Summary
Avahi is an implementation of the DNS Service Discovery and Multicast DNS specifications for Zero Configuration Networking. It facilitates service discovery on a local network. Avahi and Avahi-aware applications allow you to plug your computer into a network and, with no configuration, view other people to chat with, view printers to print with, and find shared files on other computers.
Security Fix(es):
* avahi: Local DoS by event-busy-loop from writing long lines to /run/avahi-daemon/socket (CVE-2021-3468)
* avahi: reachable assertion in avahi_s_host_name_resolver_start when trying to resolve badly-formatted hostnames (CVE-2021-3502)
* avahi: avahi-daemon can be crashed via DBus (CVE-2023-1981)
For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.
Additional Changes:
For detailed information on changes in this release, see the AlmaLinux Release Notes linked from the References section.
Fixed packages 10
| Release | Package | Fixed in |
|---|---|---|
| AlmaLinux · 9 | avahi | 0.8-15.el9 |
| AlmaLinux · 9 | avahi-compat-howl | 0.8-15.el9 |
| AlmaLinux · 9 | avahi-compat-howl-devel | 0.8-15.el9 |
| AlmaLinux · 9 | avahi-compat-libdns_sd | 0.8-15.el9 |
| AlmaLinux · 9 | avahi-compat-libdns_sd-devel | 0.8-15.el9 |
| AlmaLinux · 9 | avahi-devel | 0.8-15.el9 |
| AlmaLinux · 9 | avahi-glib | 0.8-15.el9 |
| AlmaLinux · 9 | avahi-glib-devel | 0.8-15.el9 |
| AlmaLinux · 9 | avahi-libs | 0.8-15.el9 |
| AlmaLinux · 9 | avahi-tools | 0.8-15.el9 |
Vulnerabilities 3
-
Medium 5.5
A vulnerability was found in the avahi library. This flaw allows an unprivileged user to make a dbus call, causing the …
-
Unscored —
A flaw was found in avahi in versions 0.6 up to 0.8. The event used to signal the termination of the client connection …
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Unscored —
A flaw was found in avahi 0.8-5. A reachable assertion is present in avahi_s_host_name_resolver_start function allowing…
References
-
report
https://access.redhat.com/security/cve/CVE-2021-3468
-
report
https://access.redhat.com/security/cve/CVE-2021-3502
-
report
https://access.redhat.com/security/cve/CVE-2023-1981
-
report
https://bugzilla.redhat.com/1939614
-
report
https://bugzilla.redhat.com/1946914
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report
https://bugzilla.redhat.com/2185911
-
advisory
https://errata.almalinux.org/9/ALSA-2023-6707.html