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AUSCERT External Security Bulletin Redistribution
USN-4080-1: OpenJDK 8 vulnerabilities
31 July 2019
AusCERT Security Bulletin Summary
Operating System: Ubuntu
Impact/Access: Modify Arbitrary Files -- Remote with User Interaction
Denial of Service -- Remote/Unauthenticated
Access Confidential Data -- Remote with User Interaction
CVE Names: CVE-2019-7317 CVE-2019-2842 CVE-2019-2816
CVE-2019-2786 CVE-2019-2769 CVE-2019-2762
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USN-4080-1: OpenJDK 8 vulnerabilities
31 July 2019
A security issue affects these releases of Ubuntu and its derivatives:
o Ubuntu 16.04 LTS
Several security issues were fixed in OpenJDK.
o openjdk-8 - Open Source Java implementation
Keegan Ryan discovered that the ECC implementation in OpenJDK was not
sufficiently resilient to side-channel attacks. An attacker could possibly use
this to expose sensitive information. (CVE-2019-2745)
It was discovered that OpenJDK did not sufficiently validate serial streams
before deserializing suppressed exceptions in some situations. An attacker
could use this to specially craft an object that, when deserialized, would
cause a denial of service. (CVE-2019-2762)
It was discovered that in some situations OpenJDK did not properly bound the
amount of memory allocated during object deserialization. An attacker could use
this to specially craft an object that, when deserialized, would cause a denial
of service (excessive memory consumption). (CVE-2019-2769)
It was discovered that OpenJDK did not properly restrict privileges in certain
situations. An attacker could use this to specially construct an untrusted Java
application or applet that could escape sandbox restrictions. (CVE-2019-2786)
Jonathan Birch discovered that the Networking component of OpenJDK did not
properly validate URLs in some situations. An attacker could use this to bypass
restrictions on characters in URLs. (CVE-2019-2816)
Nati Nimni discovered that the Java Cryptography Extension component in OpenJDK
did not properly perform array bounds checking in some situations. An attacker
could use this to cause a denial of service. (CVE-2019-2842)
It was discovered that OpenJDK incorrectly handled certain memory operations.
If a user or automated system were tricked into opening a specially crafted PNG
file, a remote attacker could use this issue to cause OpenJDK to crash,
resulting in a denial of service, or possibly execute arbitrary code.
The problem can be corrected by updating your system to the following package
Ubuntu 16.04 LTS
openjdk-8-jdk - 8u222-b10-1ubuntu1~16.04.1
openjdk-8-jdk-headless - 8u222-b10-1ubuntu1~16.04.1
openjdk-8-jre - 8u222-b10-1ubuntu1~16.04.1
openjdk-8-jre-headless - 8u222-b10-1ubuntu1~16.04.1
openjdk-8-jre-jamvm - 8u222-b10-1ubuntu1~16.04.1
openjdk-8-jre-zero - 8u222-b10-1ubuntu1~16.04.1
To update your system, please follow these instructions: https://
This update uses a new upstream release, which includes additional bug fixes.
After a standard system update you need to restart any Java applications or
applets to make all the necessary changes.
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