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.
*CVSS:
| Base Score: | 4.9 |
| Access Vector: | Local |
| Access Complexity: | Low |
| Authentication: | Not Required |
| Confidentiality Impact: | Partial |
| Integrity Impact: | Partial |
| Availability Impact: | Partial |
| Temporal Score: | 3.6 |
| Exploitability: | Unproven |
| Remediation Level: | Official-Fix |
| Report Confidence: | Confirmed |
Consequences:
Bypass Security
Remedy:
Upgrade to the latest version of Avahi (0.6.15 or later), available from the Avahi Web site. See References.
References:
- Avahi Web site: Welcome to Avahi!.
- Avahi Web site: Milestone Avahi 0.6.10.
- avahi-tickets Mailing List, Mon Nov 6 14:53:58 CET 2006: [Avahi] #69: Avahi needs to check the originating process of netlink messages.
- 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
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
Reported:
Nov 13, 2006
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For corrections or additions please email xforce@iss.net
* According to the Forum of Incident Response and Security Teams (FIRST), the Common Vulnerability Scoring System (CVSS) is an "industry open standard designed to convey vulnerability severity and help to determine urgency and priority of response." IBM PROVIDES THE CVSS SCORES "AS IS" WITHOUT WARRANTY OF ANY KIND, INCLUDING THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. CUSTOMERS ARE RESPONSIBLE FOR ASSESSING THE IMPACT OF ANY ACTUAL OR POTENTIAL SECURITY VULNERABILITY.
The information within this database may change without notice. Use of this information constitutes acceptance for use in an AS IS condition. There are NO warranties, implied or otherwise, with regard to this information or its use. Any use of this information is at the user's risk. In no event shall IBM be held liable for any damages whatsoever arising out of or in connection with the use or spread of this information.