CVE-2009-0758

Severity: high (CVSS 7.8 v2.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 2.0% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2009-03-03 · updated 2026-06-16
Weakness: CWE-399

Description

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.

Affected products

Avahi-Daemon: 0.6.23

References

http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=517683
http://lists.opensuse.org/opensuse-security-announce/2010-02/msg00000.html
http://secunia.com/advisories/38420
http://www.debian.org/security/2010/dsa-2086
http://www.mandriva.com/security/advisories?name=MDVSA-2009:076
http://www.openwall.com/lists/oss-security/2009/03/02/1
http://www.securityfocus.com/bid/33946
http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=517683
http://lists.opensuse.org/opensuse-security-announce/2010-02/msg00000.html
http://secunia.com/advisories/38420
http://www.debian.org/security/2010/dsa-2086
http://www.mandriva.com/security/advisories?name=MDVSA-2009:076

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