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AUSCERT External Security Bulletin Redistribution
13 September 2018
AusCERT Security Bulletin Summary
Operating System: Ubuntu
Impact/Access: Execute Arbitrary Code/Commands -- Remote with User Interaction
Access Confidential Data -- Remote/Unauthenticated
Denial of Service -- Remote/Unauthenticated
CVE Names: CVE-2018-2972 CVE-2018-2952 CVE-2018-2826
Revision History: September 13 2018: USN-3747-1 introduced a regression
in OpenJDK 10.
August 22 2018: Initial Release
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Ubuntu Security Notice USN-3747-2
September 12, 2018
A security issue affects these releases of Ubuntu and its derivatives:
- - Ubuntu 18.04 LTS
USN-3747-1 introduced a regression in OpenJDK 10.
- - openjdk-lts: Open Source Java implementation
USN-3747-1 fixed vulnerabilities in OpenJDK 10 for Ubuntu 18.04 LTS.
Unfortunately, that update introduced a regression around accessability
support that prevented some Java applications from starting.
This update fixes the problem.
We apologize for the inconvenience.
Original advisory details:
It was discovered that OpenJDK did not properly validate types in some
situations. An attacker could use this to construct a Java class that could
possibly bypass sandbox restrictions. (CVE-2018-2825, CVE-2018-2826)
It was discovered that the PatternSyntaxException class in OpenJDK did not
properly validate arguments passed to it. An attacker could use this to
potentially construct a class that caused a denial of service (excessive
memory consumption). (CVE-2018-2952)
Daniel Bleichenbacher discovered a vulnerability in the Galois/Counter Mode
(GCM) mode of operation for symmetric block ciphers in OpenJDK. An attacker
could use this to expose sensitive information. (CVE-2018-2972)
The problem can be corrected by updating your system to the following
Ubuntu 18.04 LTS:
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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