red Hat Linux 7.2:




Red Hat Linux 7.3:



7. Verification:

MD5 sum Package Name
70060565050a75b9a8a6e4e9aab7dd13 6.2/en/os/SRPMS/fetchmail-5.9.0-9.src.rpm
f512bd03071d55a517db02c25cba1d9e 6.2/en/os/alpha/fetchmail-5.9.0-9.alpha.rpm
2d3dede8a1712a7cd9c5ae9c10f9ece1 6.2/en/os/i386/fetchmail-5.9.0-9.i386.rpm
0fb614c9246c9d592437afcee6fb5f08 6.2/en/os/i386/fetchmailconf-5.9.0-9.i386.rpm
39b791c44da50a999b605adfeb96555f 6.2/en/os/sparc/fetchmail-5.9.0-9.sparc.rpm
26a76843eaa2b1262bb2ff77cca49971 7.0/en/os/SRPMS/fetchmail-5.9.0-10.src.rpm
9027659432e3e8cba0dbe6ce4697e1b6 7.0/en/os/alpha/fetchmail-5.9.0-10.alpha.rpm
80d5dd22b14c3c35e54cfd59c4b3bb67 7.0/en/os/i386/fetchmail-5.9.0-10.i386.rpm
12569fe25e5af87071a866532f12cfce 7.0/en/os/i386/fetchmailconf-5.9.0-10.i386.rpm
26a76843eaa2b1262bb2ff77cca49971 7.1/en/os/SRPMS/fetchmail-5.9.0-10.src.rpm
9027659432e3e8cba0dbe6ce4697e1b6 7.1/en/os/alpha/fetchmail-5.9.0-10.alpha.rpm
80d5dd22b14c3c35e54cfd59c4b3bb67 7.1/en/os/i386/fetchmail-5.9.0-10.i386.rpm
12569fe25e5af87071a866532f12cfce 7.1/en/os/i386/fetchmailconf-5.9.0-10.i386.rpm
6ac74a69fb49b4df7090f4c4bd8373cf 7.1/en/os/ia64/fetchmail-5.9.0-10.ia64.rpm
158b2785e0c00afca961caac3b420572 7.1/en/os/ia64/fetchmailconf-5.9.0-10.ia64.rpm
d3f57f0c258ab404b07f6d5c6ae10c4a 7.2/en/os/SRPMS/fetchmail-5.9.0-11.src.rpm
8ac6d5614b18de67e5dd53ea8de64e16 7.2/en/os/i386/fetchmail-5.9.0-11.i386.rpm
51eeebc63b4e44bbf9de2d3ba3d408ff 7.2/en/os/i386/fetchmailconf-5.9.0-11.i386.rpm
752e5f8d77d171a5b76e4ddea9a2bb9c 7.2/en/os/ia64/fetchmail-5.9.0-11.ia64.rpm
75d869e0d7f8e507b4e942f82b9bddd8 7.2/en/os/ia64/fetchmailconf-5.9.0-11.ia64.rpm
d3f57f0c258ab404b07f6d5c6ae10c4a 7.3/en/os/SRPMS/fetchmail-5.9.0-11.src.rpm
8ac6d5614b18de67e5dd53ea8de64e16 7.3/en/os/i386/fetchmail-5.9.0-11.i386.rpm
51eeebc63b4e44bbf9de2d3ba3d408ff 7.3/en/os/i386/fetchmailconf-5.9.0-11.i386.rpm

These packages are GPG signed by Red Hat, Inc. for security. Our key
is available at:

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

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

8. References:

Copyright(c) 2000, 2001, 2002 Red Hat, Inc.

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