[jira] [Commented] (LOG4J2-1863) Add support for filtering input in TcpSocketServer and UdpSocketServer

["Donatien RIVIERE (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/LOG4J2-1863?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16339319#comment-16339319 ] 

Donatien RIVIERE commented on LOG4J2-1863:
------------------------------------------

Log4j socket servers have been moved to "logging-log4j-tools" repository in a "log4j-server" project since 2.9.0.

But this artifact "org.apache.logging.log4j:log4j-server" is not published to any public maven repository, which makes it almost totally hidden, and unusable.

What is the plan about that ?

[https://git-wip-us.apache.org/repos/asf?p=logging-log4j-tools.git;a=tree;f=log4j-server;hb=HEAD]

> Add support for filtering input in TcpSocketServer and UdpSocketServer
> ----------------------------------------------------------------------
>
>                 Key: LOG4J2-1863
>                 URL: https://issues.apache.org/jira/browse/LOG4J2-1863
>             Project: Log4j 2
>          Issue Type: New Feature
>          Components: Receivers
>    Affects Versions: 2.8.1
>            Reporter: Matt Sicker
>            Assignee: Matt Sicker
>            Priority: Major
>             Fix For: 2.8.2
>
>
> It is best practice to add a configurable class filter to ObjectInputStream usage when input comes from untrusted sources. Add this feature to TcpSocketServer and UdpSocketServer along with sensible default settings. This feature is unnecessary in JmsServer as that relies on the underlying configuration of the JMS server (e.g., ActiveMQ has a similar configuration option).
> h3. Security Details
> {code}
> CVE-2017-5645: Apache Log4j socket receiver deserialization vulnerability
> Severity: High
> CVSS Base Score: 7.5 (AV:N/AC:L/Au:N/C:P/I:P/A:P)
> Vendor: The Apache Software Foundation
> 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
> {code}



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