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July 18, 2017
The full version string for this update release is 1.7.0_151-b15 (where "b" means "build"). The version number is 7u151.
JDK 7u151 contains IANA time zone data version 2017b. For more information, refer to Timezone Data Versions in the JRE Software.
The security baselines for the Java Runtime Environment (JRE) at the time of the release of JDK 7u151 are specified in the following table:
|JRE Family Version||JRE Security Baseline (Full Version String)|
The JRE expires whenever a new release with security vulnerability fixes becomes available. Critical patch updates, which contain security vulnerability fixes, are announced one year in advance on Critical Patch Updates, Security Alerts and Third Party Bulletin. This JRE (version 7u151) will expire with the release of the next critical patch update scheduled for October 17, 2017.
For systems unable to reach the Oracle Servers, a secondary mechanism expires this JRE (version 7u151) on November 17, 2017. After either condition is met (new release becoming available or expiration date reached), the JRE will provide additional warnings and reminders to users to update to the newer version. For more information, see JRE Expiration Date.
JAR file validation changes
After upgrading to the JDK July CPU release (8u141/7u151/6u161), when executing Java Webstart applications, customers may encounter an exception like
“java.lang.SecurityException: digest missing for …” that prevents the application from loading.
The issue is observed in signed JAR files whose manifest contains package version information and does not have a trailing
"/" in the name of the package (e.g.: Name:
org/apache/xml/resolver). While we work towards resolving this issue, in the interim, users can work-around the issue as follows:
NOTE: We recommend use of this workaround only if the distributor of the JAR files can "re-sign" the JAR files.
jar xf jar-file).
/” to the name of the package ( e.g.: Name:
rm -f META-INF/*.SF META-INF/*.RSA META-INF/*.DSA).
jar cfm jar-file META-INF/MANIFEST.MF input-file(s)).
NOTE: You must use the
jar utility. Do not use other JAR creation tools.
New Let's Encrypt certificates added to root CAs
One new root certificate has been added:
ISRG Root X1 alias: letsencryptisrgx1 DN: CN=ISRG Root X1, O=Internet Security Research Group, C=US
JDK-8177539 (not public)
Disable SHA-1 TLS Server Certificates
Any TLS server certificate chain containing a SHA-1 certificate (end-entity or intermediate CA) and anchored by a root CA certificate included by default in Oracle's JDK is now blocked by default. TLS Server certificate chains that are anchored by enterprise or private CAs are not affected. Only X.509 certificate chains that are validated by the
PKIX implementation of the
CertPathBuilder APIs and the
PKIX implementations of the
TrustManagerFactory API are subject to the restrictions. Third-party implementations of these APIs are directly responsible for enforcing their own restrictions.
To implement this restriction and provide more flexibility for configuring your own restrictions, additional features have been added to the
jdk.jar.disabledAlgorithms Security Properties in the
java.security file, as follows:
Three new constraints have been added to this Security Property:
A new constraint named
jdkCA, that when set, restricts the algorithm if it is used in a certificate chain that is anchored by a trust anchor that is pre-installed in the JDK cacerts keystore. This condition does not apply to certificate chains that are anchored by other certificates, including those that are subsequently added to the cacerts keystore. Also, note that the restriction does not apply to trust anchor certificates, since they are directly trusted.
A new constraint named
denyAfter, that when set, restricts the algorithm if it is used in a certificate chain after the specified date. The restriction does not apply to trust anchor certificates, since they are directly trusted. Also, code signing certificate chains as used in signed JARs are treated specially as follows:
A new constraint named
usage, that when set, restricts the algorithm if it is used in a certificate chain for the specified use(s). Three usages are initially supported:
TLSServer for TLS/SSL server certificate chains,
TLSClient for TLS/SSL client certificate chains, and
SignedJAR for certificate chains used with signed JARs.
Multiple constraints can be combined to constrain an algorithm when delimited by '&'. For example, to disable SHA-1 TLS Server certificate chains that are anchored by pre-installed root CAs, the constraint is "SHA1 jdkCA & usage TLSServer".
A new constraint has been added named
denyAfter, that when set, restricts the algorithm if it is used in a signed JAR after the specified date, as follows:
if the JAR is not timestamped, it will be restricted (treated as unsigned) after the specified date
if the JAR is timestamped, it will not be restricted if it is timestamped before the specified date. If the JAR is timestamped after the specified date, it will be restricted.
For example, to restrict SHA1 in JAR files signed after January 1st 2018, add the following to the property: "SHA1 denyAfter 2018-01-01". The syntax is the same as the certpath property, however certificate checking will not be performed by this property.
JMX Diagnostic improvements
com.sun.management.HotSpotDiagnostic::dumpHeap API is modified to throw IllegalArgumentException if the supplied file name does not end with “.hprof” suffix. Existing applications which do not provide a file name ending with the “.hprof” extension will fail with IllegalArgumentException. In that case, applications can either choose to handle the exception or restore old behaviour by setting system property 'jdk.management.heapdump.allowAnyFileSuffix' to true.
JDK-8176055 (not public)
Tighter secure checks on processing WSDL files by wsimport tool
The wsimport tool has been changed to disallow DTDs in Web Service descriptions, specifically:
To restore the previous behavior:
NOTE: JDK 7 and JDK 6 support for this option in wsimport will be provided via a Patch release post July CPU
JDK-8182054 (not public)
This release contains fixes for security vulnerabilities described in the Oracle Java SE Critical Patch Update Advisory. For a more complete list of the bug fixes included in this release, see the JDK 7u151 Bug Fixes page.