Security Advisory Important: java-1.5.0-sun security update

Advisory: RHSA-2007:0963-5
Type: Security Advisory
Severity: Important
Issued on: 2007-10-12
Last updated on: 2007-10-12
Affected Products: RHEL Desktop Supplementary (v. 5 client)
RHEL Supplementary (v. 5 server)
Red Hat Enterprise Linux Extras (v. 4)
CVEs ( CVE-2007-5232


Updated java-1.5.0-sun packages that correct several security issues are
now available for Red Hat Enterprise Linux 4 Extras and 5 Supplementary.

This update has been rated as having important security impact by the Red
Hat Security Response Team.

The Java Runtime Environment (JRE) contains the software and tools
that users need to run applets and applications written using the Java
programming language.

A flaw in the applet caching mechanism of the Java Runtime Environment
(JRE) did not correctly process the creation of network connections. A
remote attacker could use this flaw to create connections to
services on machines other than the one that the applet was downloaded
from. (CVE-2007-5232)

Multiple vulnerabilities existed in Java Web Start allowing an untrusted
application to determine the location of the Java Web Start cache.

Untrusted Java Web Start Applications or Java Applets were able to drag and
drop a file to a Desktop Application. A user-assisted remote attacker could
use this flaw to move or copy arbitrary files. (CVE-2007-5239)

The Java Runtime Environment (JRE) allowed untrusted Java Applets or
applications to display oversized Windows. This could be used by remote
attackers to hide security warning banners. (CVE-2007-5240)

Unsigned Java Applets communicating via a HTTP proxy could allow a remote
attacker to violate the Java security model. A cached, malicious Applet
could create network connections to services on other machines.

Unsigned Applets loaded with Mozilla Firefox or Opera browsers allowed
remote attackers to violate the Java security model. A cached, malicious
Applet could create network connections to services on other machines.

In Red Hat Enterprise Linux a Java Web Start application requesting
elevated permissions is only started automatically when signed with a
trusted code signing certificate and otherwise requires user confirmation
to access privileged resources.

All users of java-sun-1.5.0 should upgrade to these packages, which contain
Sun Java 1.5.0 Update 13 that corrects these issues.

Please note that during our quality testing we discovered that the Java
browser plug-in may not function perfectly when visiting some sites that
make use of multiple applets on a single HTML page. We have verified that
this issue is not due to our packaging and affects Sun Java 1.5.0 Update 13.


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

This update is available via Red Hat Network. Details on how to use
the Red Hat Network to apply this update are available at

Updated packages

(The unlinked packages above are only available from the Red Hat Network)

Bugs fixed (see bugzilla for more information)

321951 - CVE-2007-5232 Security Vulnerability in Java Runtime Environment With Applet Caching
321961 - CVE-2007-5238 Vulnerabilities in Java Web Start allow to determine the location of the Java Web Start cache
321981 - CVE-2007-5239 Untrusted Application or Applet May Move or Copy Arbitrary Files
321991 - CVE-2007-5240 Applets or Applications are allowed to display an oversized window
324351 - CVE-2007-5273 Anti-DNS Pinning and Java Applets with HTTP proxy
324361 - CVE-2007-5274 Anti-DNS Pinning and Java Applets with Opera and Firefox


These packages are GPG signed by Red Hat for security. Our key and details on how to verify the signature are available from:

The Red Hat security contact is More contact details at