RHEL 3 / 4 / 5 : java-1.4.2-ibm (RHSA-2010:0155)
Medium Nessus Plugin ID 46272
SynopsisThe remote Red Hat host is missing one or more security updates.
DescriptionUpdated java-1.4.2-ibm packages that fix one security issue and a bug are now available for Red Hat Enterprise Linux 3 Extras, Red Hat Enterprise Linux 4 Extras, and Red Hat Enterprise Linux 5 Supplementary.
The Red Hat Security Response Team has rated this update as having moderate security impact. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available from the CVE link in the References section.
The IBM 1.4.2 SR13-FP4 Java release includes the IBM Java 2 Runtime Environment and the IBM Java 2 Software Development Kit.
A flaw was found in the way the TLS/SSL (Transport Layer Security/Secure Sockets Layer) protocols handle session renegotiation.
A man-in-the-middle attacker could use this flaw to prefix arbitrary plain text to a client's session (for example, an HTTPS connection to a website). This could force the server to process an attacker's request as if authenticated using the victim's credentials.
This update disables renegotiation in the non-default IBM JSSE2 provider for the Java Secure Socket Extension (JSSE) component. The default JSSE provider is not updated with this fix. Refer to the IBMJSSE2 Provider Reference Guide, linked to in the References, for instructions on how to configure the IBM Java 2 Runtime Environment to use the JSSE2 provider by default.
When using the JSSE2 provider, unsafe renegotiation can be re-enabled using the com.ibm.jsse2.renegotiate property. Refer to the following Knowledgebase article for details:
This update also fixes the following bug :
* the libjaasauth.so file was missing from the java-1.4.2-ibm packages for the Intel Itanium architecture (.ia64.rpm). This update adds the file to the packages for the Itanium architecture, which resolves this issue. (BZ#572577)
All users of java-1.4.2-ibm are advised to upgrade to these updated packages, which contain the IBM 1.4.2 SR13-FP4 Java release. All running instances of IBM Java must be restarted for this update to take effect.
SolutionUpdate the affected packages.