Debian Security Advisory
DLA-2364-1 netty -- LTS security update
- Date Reported:
- 04 Sep 2020
- Affected Packages:
- Security database references:
- In the Debian bugtracking system: Bug 950966, Bug 950967.
In Mitre's CVE dictionary: CVE-2019-20444, CVE-2019-20445, CVE-2020-7238, CVE-2020-11612.
- More information:
Several vulnerabilities have been discovered in netty, a Java NIO client/server socket framework.
HttpObjectDecoder.java in Netty before 4.1.44 allows an HTTP header that lacks a colon, which might be interpreted as a separate header with an incorrect syntax, or might be interpreted as an "invalid fold."
HttpObjectDecoder.java in Netty before 4.1.44 allows a Content-Length header to be accompanied by a second Content-Length header, or by a Transfer-Encoding header.
Netty 4.1.43.Final allows HTTP Request Smuggling because it mishandles Transfer-Encoding whitespace (such as a [space]Transfer-Encoding:chunked line) and a later Content-Length header. This issue exists because of an incomplete fix for CVE-2019-16869.
The ZlibDecoders in Netty 4.1.x before 4.1.46 allow for unbounded memory allocation while decoding a ZlibEncoded byte stream. An attacker could send a large ZlibEncoded byte stream to the Netty server, forcing the server to allocate all of its free memory to a single decoder.
For Debian 9 stretch, these problems have been fixed in version 1:4.1.7-2+deb9u2.
We recommend that you upgrade your netty packages.
For the detailed security status of netty please refer to its security tracker page at: https://security-tracker.debian.org/tracker/netty
Further information about Debian LTS security advisories, how to apply these updates to your system and frequently asked questions can be found at: https://wiki.debian.org/LTS