CVE-2019-2818
First published: Mon Jul 15 2019(Updated: )
It was discovered that the ChaCha20Cipher implementation in the Security component of OpenJDK used non-constant time comparison for comparing tags. A remote attacker could possible use the flaw to leak information about decryption state using the timing information.
Credit: secalert_us@oracle.com secalert_us@oracle.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Oracle JDK | =11.0.3 | |
| Oracle JDK | =12.0.1 | |
| Oracle JRE | =11.0.3 | |
| Oracle JRE | =12.0.1 | |
| debian/openjdk-11 | 11.0.24+8-2~deb11u1 11.0.25+9-1~deb11u1 11.0.26~6ea-1 |
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Reference Links
- http://lists.opensuse.org/opensuse-security-announce/2019-08/msg00038.html
- http://www.oracle.com/technetwork/security-advisory/cpujul2019-5072835.html
- https://usn.ubuntu.com/4083-1/
- https://launchpad.net/bugs/cve/CVE-2019-2818
- https://www.oracle.com/technetwork/security-advisory/cpujul2019-5072835.html#AppendixJAVA
- https://access.redhat.com/errata/RHSA-2019:1817
- https://access.redhat.com/errata/RHSA-2019:1810
- http://hg.openjdk.java.net/jdk-updates/jdk11u/rev/7f92fc4cdf02
- https://bugzilla.redhat.com/show_bug.cgi?id=1730078
- https://security-tracker.debian.org/tracker/CVE-2019-2818
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-2818
- https://nvd.nist.gov/vuln/detail/CVE-2019-2818
- https://ubuntu.com/security/CVE-2019-2818
Frequently Asked Questions
What is the severity of CVE-2019-2818?
The severity of CVE-2019-2818 is low with a CVSS score of 3.1.
Which versions of Java SE are affected by CVE-2019-2818?
Java SE versions 11.0.3 and 12.0.1 are affected by CVE-2019-2818.
How can an attacker exploit CVE-2019-2818?
An unauthenticated attacker with network access can exploit CVE-2019-2818 through multiple protocols to compromise Java SE.
What is the recommended remedy for openjdk-11 on Debian to address CVE-2019-2818?
The recommended remedy for openjdk-11 on Debian is to upgrade to version 11.0.16+8-1~deb10u1 or higher.
What is the recommended remedy for openjdk-12 on Ubuntu to address CVE-2019-2818?
The recommended remedy for openjdk-12 on Ubuntu is to upgrade to version 12.0.2+9-1 or higher.
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