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Ubuntu Security Notice USN-4600-2
October 27, 2020
netty vulnerabilities
==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:
– Ubuntu 18.04 LTS
Summary:
netty could be made to crash or run programs if it received
specially crafted network traffic.
Software Description:
– netty: None
Details:
USN-4600-1 fixed multiple vunerabilities in Netty 3.9. This update provides
the corresponding fixes for CVE-2019-20444, CVE-2019-20445 for Netty.
Also it was discovered that Netty allow for unbounded memory allocation. A
remote attacker could send a large stream to the Netty server causing it to
crash (denial of service). (CVE-2020-11612)
Original advisory details:
It was discovered that Netty had HTTP request smuggling vulnerabilities. A
remote attacker could used it to extract sensitive information. (CVE-2019-16869,
CVE-2019-20444, CVE-2019-20445, CVE-2020-7238)
Update instructions:
The problem can be corrected by updating your system to the following
package versions:
Ubuntu 18.04 LTS:
libnetty-java 1:4.1.7-4ubuntu0.1
In general, a standard system update will make all the necessary changes.
References:
https://usn.ubuntu.com/4600-2
https://usn.ubuntu.com/4600-1
CVE-2019-20444, CVE-2019-20445, CVE-2020-11612
Package Information:
https://launchpad.net/ubuntu/+source/netty/1:4.1.7-4ubuntu0.1
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