Vulnerability Monitor

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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.

Security Impact Summary

CVE-2009-0758 is a security vulnerability that . Impacting 1 product from avahi organizations running these solutions should prioritize assessment and patching.

Historical Context

Originally identified in 2009, this vulnerability predates many modern security frameworks and practices. The vulnerability landscape of that era was characterized by different threat models and less mature defense mechanisms compared to contemporary standards.

Published

2009-03-03T16:30:05.313

Last Modified

2026-06-16T23:05:44.850

Status

Modified

Source

[email protected]

Severity

CVSSv2: 7.8 (HIGH)

CVSSv2 Vector

AV:N/AC:L/Au:N/C:N/I:N/A:C

Access Vector: NETWORK
Access Complexity: LOW
Authentication: NONE
Confidentiality Impact: NONE
Integrity Impact: NONE
Availability Impact: COMPLETE

Exploitability Score

10.0

Impact Score

6.9

Weaknesses

Type: Primary
CWE-399

Affected Vendors & Products

Type	Vendor	Product	Version/Range	Vulnerable?
Application	avahi	avahi-daemon	0.6.23	Yes

References

http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=517683 ([email protected])
http://lists.opensuse.org/opensuse-security-announce/2010-02/msg00000.html ([email protected])
http://secunia.com/advisories/38420 ([email protected])
http://www.debian.org/security/2010/dsa-2086 ([email protected])
http://www.mandriva.com/security/advisories?name=MDVSA-2009:076 ([email protected])
http://www.openwall.com/lists/oss-security/2009/03/02/1 ([email protected])
http://www.securityfocus.com/bid/33946 ([email protected])
http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=517683 (af854a3a-2127-422b-91ae-364da2661108)
http://lists.opensuse.org/opensuse-security-announce/2010-02/msg00000.html (af854a3a-2127-422b-91ae-364da2661108)
http://secunia.com/advisories/38420 (af854a3a-2127-422b-91ae-364da2661108)
http://www.debian.org/security/2010/dsa-2086 (af854a3a-2127-422b-91ae-364da2661108)
http://www.mandriva.com/security/advisories?name=MDVSA-2009:076 (af854a3a-2127-422b-91ae-364da2661108)
http://www.openwall.com/lists/oss-security/2009/03/02/1 (af854a3a-2127-422b-91ae-364da2661108)
http://www.securityfocus.com/bid/33946 (af854a3a-2127-422b-91ae-364da2661108)

How SecUtils Interprets This CVE

SecUtils normalizes and enriches National Vulnerability Database (NVD) records by standardizing vendor and product identifiers, aggregating vulnerability metadata from both NVD and MITRE sources, and providing structured context for security teams. For avahi's affected products, we extract Common Platform Enumeration (CPE) data, Common Weakness Enumeration (CWE) classifications, CVSS severity metrics, and reference data to enable rapid vulnerability prioritization and asset correlation. This record contains no exploit code, proof-of-concept instructions, or attack methodologies—only defensive intelligence necessary for patch management, risk assessment, and security operations.