REDHAT-BUG-1939614
First published: Tue Mar 16 2021(Updated: )
A flaw was found in avahi deamon. Denial of service can be triggered by writing long lines to /run/avahi-daemon/socket resulting in an unresponsive busy-loop of the daemon. References: <a href="https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=984938">https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=984938</a>
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Avahi AutoIP Daemon |
Never miss a vulnerability like this again
Sign up to SecAlerts for real-time vulnerability data matched to your software, aggregated from hundreds of sources.
Reference Links
- https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=984938
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1939615
- https://github.com/lathiat/avahi/pull/330
- https://access.redhat.com/errata/RHSA-2023:6707
- https://access.redhat.com/errata/RHSA-2023:7836
- https://access.redhat.com/errata/RHSA-2024:0418
- https://access.redhat.com/errata/RHSA-2024:0576
- https://bugzilla.redhat.com/show_bug.cgi?id=1939614
Frequently Asked Questions
What is the severity of REDHAT-BUG-1939614?
The severity of REDHAT-BUG-1939614 is categorized as a denial of service vulnerability due to the busy-loop condition it can create in the avahi daemon.
How do I fix REDHAT-BUG-1939614?
To fix REDHAT-BUG-1939614, you should upgrade to the latest version of the avahi-daemon that addresses this vulnerability.
What versions of avahi-daemon are affected by REDHAT-BUG-1939614?
All versions of avahi-daemon prior to the patch that resolves REDHAT-BUG-1939614 are considered affected.
What causes the vulnerability in REDHAT-BUG-1939614?
The vulnerability in REDHAT-BUG-1939614 is caused by the daemon entering a busy-loop state when long lines are written to /run/avahi-daemon/socket.
Is there a workaround for REDHAT-BUG-1939614?
A temporary workaround for REDHAT-BUG-1939614 can be implemented by restricting the input to the avahi-daemon socket to prevent writing excessively long lines.
- agent/type
- agent/first-publish-date
- agent/severity
- agent/description
- agent/event
- agent/references
- collector/redhat-bugzilla
- source/Red Hat
- alias/CVE-2021-3468
- agent/last-modified-date
- agent/source
- agent/tags
- agent/softwarecombine
- agent/guess-ai
- agent/software-canonical-lookup
- agent/software-canonical-lookup-request
- vendor/avahi
- canonical/avahi autoip daemon