A new update is available for Fedora Core - [SECURITY] Fedora Core 4 Update: squid-2.5.STABLE9-8. Here the announcement:

Fedora Update Notification
FEDORA-2005-851
2005-09-06
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Product : Fedora Core 4
Name : squid
Version : 2.5.STABLE9
Release : 8
Summary : The Squid proxy caching server.
Description :
Squid is a high-performance proxy caching server for Web clients,
supporting FTP, gopher, and HTTP data objects. Unlike traditional
caching software, Squid handles all requests in a single,
non-blocking, I/O-driven process. Squid keeps meta data and especially
hot objects cached in RAM, caches DNS lookups, supports non-blocking
DNS lookups, and implements negative caching of failed requests.

Squid consists of a main server program squid, a Domain Name System
lookup program (dnsserver), a program for retrieving FTP data
(ftpget), and some management and client tools.

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* Tue Sep 6 2005 Martin Stransky <stransky@redhat.com> 7:2.5.STABLE9-8
- Three upstream patches for #167414
- Spanish and Greek messages
- patch for -D_FORTIFY_SOURCE=2


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This update can be downloaded from:
http://download.fedora.redhat.com/pub/fedora/linux/core/updates/4/

84ffacd1861487183b380b9d10eaefad SRPMS/squid-2.5.STABLE9-8.src.rpm
e3edef9bb8a108f14a5320adc5bb4911 ppc/squid-2.5.STABLE9-8.ppc.rpm
1a40db4808c6b8275294b7958ee7efec ppc/debug/squid-debuginfo-2.5.STABLE9-8.ppc.rpm
1663acd75c2347126210263fb1b39143 x86_64/squid-2.5.STABLE9-8.x86_64.rpm
8f982a06009db83614118735e2efff27 x86_64/debug/squid-debuginfo-2.5.STABLE9-8.x86_64.rpm
3ea7ad95299b212639ee90cc28b2156b i386/squid-2.5.STABLE9-8.i386.rpm
0e5412ed95b927f1a3d20a3a1fbcd555 i386/debug/squid-debuginfo-2.5.STABLE9-8.i386.rpm

This update can also be installed with the Update Agent; you can
launch the Update Agent with the 'up2date' command.