Multiple vulnerabilities were found in Avahi, allowing for Denial of Service.
| Package | Arch | Vulnerable | Unaffected |
|---|---|---|---|
| net-dns/avahi | * | < 0.6.28-r1 | >= 0.6.28-r1 |
Avahi is a system which facilitates service discovery on a local network.
Multiple vulnerabilities have been discovered in Avahi. Please review the CVE identifiers referenced below for details.
A remote attacker could cause a Denial of Service.
There is no known workaround at this time.
All Avahi users should upgrade to the latest version:
# emerge --sync # emerge --ask --oneshot --verbose ">=net-dns/avahi-0.6.28-r1"
An error in Avahi might lead to a Denial of Service via network and CPU consumption.
| Package | Arch | Vulnerable | Unaffected |
|---|---|---|---|
| net-dns/avahi | * | < 0.6.24-r2 | >= 0.6.24-r2 |
Avahi is a system that facilitates service discovery on a local network.
Rob Leslie reported that the originates_from_local_legacy_unicast_socket() function in avahi-core/server.c does not account for the network byte order of a port number when processing incoming multicast packets, leading to a multicast packet storm.
A remote attacker could send specially crafted legacy unicast mDNS query packets to the Avahi daemon, resulting in a Denial of Service due to network bandwidth and CPU consumption.
There is no known workaround at this time.
All Avahi users should upgrade to the latest version:
# emerge --sync # emerge --ask --oneshot --verbose ">=net-dns/avahi-0.6.24-r2"
A Denial of Service vulnerability has been discovered in Avahi.
| Package | Arch | Vulnerable | Unaffected |
|---|---|---|---|
| net-dns/avahi | * | < 0.6.24 | >= 0.6.24 |
Avahi is a system that facilitates service discovery on a local network.
Hugo Dias reported a failed assertion in the originates_from_local_legacy_unicast_socket() function in avahi-core/server.c when processing mDNS packets with a source port of 0.
A remote attacker could send specially crafted packets to the daemon, leading to its crash.
There is no known workaround at this time.
All Avahi users should upgrade to the latest version:
# emerge --sync # emerge --ask --oneshot --verbose ">=net-dns/avahi-0.6.24"
Avahi fails to verify the origin of netlink messages, which could allow local users to spoof network changes.
| Package | Arch | Vulnerable | Unaffected |
|---|---|---|---|
| net-dns/avahi | * | < 0.6.15 | >= 0.6.15 |
Avahi is a system that facilitates service discovery on a local network.
Avahi does not check that the netlink messages come from the kernel instead of a user-space process.
A local attacker could exploit this vulnerability by crafting malicious netlink messages and trick Avahi to react to fake network changes. This could lead users to connect to untrusted services without knowing.
There is no known workaround at this time.
All Avahi users should upgrade to the latest version:
# emerge --sync # emerge --ask --oneshot --verbose ">=net-dns/avahi-0.6.15"