Updated Fetchmail packages fix security vulnerabilities

Updated Fetchmail packages that close a number of vulnerabilities are
available for Red Hat Linux on IBM iSeries and pSeries systems.

Fetchmail is a remote mail retrieval and forwarding utility intended for
use over on-demand TCP/IP links such as SLIP and PPP connections. Three
bugs have been found in the header parsing code in Fetchmail versions
prior to 6.2.0:

A heap-based buffer overflow in Fetchmail 6.1.3 and earlier does not
account for the "@" character when determining buffer lengths for local
addresses, which allows remote attackers to execute arbitrary code via a
header with a large number of local addresses.

Buffer overflows in Fetchmail 6.0.0 and earlier allow remote attackers to
cause a denial of service (crash) or execute arbitrary code via long
headers that are not properly processed by the readheaders function, or
via long Received: headers, which are not properly parsed by the
parse_received function.

The getmxrecord function in Fetchmail 6.0.0 and earlier does not properly
check the boundary of a particular malformed DNS packet from a malicious
DNS server, which allows remote attackers to cause a denial of service
(crash) when Fetchmail attempts to read data beyond the expected boundary.

All users of Fetchmail are advised to upgrade to the errata packages
containing a backported fix, which is not vulnerable to these issues.

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-2002-1174
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2002-1175
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2002-1365
http://tuxedo.org/~esr/fetchmail/NEWS
http://security.e-matters.de/advisories/052002.html
http://security.e-matters.de/advisories/032002.html
http://www.kb.cert.org/vuls/id/738331

fetchmail, multidrop, remote