A flaw was discovered in the SSL/TLS in JSSE component of OpenJDK, that allows malicious clients to make an SSL/TLS server use an excessive amount of CPU time by repeatedly sending ClientHello packets. Client can send pre-generated packet, causing the server to repeatedly perform expensive computations when generating ServerHello response. This flaw is similar to OpenSSL CVE-2011-4619 (bug #771780), but the problem does not seem to be caused by an attempt to support server gated cryptography (SGC) and rather seems to be caused by an incorrect enforcing of the packet order during the SSL/TLS protocol handshake. Note that the attacker needs to keep connection open and keep re-sending ClientHello packets to keep server busy.
Public now via Oracle Java CPU Feb 2013. Fixed in Oracle Java SE 7 Update 13 and 6 Update 39. External Reference: http://www.oracle.com/technetwork/topics/security/javacpufeb2013-1841061.html
Upstream commit, as included in IcedTea7 repositories: http://icedtea.classpath.org/hg/release/icedtea7-forest-2.3/jdk/rev/5c1e8b779c65
This issue has been addressed in following products: Supplementary for Red Hat Enterprise Linux 5 Supplementary for Red Hat Enterprise Linux 6 Via RHSA-2013:0237 https://rhn.redhat.com/errata/RHSA-2013-0237.html
This issue has been addressed in following products: Supplementary for Red Hat Enterprise Linux 5 Supplementary for Red Hat Enterprise Linux 6 Via RHSA-2013:0236 https://rhn.redhat.com/errata/RHSA-2013-0236.html
This issue has been addressed in following products: Red Hat Enterprise Linux 5 Via RHSA-2013:0246 https://rhn.redhat.com/errata/RHSA-2013-0246.html
This issue has been addressed in following products: Red Hat Enterprise Linux 5 Red Hat Enterprise Linux 6 Via RHSA-2013:0247 https://rhn.redhat.com/errata/RHSA-2013-0247.html
This issue has been addressed in following products: Red Hat Enterprise Linux 6 Via RHSA-2013:0245 https://rhn.redhat.com/errata/RHSA-2013-0245.html
Fixed in upstream IcedTea versions IcedTea6 1.11.6, and 1.12.1, and IcedTea7 2.1.5, 2.2.5, and 2.3.6: http://mail.openjdk.java.net/pipermail/distro-pkg-dev/2013-February/021708.html http://mail.openjdk.java.net/pipermail/distro-pkg-dev/2013-February/021728.html http://mail.openjdk.java.net/pipermail/distro-pkg-dev/2013-February/021905.html http://mail.openjdk.java.net/pipermail/distro-pkg-dev/2013-February/021876.html Note that version 2.3.5 was tagged in upstream mercurial including the security fixes, but was not released. Only 2.3.6 was released, correcting problem introduced by security patches as included in 2.3.5.
This issue has been addressed in following products: Supplementary for Red Hat Enterprise Linux 5 Supplementary for Red Hat Enterprise Linux 6 Via RHSA-2013:0624 https://rhn.redhat.com/errata/RHSA-2013-0624.html
This issue has been addressed in following products: Supplementary for Red Hat Enterprise Linux 5 Supplementary for Red Hat Enterprise Linux 6 Via RHSA-2013:0626 https://rhn.redhat.com/errata/RHSA-2013-0626.html
This issue has been addressed in following products: Supplementary for Red Hat Enterprise Linux 5 Supplementary for Red Hat Enterprise Linux 6 Via RHSA-2013:0625 https://rhn.redhat.com/errata/RHSA-2013-0625.html
This issue has been addressed in following products: Red Hat Network Satellite Server v 5.5 Via RHSA-2013:1456 https://rhn.redhat.com/errata/RHSA-2013-1456.html
This issue has been addressed in following products: Red Hat Network Satellite Server v 5.4 Via RHSA-2013:1455 https://rhn.redhat.com/errata/RHSA-2013-1455.html