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Bug 2175227 - rsyslog capabilities dropping breaks udpspoof
Summary: rsyslog capabilities dropping breaks udpspoof
Keywords:
Status: CLOSED ERRATA
Alias: None
Product: Red Hat Enterprise Linux 9
Classification: Red Hat
Component: rsyslog
Version: 9.2
Hardware: Unspecified
OS: Unspecified
unspecified
unspecified
Target Milestone: rc
: ---
Assignee: Attila Lakatos
QA Contact: Dalibor Pospíšil
URL:
Whiteboard:
Depends On:
Blocks: 2176387
TreeView+ depends on / blocked
 
Reported: 2023-03-03 15:43 UTC by Dalibor Pospíšil
Modified: 2023-11-07 09:49 UTC (History)
2 users (show)

Fixed In Version:
Doc Type: No Doc Update
Doc Text:
Clone Of:
: 2176387 (view as bug list)
Environment:
Last Closed: 2023-11-07 08:33:06 UTC
Type: Bug
Target Upstream Version:
Embargoed:

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Issue Tracker RHELPLAN-150632 0 None None None 2023-03-03 15:45:55 UTC
Red Hat Issue Tracker SECENGSP-5069 0 None None None 2023-03-03 15:45:58 UTC
Red Hat Product Errata RHBA-2023:6444 0 None None None 2023-11-07 08:33:22 UTC

Description Dalibor Pospíšil 2023-03-03 15:43:41 UTC 
Description of problem:
The udpspoof module does not work correctly since the capabilities dropping feature was introduced.

Version-Release number of selected component (if applicable):
rsyslog-8.2102.0-111.el9

How reproducible:
100%

Steps to Reproduce:
1. use linked test

Actual results:
no message delivered

Expected results:
messages delivered
Comment 2 Attila Lakatos 2023-03-06 08:21:35 UTC 
It seems like that the libnet library for the udpspoof plugin fails to initialize.
We use the libnet_init(
		    LIBNET_RAW4,                            /* injection type */
		    NULL,                                   /* network interface */
		    pWrkrData->errbuf);                     /* errbuf */
function to create the libnet environment. However, the use of RAW sockets is defined here, which means that we need the CAP_NET_RAW capability, otherwise the plugin can not be initialized. Will create a scratch to double-check my theory.
Comment 3 Attila Lakatos 2023-03-06 09:15:26 UTC 
(In reply to Attila Lakatos from comment #2)
> It seems like that the libnet library for the udpspoof plugin fails to
> initialize.
> We use the libnet_init(
> 		    LIBNET_RAW4,                            /* injection type */
> 		    NULL,                                   /* network interface */
> 		    pWrkrData->errbuf);                     /* errbuf */
> function to create the libnet environment. However, the use of RAW sockets
> is defined here, which means that we need the CAP_NET_RAW capability,
> otherwise the plugin can not be initialized. Will create a scratch to
> double-check my theory.

Scratch-build: https://kojihub.stream.rdu2.redhat.com/koji/taskinfo?taskID=2041341
It passes the test suite, because the libnet library can be successfully initialized.
Comment 20 errata-xmlrpc 2023-11-07 08:33:06 UTC 
Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory (rsyslog bug fix and enhancement update), and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://access.redhat.com/errata/RHBA-2023:6444
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