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DescriptionDalibor 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
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.
(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.
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