Avahi fails to verify the origin of netlink messages, which could allow local users to spoof network changes.
|Package||net-dns/avahi on all architectures|
|Affected versions||< 0.6.15|
|Unaffected versions||>= 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"
November 20, 2006
November 20, 2006: 01