Filtered by vendor Avahi
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Filtered by product Avahi
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Total
19 CVE
| CVE | Vendors | Products | Updated | CVSS v3.1 |
|---|---|---|---|---|
| CVE-2025-59529 | 1 Avahi | 1 Avahi | 2025-12-19 | 5.5 Medium |
| Avahi is a system which facilitates service discovery on a local network via the mDNS/DNS-SD protocol suite. In versions up to and including 0.9-rc2, the simple protocol server ignores the documented client limit and accepts unlimited connections, allowing for easy local DoS. Although `CLIENTS_MAX` is defined, `server_work()` unconditionally `accept()`s and `client_new()` always appends the new client and increments `n_clients`. There is no check against the limit. When client cannot be accepted as a result of maximal socket number of avahi-daemon, it logs unconditionally error per each connection. Unprivileged local users can exhaust daemon memory and file descriptors, causing a denial of service system-wide for mDNS/DNS-SD. Exhausting local file descriptors causes increased system load caused by logging errors of each of request. Overloading prevents glibc calls using nss-mdns plugins to resolve `*.local.` names and link-local addresses. As of time of publication, no known patched versions are available, but a candidate fix is available in pull request 808, and some workarounds are available. Simple clients are offered for nss-mdns package functionality. It is not possible to disable the unix socket `/run/avahi-daemon/socket`, but resolution requests received via DBus are not affected directly. Tools avahi-resolve, avahi-resolve-address and avahi-resolve-host-name are not affected, they use DBus interface. It is possible to change permissions of unix socket after avahi-daemon is started. But avahi-daemon does not provide any configuration for it. Additional access restrictions like SELinux can also prevent unwanted tools to access the socket and keep resolution working for trusted users. | ||||
| CVE-2017-6519 | 3 Avahi, Canonical, Redhat | 3 Avahi, Ubuntu Linux, Enterprise Linux | 2025-12-03 | 9.1 Critical |
| avahi-daemon in Avahi through 0.6.32 and 0.7 inadvertently responds to IPv6 unicast queries with source addresses that are not on-link, which allows remote attackers to cause a denial of service (traffic amplification) and may cause information leakage by obtaining potentially sensitive information from the responding device via port-5353 UDP packets. NOTE: this may overlap CVE-2015-2809. | ||||
| CVE-2023-38473 | 2 Avahi, Redhat | 3 Avahi, Enterprise Linux, Rhel Eus | 2025-11-03 | 6.2 Medium |
| A vulnerability was found in Avahi. A reachable assertion exists in the avahi_alternative_host_name() function. | ||||
| CVE-2023-38472 | 2 Avahi, Redhat | 3 Avahi, Enterprise Linux, Rhel Eus | 2025-11-03 | 6.2 Medium |
| A vulnerability was found in Avahi. A reachable assertion exists in the avahi_rdata_parse() function. | ||||
| CVE-2023-38471 | 2 Avahi, Redhat | 3 Avahi, Enterprise Linux, Rhel Eus | 2025-11-03 | 6.2 Medium |
| A vulnerability was found in Avahi. A reachable assertion exists in the dbus_set_host_name function. | ||||
| CVE-2023-38470 | 2 Avahi, Redhat | 3 Avahi, Enterprise Linux, Rhel Eus | 2025-11-03 | 6.2 Medium |
| A vulnerability was found in Avahi. A reachable assertion exists in the avahi_escape_label() function. | ||||
| CVE-2023-38469 | 2 Avahi, Redhat | 3 Avahi, Enterprise Linux, Rhel Eus | 2025-11-03 | 6.2 Medium |
| A vulnerability was found in Avahi, where a reachable assertion exists in avahi_dns_packet_append_record. | ||||
| CVE-2023-1981 | 3 Avahi, Fedoraproject, Redhat | 3 Avahi, Fedora, Enterprise Linux | 2025-11-03 | 5.5 Medium |
| A vulnerability was found in the avahi library. This flaw allows an unprivileged user to make a dbus call, causing the avahi daemon to crash. | ||||
| CVE-2011-1002 | 5 Avahi, Canonical, Debian and 2 more | 5 Avahi, Ubuntu Linux, Debian Linux and 2 more | 2025-04-11 | N/A |
| avahi-core/socket.c in avahi-daemon in Avahi before 0.6.29 allows remote attackers to cause a denial of service (infinite loop) via an empty mDNS (1) IPv4 or (2) IPv6 UDP packet to port 5353. NOTE: this vulnerability exists because of an incorrect fix for CVE-2010-2244. | ||||
| CVE-2010-2244 | 2 Avahi, Redhat | 2 Avahi, Enterprise Linux | 2025-04-11 | N/A |
| The AvahiDnsPacket function in avahi-core/socket.c in avahi-daemon in Avahi 0.6.16 and 0.6.25 allows remote attackers to cause a denial of service (assertion failure and daemon exit) via a DNS packet with an invalid checksum followed by a DNS packet with a valid checksum, a different vulnerability than CVE-2008-5081. | ||||
| CVE-2008-5081 | 2 Avahi, Redhat | 2 Avahi, Enterprise Linux | 2025-04-09 | N/A |
| The originates_from_local_legacy_unicast_socket function (avahi-core/server.c) in avahi-daemon in Avahi before 0.6.24 allows remote attackers to cause a denial of service (crash) via a crafted mDNS packet with a source port of 0, which triggers an assertion failure. | ||||
| CVE-2006-6870 | 1 Avahi | 1 Avahi | 2025-04-09 | N/A |
| The consume_labels function in avahi-core/dns.c in Avahi before 0.6.16 allows remote attackers to cause a denial of service (infinite loop) via a crafted compressed DNS response with a label that points to itself. | ||||
| CVE-2007-3372 | 1 Avahi | 1 Avahi | 2025-04-09 | N/A |
| The Avahi daemon in Avahi before 0.6.20 allows attackers to cause a denial of service (exit) via empty TXT data over D-Bus, which triggers an assert error. | ||||
| CVE-2006-5461 | 1 Avahi | 1 Avahi | 2025-04-09 | N/A |
| Avahi before 0.6.15 does not verify the sender identity of netlink messages to ensure that they come from the kernel instead of another process, which allows local users to spoof network changes to Avahi. | ||||
| CVE-2006-2289 | 1 Avahi | 1 Avahi | 2025-04-03 | N/A |
| Buffer overflow in avahi-core in Avahi before 0.6.10 allows local users to execute arbitrary code via unknown vectors. | ||||
| CVE-2006-2288 | 1 Avahi | 1 Avahi | 2025-04-03 | N/A |
| Avahi before 0.6.10 allows local users to cause a denial of service (mDNS/DNS-SD service disconnect) via unspecified mDNS name conflicts. | ||||
| CVE-2021-3468 | 3 Avahi, Debian, Redhat | 4 Avahi, Debian Linux, Enterprise Linux and 1 more | 2025-02-13 | 5.5 Medium |
| 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 on the avahi Unix socket is not correctly handled in the client_work function, allowing a local attacker to trigger an infinite loop. The highest threat from this vulnerability is to the availability of the avahi service, which becomes unresponsive after this flaw is triggered. | ||||
| CVE-2021-3502 | 2 Avahi, Redhat | 2 Avahi, Enterprise Linux | 2024-11-21 | 5.5 Medium |
| A flaw was found in avahi 0.8-5. A reachable assertion is present in avahi_s_host_name_resolver_start function allowing a local attacker to crash the avahi service by requesting hostname resolutions through the avahi socket or dbus methods for invalid hostnames. The highest threat from this vulnerability is to the service availability. | ||||
| CVE-2021-26720 | 2 Avahi, Debian | 2 Avahi, Debian Linux | 2024-11-21 | 7.8 High |
| avahi-daemon-check-dns.sh in the Debian avahi package through 0.8-4 is executed as root via /etc/network/if-up.d/avahi-daemon, and allows a local attacker to cause a denial of service or create arbitrary empty files via a symlink attack on files under /run/avahi-daemon. NOTE: this only affects the packaging for Debian GNU/Linux (used indirectly by SUSE), not the upstream Avahi product. | ||||
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