Avahi netlink security bypass
| avahi-netlink-security-bypass (30207) |  Medium Risk |
Description:
Avahi could allow a local attacker to bypass security restrictions, caused by improper validation of netlink messages. An attacker could exploit this vulnerability to bypass security by tricking Avahi into responding to network changes that did not occur.
Platforms Affected:
- Avahi Team, Avahi prior to 0.6.15
- Canonical, Ubuntu 5.10
- Canonical, Ubuntu 6.06 LTS
- Canonical, Ubuntu 6.10
- Gentoo, Linux
- MandrakeSoft, Mandrake Linux 2007 X86_64
- MandrakeSoft, Mandrake Linux 2007
Remedy:
Upgrade to the latest version of Avahi (0.6.15 or later), available from the Avahi Web site. See References.
Consequences:
Bypass Security
References:
- Avahi Web site, Welcome to Avahi! at http://avahi.org/.
- Avahi Web site, Milestone Avahi 0.6.10 at http://avahi.org/milestone/Avahi%200.6.10.
- avahi-tickets Mailing List, Mon Nov 6 14:53:58 CET 2006, [Avahi] #69: Avahi needs to check the originating process of netlink messages at https://tango.0pointer.de/pipermail/avahi-tickets/2006-November/000320.html.
- BID-21016: Avahi Unauthorized Data Manipulation Vulnerability
- CVE-2006-5461: 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.
- GLSA-200611-13: Avahi: netlink message vulnerability
- MDKSA-2006:215: Updated avahi packages fix netlink vulnerability
- SA22807: Avahi "netlink" Message Vulnerability
- SECTRACK ID: 1017257: Avahi Lets Remote Users Manipulate the Service By Spoofing Netlink Messages
- SUSE-SR:2006:026: SUSE Security Summary Report
- USN-380-1: Avahi vulnerability
- USN-380-2: Avahi regression
- VUPEN/ADV-2006-4474: Avahi netlink Message Source Validation Local Security Bypass Vulnerability
Reported:
Nov 13, 2006
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