RHSA-2016:0446 - Security Advisory

Topic

Updated packages that fix several OpenSSL security issues are available for
Red Hat JBoss Web Server 3.0.2 for Microsoft Windows and Solaris.

Red Hat Product Security has rated this update as having Important security
impact. Common Vulnerability Scoring System (CVSS) base scores, which give
detailed severity ratings, are available for each vulnerability from the
CVE links in the References section.

Description

Red Hat JBoss Web Server is a fully integrated and certified set of
components for hosting Java web applications. It is comprised of the
Apache HTTP Server, the Apache Tomcat Servlet container, Apache Tomcat
Connector (mod_jk), JBoss HTTP Connector (mod_cluster), Hibernate, and
the Tomcat Native library.

A padding oracle flaw was found in the Secure Sockets Layer version 2.0
(SSLv2) protocol. An attacker could potentially use this flaw to decrypt
RSA-encrypted cipher text from a connection using a newer SSL/TLS protocol
version, allowing them to decrypt such connections. This cross-protocol
attack is publicly referred to as DROWN. (CVE-2016-0800)

A denial of service flaw was found in the way OpenSSL handled SSLv2
handshake messages. A remote attacker could use this flaw to cause a
TLS/SSL server using OpenSSL to exit on a failed assertion if it had both
the SSLv2 protocol and EXPORT-grade cipher suites enabled. (CVE-2015-0293)

A flaw was found in the way malicious SSLv2 clients could negotiate SSLv2
ciphers that were disabled on the server. This could result in weak
SSLv2 ciphers being used for SSLv2 connections, making them vulnerable to
man-in-the-middle attacks. (CVE-2015-3197)

Red Hat would like to thank the OpenSSL project for reporting these issues.
Upstream acknowledges Nimrod Aviram and Sebastian Schinzel as the original
reporters of CVE-2016-0800 and CVE-2015-3197; and Sean Burford (Google)
and Emilia Käsper (OpenSSL development team) as the original reporters of
CVE-2015-0293.

Users of Red Hat JBoss Web Server 3.0.2 are advised to upgrade to these
updated packages which fix these issues. The Red Hat JBoss Web Server
process must be restarted for the update to take effect.

Solution

Before applying this update, make sure all previously released errata
relevant to your system have been applied, and back up your existing Red
Hat JBoss Web Server installation (including all applications and
configuration files).

For details on how to apply this update, refer to:
https://access.redhat.com/articles/11258

Affected Products

• JBoss Enterprise Web Server Text-Only Advisories x86_64

Fixes

• BZ - 1202404 - CVE-2015-0293 openssl: assertion failure in SSLv2 servers
• BZ - 1301846 - CVE-2015-3197 OpenSSL: SSLv2 doesn't block disabled ciphers
• BZ - 1310593 - CVE-2016-0800 SSL/TLS: Cross-protocol attack on TLS using SSLv2 (DROWN)

CVEs

• CVE-2015-0293
• CVE-2015-3197
• CVE-2016-0800

References

• https://access.redhat.com/security/updates/classification/#important
• https://access.redhat.com/jbossnetwork/restricted/listSoftware.html?product=webserver&downloadType=securityPatches&version=3.0.2