[ GLSA 200611-13 ] Avahi: "netlink" message vulnerability

[GLSA]

Gentoo Linux Security Advisory

Title: Avahi: "netlink"message vulnerability (GLSA 200611-13)
Severity: normal
Exploitable: local
Date: November 20, 2006
Bug(s): #154322
ID: 200611-13

Synopsis

Avahi fails to verify the origin of netlink messages, which could allow local users to spoof network changes.

Background

Avahi is a system that facilitates service discovery on a local network.

Affected Packages

Package: net-dns/avahi
Vulnerable: < 0.6.15
Unaffected: >= 0.6.15
Architectures: All supported architectures


Description

Avahi does not check that the netlink messages come from the kernel instead of a user-space process.

Impact

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.

Workaround

There is no known workaround at this time.

Resolution

All Avahi users should upgrade to the latest version: