Apache Log4j socket receiver deserialization vulnerability (CVE-2017-5645)

Versions Affected: all versions from 2.0-alpha1 to 2.8.1

Description:

When using the TCP socket server or UDP socket server to
receive serialized log events from another application, a specially crafted
binary payload can be sent that, when deserialized, can execute arbitrary
code.

Mitigation:

Java 7+ users should migrate to version 2.8.2 or avoid using
the socket server classes. Java 6 users should avoid using the TCP or UDP
socket server classes, or they can manually backport the security fix from
2.8.2: <https://git-wip-us.apache.org/repos/asf?p=logging-log4j2.
git;h=5dcc192>

Credit: This issue was discovered by Marcio Almeida de Macedo of Red Team
at Telstra