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Vulnerability Details : CVE-2009-0758

The originates_from_local_legacy_unicast_socket function in avahi-core/server.c in avahi-daemon 0.6.23 does not account for the network byte order of a port number when processing incoming multicast packets, which allows remote attackers to cause a denial of service (network bandwidth and CPU consumption) via a crafted legacy unicast mDNS query packet that triggers a multicast packet storm.
Publish Date : 2009-03-03 Last Update Date : 2010-08-12
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- CVSS Scores & Vulnerability Types

CVSS Score
Confidentiality Impact None (There is no impact to the confidentiality of the system.)
Integrity Impact None (There is no impact to the integrity of the system)
Availability Impact Complete (There is a total shutdown of the affected resource. The attacker can render the resource completely unavailable.)
Access Complexity Low (Specialized access conditions or extenuating circumstances do not exist. Very little knowledge or skill is required to exploit. )
Authentication Not required (Authentication is not required to exploit the vulnerability.)
Gained Access None
Vulnerability Type(s) Denial Of Service
CWE ID 399

- Vendor Statements

This issue has been addressed in Red Hat Enterprise Linux 5 via
Source: Redhat

- Additional Vendor Supplied Data

Vendor Impact CVSS Score CVSS Vector Report Date Publish Date
Redhat low
AV:A/AC:L/Au:N/C:N/I:N/A:P 2009-03-02 2009-03-01
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- Related OVAL Definitions

Title Definition Id Class Family
CVE-2009-0758 unix
DEPRECATED: ELSA-2010-0528 -- avahi security update (moderate) oval:org.mitre.oval:def:28248 unix
DSA-2086-1 avahi -- several oval:org.mitre.oval:def:12699 unix
ELSA-2010:0528: avahi security update (Moderate) oval:org.mitre.oval:def:22789 unix
RHSA-2010:0528: avahi security update (Moderate) oval:org.mitre.oval:def:22345 unix
RHSA-2010:0528: avahi security update (Moderate) oval:com.redhat.rhsa:def:20100528 unix
OVAL (Open Vulnerability and Assessment Language) definitions define exactly what should be done to verify a vulnerability or a missing patch. Check out the OVAL definitions if you want to learn what you should do to verify a vulnerability.

- Products Affected By CVE-2009-0758

# Product Type Vendor Product Version Update Edition Language
1 Application Avahi Avahi-daemon 0.6.23 Version Details Vulnerabilities

- Number Of Affected Versions By Product

Vendor Product Vulnerable Versions
Avahi Avahi-daemon 1

- References For CVE-2009-0758
MLIST [oss-security] 20090302 CVE id request: avahi
BID 33946 Avahi 'avahi-core/server.c' Multicast DNS Denial Of Service Vulnerability Release Date:2010-09-29
SUSE SUSE-SR:2010:002

- Metasploit Modules Related To CVE-2009-0758

There are not any metasploit modules related to this CVE entry (Please visit for more information)

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